CN102857316B - A kind of method and system realizing source looped network protection - Google Patents
A kind of method and system realizing source looped network protection Download PDFInfo
- Publication number
- CN102857316B CN102857316B CN201110179643.3A CN201110179643A CN102857316B CN 102857316 B CN102857316 B CN 102857316B CN 201110179643 A CN201110179643 A CN 201110179643A CN 102857316 B CN102857316 B CN 102857316B
- Authority
- CN
- China
- Prior art keywords
- node
- link
- tunnel group
- protecting tunnel
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention discloses a kind of method and system realizing source looped network protection, the method includes: arrange the traffic table of protecting tunnel group at service access node；Node that this traffic table is comprised along Business Stream outbound course for the active link recording described protecting tunnel group and the state of each span of active link；Described protecting tunnel group link fault discovery node or receive is switched the node of order and is sent APS message; in described protecting tunnel group other non-automatic pretection switch targets of messages node along described APS message sender to forward described APS message; after in described protecting tunnel group, service access node receives described APS message; update the state of corresponding span in the traffic table of the described protecting tunnel group safeguarded, determine protecting tunnel group state and determine whether to perform link switchover.This method can decrease ring figure configuration workload, improves degree of intelligence when network processes path direction topology changes.
Description
Technical field
The present invention relates to field of data communication, relate more specifically to a kind of method realizing looped network protection and be
System.
Background technology
Multiprotocol label switching (Multi-protocol Label Switching is called for short MPLS) technology is
One of important technology in Packet Transport Network, the survivability of network is that measurement Packet Transport Network network quality is important
One of index, in order to promote the survivability of network, devises in the industry various network protection reset mode.Point
Group transmits the linear protection of protected mode in the conventional network of net and looped network protection, and looped network protection has two kinds of guarantors
Protection mechanism, is Wrapping protected mode and Steering protected mode respectively.Wrapping protection side
Formula is loopback pretection switch based on fault phase neighbors, and Steering protected mode is to arrive based on business end
The pretection switch of end.This case relates generally to the implementation method of Steering protected mode.
As shown in Figure 1a, in the case of using Steering protected mode, when looped network fault-free or request
During switching, the operating path of Business Stream is: 1<->2<->3<->4；Protection path is:
1<->6<->5<->4<->3<->2<->1。
As shown in Figure 1 b, between node 2 and node 3 during link failure, node 2 and node 3 points
Along ring, two ports (i.e. west is to port and east orientation port) do not send APS (APS) to the other side
Message.Node 1 and node 4 receive perform after APS message work flow to, by Business Stream according to
1<->6<->5<->4 path forwards.
Realization mechanism and the Wrapping mechanism of Steering protected mode are different, such as Fig. 1 b, work as joint
After point 2 detects fault, send carry APS message (APS to point of proximity node 3 and reverse node
Message is typically encapsulated as the form of OAM message), node 3 detects post-fault mode phase therewith
With.After other node receives APS message, check this section according to the ring figure (Ring map) pre-saved
Business on point is affected situation by trouble point, by the Business Stream that affected by fault at its source node and end
Node performs bridge joint and switches, and is switched to protect link from active link.This programme be based on APS message and
The ring figure that equipment has preserved is to confirm affected business, and it is fixed that APS message has in ITU-T G.8132 standard
Justice, does not repeats.
Such scheme safeguards conventional the including of mode of ring figure:
Whole ring-network topology figure and topological relation is found by a kind of dynamic protocol, and by the friendship of node
Complete the renewal of ring figure mutually.The defect of this mode is to improve the utilization rate of the network bandwidth and node cpu.
By static configuration means each node configuration ring figure in ring-network topology figure.The defect of this mode is
Every equipment carries out static configuration whole ring-network topology figure, and configuration workload is big, is unfavorable for topology change.
So needing new solution to realize Steering formula looped network protection.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method and system realizing looped network protection, saves
The network bandwidth and node power consumption, improve degree of intelligence when network processes path direction topology changes.
In order to solve above-mentioned technical problem, the invention provides a kind of method realizing looped network protection, including:
The traffic table of protecting tunnel group is set at service access node；This traffic table is used for recording described protecting tunnel
The node that comprised along Business Stream outbound course of active link of group and the state of each span of active link；
Described protecting tunnel group link fault discovery node or receive is switched the node of order and is sent protection automatically
Switching messages, in described protecting tunnel group other non-automatic pretection switch targets of messages node along described automatically
Pretection switch message sender is to forwarding described APS message, business in described protecting tunnel group
After access node receives described APS message, update the industry of the described protecting tunnel group safeguarded
The state of corresponding span in business table, determines protecting tunnel group state and determines whether to perform link switchover.
Further, said method can also have the following characteristics that
It is switched to protect the method for link to include from active link by Business Stream during active link fault: described
Protecting tunnel group link fault discovery nodal test to after active link fault, along link east to and west
Direction sends the APS message that instruction place, trouble point span is fault warning state, described tunnel
In pipe protection group, other non-automatic pretection switch targets of messages node sends along described APS message
APS message described in direction forwarding, in described protecting tunnel group, service access node receives described
After APS message, update corresponding span in the traffic table of the described protecting tunnel group safeguarded
State, determines that protecting tunnel group state is guard mode, and is switched to from described active link by Business Stream
Protection link.
Further, said method can also have the following characteristics that
After active link fault recovery, Business Stream is included from the method for protection link switchover to active link:
Described protecting tunnel group link fault recovery find nodal test to after active link fault, eastern along link
Direction and west are to sending the APS that instruction fault recovery point place span is Wait-to-Restore state
Message, in described protecting tunnel group, other non-automatic pretection switch targets of messages node is along described automatic protection
Switching messages sending direction forwards described APS message, service access in described protecting tunnel group
After node receives described APS message, update the traffic table of the described protecting tunnel group safeguarded
In the state of corresponding span, calculate the state of protecting tunnel group when being Wait-to-Restore state, start wait extensive
Multiple intervalometer, after this intervalometer arrives, determines that protecting tunnel group state is duty, and by Business Stream
From protection link switchover to active link.
Further, said method can also have the following characteristics that
Switch command triggers by agreement and Business Stream is switched to protect from active link the method bag of link
Include: in described protecting tunnel group, the agreement on active link is switched order receiving node and received agreement and switch life
After order, span automatic that be in Forced Switch state is indicated to protect to west to transmission along link east
Switching messages, in described protecting tunnel group other non-automatic pretection switch targets of messages node along described automatically
Pretection switch message sender is to forwarding described APS message, business in described protecting tunnel group
After access node receives described APS message, update the industry of the described protecting tunnel group safeguarded
In business table, the state of corresponding span, determines that protecting tunnel group state is guard mode, and by Business Stream from work
Make link switchover to protection link.
Further, said method can also have the following characteristics that
Command triggers is switched by Business Stream from the method bag of protection link switchover to active link by agreement
Include: described protecting tunnel group is protected the agreement on link switch order receiving node and receive agreement and switch life
After order, span automatic that be in protection blocking state is indicated to protect to west to transmission along link east
Switching messages, in described protecting tunnel group other non-automatic pretection switch targets of messages node along described automatically
Pretection switch message sender is to forwarding described APS message, business in described protecting tunnel group
After access node receives described APS message, update the industry of the described protecting tunnel group safeguarded
In business table, the state of corresponding span, determines that protecting tunnel group state is duty, and by Business Stream from guarantor
Protect link switchover to active link.
In order to solve above-mentioned technical problem, present invention also offers a kind of system realizing looped network protection, its
In, described system includes the multiple link nodes constituting protecting tunnel group；Described link nodes, is used for making
During for service access node, the traffic table of protecting tunnel group is set at service access node；This traffic table is used
The node comprised along Business Stream outbound course in the active link recording described protecting tunnel group and work
The state of each span of link；It is additionally operable to find that node or agreement switch order receiving node as link failure
Time send APS message；It is additionally operable to disappear as non-automatic pretection switch in described protecting tunnel group
Along described APS message sender to forwarding described APS to disappear during breath destination node
Breath；After receiving described APS message when being additionally operable to as service access node, update and safeguarded
Described protecting tunnel group traffic table in the state of corresponding span, determine protecting tunnel group state and determine
Whether perform link switchover.
Further, said system can also have the following characteristics that
Described link nodes, is additionally operable to arrive as described protecting tunnel group link fault discovery nodal test
After active link fault, trouble point place span is indicated to be fault accuse to west to transmission along link east
The APS message of alert state；It is additionally operable to receive described automatic protection as service access node
After changing message, update the state of corresponding span in the traffic table of the described protecting tunnel group safeguarded, determine
Protecting tunnel group state is guard mode, and is switched to protect link from described active link by Business Stream.
Further, said system can also have the following characteristics that
Described link nodes, is additionally operable to find node inspection as described protecting tunnel group link fault recovery
After measuring active link fault, indicate fault recovery point place span to west to transmission along link east
APS message for Wait-to-Restore state；It is additionally operable to connect as business in described protecting tunnel group
After ingress receives described APS message, update the business of the described protecting tunnel group safeguarded
The state of corresponding span in table, when the state of calculating protecting tunnel group is Wait-to-Restore state, starts and waits
Recover intervalometer, after this intervalometer arrives, determine that protecting tunnel group state is duty, and by business
Flow from protection link switchover to active link.
Further, said system can also have the following characteristics that
Described link nodes, is additionally operable to switch life as the agreement on active link in described protecting tunnel group
Make receiving node receive after agreement switches order, be in pressure to west to sending instruction along link east
The APS message of the span of switch status；It is additionally operable to connect as business in described protecting tunnel group
After ingress receives described APS message, update the business of the described protecting tunnel group safeguarded
The state of corresponding span in table, determines that protecting tunnel group state is guard mode, and by Business Stream from work
Link switchover is to protection link.
Further, said system can also have the following characteristics that
Described link nodes, is additionally operable to as protecting the agreement on link to switch life in described protecting tunnel group
Make receiving node receive after agreement switches order, be in protection to west to sending instruction along link east
The APS message of the span of blocking；It is additionally operable to connect as business in described protecting tunnel group
After ingress receives described APS message, update the business of the described protecting tunnel group safeguarded
The state of corresponding span in table, determines that protecting tunnel group state is duty, and by Business Stream from protection
Link switchover is to active link.
In such scheme, ring net protection method is applicable to Steering formula looped network, make use of ITU-T G.8132
Looped network APS message technology, at aspect of performance, can ensure that completely within 50ms, simultaneously can
Being well matched with wrapping protection scheme, APS protocol command is switched completely can be in such scheme
Merge.When the operating path direction in ring-network topology figure changes, it is only necessary to update Service Access point
Traffic table configuration；If changing in Protection path direction topology, it is not necessary to the renewal to traffic table, thus
Greatly reduce configuration workload, improve degree of intelligence when network processes path direction topology changes.Business
Table configures in a static manner, it is not necessary to uses protocol negotiation to be updated, can save the network bandwidth and node merit
Consumption.
Accompanying drawing explanation
Fig. 1 a is Steering looped network protection schematic diagram in prior art；
Fig. 1 b is that in prior art, Steering looped network protection active link breaks down schematic diagram；
Fig. 2 is the schematic flow sheet of the method realizing looped network protection；
Steering looped network protection schematic diagram when Fig. 3 a is looped network protection normal condition in embodiment；
Steering looped network protection schematic diagram when Fig. 3 b is looped network protection active link fault in embodiment；
Steering looped network protection signal when Fig. 3 c is looped network protection active link fault recovery in embodiment
Figure；
Steering looped network protection signal when Fig. 3 d is that in embodiment, looped network protection APS protocol command is switched
Figure；
Fig. 4 is looped network handling process schematic diagram of looped network node when breaking down；
The handling process schematic diagram of looped network node when Fig. 5 is ring network fault recovery；
Fig. 6 is that looped network performs the handling process schematic diagram of looped network node when agreement switches order.
Detailed description of the invention
Method and system in this programme is applicable to Steering formula looped network.
As shown in Figure 2, it is achieved the method for looped network protection includes: at service access node, protecting tunnel is set
The traffic table of group；This traffic table is for recording the active link of described protecting tunnel group along Business Stream output side
State to each span of the node comprised and active link；Described protecting tunnel group link fault is sent out
Show node or receive the node transmission APS message switching order, in described protecting tunnel group
Other non-automatic pretection switch targets of messages node along described APS message sender to forward institute
Stating APS message, in described protecting tunnel group, service access node receives described automatic protection
After changing message, update the state of corresponding span in the traffic table of the described protecting tunnel group safeguarded, determine
Protecting tunnel group state also determines whether to perform link switchover.
Said method is applicable to multiple application situation, illustrates with multiple embodiments below.
Implement one
Link failure find nodal test to after link failure, Yan Dong, west to port to the adjacent node cycle
The transmission APS message of property, carrying out traffic table coupling, i.e. representing if not matching traffic table
This node is non-traffic access node, does not the most carry out other operation, if matching traffic table and mating
Source node and the mark of destination node to APS message, then it represents that this node is service access
Node, then be updated traffic table and the switching of decision-making protection group.
Non-link failure finds that node, after receiving the APS message that other node sends, is sentenced
Whether this node disconnected is the destination node of APS message, if it is, do not carry out this message
Forwarding, otherwise the direction of transfer along this message forwards this message.Further, carry out traffic table coupling,
If not matching traffic table i.e. represent that this node is non-traffic access node, the most do not carry out other operation,
If matching traffic table and matching the source node of APS message and the mark of destination node
Know, then it represents that this node is service access node, traffic table is updated and the switching of decision-making protection group.
So, it is switched to protect the method for link to include from active link by Business Stream during active link fault:
Described protecting tunnel group link fault discovery nodal test is to after active link fault, along link east
Direction and west disappear to sending the APS that instruction place, trouble point span is fault warning state
Breath, in described protecting tunnel group, other non-automatic pretection switch targets of messages node falls along described automatic protection
Change message sender to forward described APS message, in described protecting tunnel group service access joint
After point receives described APS message, update in the traffic table of the described protecting tunnel group safeguarded
The state of corresponding span, determines that protecting tunnel group state is guard mode, and by Business Stream from described work
Link switchover is to protection link.
Embodiment two:
Link failure recovery find nodal test to after link failure recovery, Yan Dong, west to port to adjacent
Node periodically sends APS message, carries out traffic table coupling, if the business of not matching
Table i.e. represents that this node is non-traffic access node, does not the most carry out other operation, if matching traffic table
And match the source node of APS message and the mark of destination node, then it represents that this node is
Service access node, then be updated traffic table and start Wait-to-Restore (Wait to Restore, letter
Claim WTR) intervalometer.
Non-link failure recovery finds that node is receiving the APS message that other node sends
After, it is judged that whether this node is the destination node of APS message, if it is, do not carry out this
The forwarding of message, otherwise the direction of transfer along this message forwards this message.Further, traffic table is carried out
Coupling, if not matching traffic table i.e. represent that this node is non-traffic access node, does not the most carry out other
Operation, if matching traffic table and matching source node and the destination node of APS message
Mark, then it represents that this node is service access node, is updated traffic table and starts WTR
Intervalometer.
When WTR intervalometer then after, service access node by Business Stream from protection link switchover to work
Link.
So, by Business Stream from the method for protection link switchover to active link after active link fault recovery
Including:
Described protecting tunnel group link fault recovery find nodal test to after active link fault, along chain
East, road is to the automatic protection indicating fault recovery point place span to be Wait-to-Restore state to transmission with west
Switching messages, in described protecting tunnel group other non-automatic pretection switch targets of messages node along described automatically
Pretection switch message sender is to forwarding described APS message, business in described protecting tunnel group
After access node receives described APS message, update the industry of the described protecting tunnel group safeguarded
The state of corresponding span in business table, when the state of calculating protecting tunnel group is Wait-to-Restore state, startup etc.
Intervalometer to be restored, after this intervalometer arrives, determines that protecting tunnel group state is duty, and by industry
Business stream is from protecting link switchover to active link.
Embodiment three
By agreement switch command triggers carry out link switchover time, agreement is switched order receiving node and is received association
After view switches order, Yan Dong, west periodically send APS message to port to adjacent node,
Carry out traffic table coupling, if not matching traffic table i.e. represent that this node is non-traffic access node, then
Do not carry out other operation, if matching traffic table and matching the source node of APS message
Mark with destination node, then it represents that this node is service access node, then be updated traffic table also
And the switching of decision-making protection group.
Non-agreement is switched order receiving node and is being received the APS message that other node sends
After, it is judged that whether this node is the destination node of APS message, if it is, do not carry out this
The forwarding of message, otherwise the direction of transfer along this message forwards this message.Further, traffic table is carried out
Coupling, if not matching traffic table i.e. represent that this node is non-traffic access node, does not the most carry out other
Operation, if matching traffic table and matching source node and the destination node of APS message
Mark, then it represents that this node is service access node, is updated traffic table and decision-making protection group
Switching.
In implementation one, switch command triggers by agreement and Business Stream is switched to protection from active link
The method of link includes: in described protecting tunnel group, the agreement on active link switches order receiving node receipts
After switching order to agreement, along link east to west to send instruction be in Forced Switch state across
The APS message of section, other non-automatic pretection switch targets of messages joint in described protecting tunnel group
Put along described APS message sender to forwarding described APS message, described tunnel
After service access node receives described APS message in protection group, update the described tunnel safeguarded
The state of corresponding span in the traffic table of pipe protection group, determines that protecting tunnel group state is guard mode, and
It is switched to protect link from active link by Business Stream.
In implementation two, switch command triggers by Business Stream from protecting link switchover to work by agreement
The method of link includes: protects the agreement on link to switch order receiving node in described protecting tunnel group and receives
After switching order to agreement, along link east to west to send instruction be in protection blocking state across
The APS message of section, other non-automatic pretection switch targets of messages joint in described protecting tunnel group
Put along described APS message sender to forwarding described APS message, described tunnel
After service access node receives described APS message in protection group, update the described tunnel safeguarded
The state of corresponding span in the traffic table of pipe protection group, determines that protecting tunnel group state is duty, and
By Business Stream from protection link switchover to active link.
The system realizing looped network protection includes constituting multiple link nodes of protecting tunnel group；Link nodes exists
As link failure, protecting tunnel group finds that node, non-link failure find node, link failure recovery
Find that node, non-link failure recovery find node, agreement switches order receiving node, non-agreement is switched
Performing when order receiving node, service access node to operate accordingly in said method, here is omitted.
It is illustrated with specific embodiment below.
Such as Fig. 3 a, Steering looped network protection configures Steering looped network protection group, and depends on work
Make tunnel the equipment configuration service table in order of process, in whole ring topological diagram, every equipment distributes one
Node ID uniquely identifies, and enables APS agreement.
Setting up Steering looped network protection environment, each node on ring is come only by one node ID of distribution
One mark.Two-way services, the operating path 1<->2<->3<->4 of Business Stream, ring is configured at node 1,4
Net Protection path is: 1<->6<->5<->4<->3<->2<->1, and configures the protection of looped network steering type
Group, protects operative orientation Business Stream.Service Access point 1,4 configuration service table, configuring of traffic table
Entirely depend on the node of operating path process, such as: the traffic table of node 1 is 1,2,3,4, node 4
Traffic table be 4,3,2,1.Each node in network environment enables APS agreement, it is assumed that inverse
Clockwise is WEST direction, is EAST direction clockwise.
The form being embodied as middle APS message is defined in ITU-T G.8132 standard, comprises purpose joint
Point ID, source node ID, solicited status.
Specific embodiment one
As shown in Figure 3 b, fault is produced between active link node 2 and node 3.
APS message Node Processing Method along WEST direction includes:
Link failure finds that node 2 detects that on link failure tailing edge ring, WEST direction port is to adjacent segments
The transmission APS message of property dot cycle, indicating destination node in APS message is node 3, and source node is joint
Point 2, between node 2 and node 3, the state of span is failure state (SF), carries out according to traffic table
Source node and the coupling of destination node, mate unsuccessful do not carry out other process.
After non-link failure finds that node 1 receives the APS message that node 2 sends, it is judged that whether this node is
The destination node of APS message, it is judged that result for not, continue along WEST direction forwarding this
Message, carries out the coupling of source node and destination node, source node and destination node all in industry according to traffic table
In business table, node 1 updates the state of each span of traffic table, and according to the priority of status ratio of each span
Relatively, protecting tunnel group state is obtained.
After non-link failure finds that node 6 receives the APS message that node 1 sends, it is judged that whether this node is
The destination node of APS message, it is judged that result for not, continue along WEST direction forwarding this
Message, carries out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other behaviour
Make.
After non-link failure finds that node 5 receives the APS message that node 6 sends, it is judged that whether this node is
The destination node of APS message, it is judged that result for not, continue along WEST direction forwarding this
Message, carries out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other behaviour
Make.
After non-link failure finds that node 4 receives the APS message that node 5 sends, it is judged that whether this node is
The destination node of APS message, it is judged that result for not, continue along WEST direction forwarding this
Message, carries out the coupling of source node and destination node, source node and destination node all in industry according to traffic table
In business table, node 4 updates the state of each span of traffic table, and according to the priority of status ratio of each span
Relatively, protecting tunnel group state is obtained.
After link failure finds that node 3 receives the APS message that node 4 sends, it is judged that whether this node is certainly
The destination node of dynamic pretection switch message, it is judged that result is yes, does not carries out the forwarding of this message.According to industry
Business table carries out the coupling of source node and destination node, mate unsuccessful do not carry out other operation.
Business Stream is switched to protect from active link by node 1 and node 4 according to protecting tunnel group Determines
Protect link.
APS message Node Processing Method along EAST direction includes:
Link failure finds that node 3 detects that on link failure tailing edge ring, EAST direction port is to adjacent segments
The transmission APS message of property dot cycle, indicating destination node in APS message is node 2, and source node is joint
Point 3, between node 2 and node 3, the state of span is failure state (SF), carries out according to traffic table
Source node and the coupling of destination node, mate unsuccessful do not carry out other process.
After non-link failure finds that node 4 receives the APS message that node 3 sends, it is judged that whether this node is
The destination node of APS message, it is judged that result for not, continue along EAST direction forwarding this
Message, carries out the coupling of source node and destination node, source node and destination node all in industry according to traffic table
In business table, node 4 updates the state of each span of traffic table, and according to the priority of status ratio of each span
Relatively, protecting tunnel group state is obtained.
After non-link failure finds that node 5 receives the APS message that node 4 sends, it is judged that whether this node is
The destination node of APS message, it is judged that result for not, continue along EAST direction forwarding this
Message, carries out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other behaviour
Make.
After non-link failure finds that node 6 receives the APS message that node 5 sends, it is judged that whether this node is
The destination node of APS message, it is judged that result for not, continue along EAST direction forwarding this
Message, carries out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other behaviour
Make.
After non-link failure finds that node 1 receives the APS message that node 6 sends, it is judged that whether this node is
The destination node of APS message, it is judged that result for not, continue along EAST direction forwarding this
Message, carries out the coupling of source node and destination node, source node and destination node all in industry according to traffic table
In business table, node 1 updates the state of each span of traffic table, and according to the priority of status ratio of each span
Relatively, protecting tunnel group state is obtained.
After link failure finds that node 2 receives the APS message that node 1 sends, it is judged that whether this node is certainly
The destination node of dynamic pretection switch message, it is judged that result is yes, does not carries out the forwarding of this message.According to industry
Business table carries out the coupling of source node and destination node, mate unsuccessful do not carry out other operation.
Business Stream is switched to protect from active link by node 1 and node 4 according to protecting tunnel group Determines
Protect link.
Specific embodiment two
As shown in Figure 3 c, fault recovery between active link node 2 and node 3.
APS message Node Processing Method along WEST direction includes:
After link failure recovery finds that node 2 detects link failure recovery, carry out WTR state, edge
On ring, WEST direction port periodically sends APS message to adjacent node, indicates in APS message
Destination node is node 3, and source node is node 2, and between node 2 and node 3, the state of span is for waiting
Recover (WTR) state, carry out the coupling of source node and destination node according to traffic table, mate unsuccessful
Do not carry out other to process.
After non-link failure recovery finds that node 1 receives the APS message that node 2 sends, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along WEST direction
Send out this message, carry out the coupling of source node and destination node, source node and destination node according to traffic table equal
In traffic table, node 1 updates the state of each span of traffic table, and according to the state prior of each span
Level compares, and obtains protecting tunnel group state, and starts WTR intervalometer.
After non-link failure recovery finds that node 6 receives the APS message that node 1 sends, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along WEST direction
Send out this message, carry out the coupling of source node and destination node according to traffic table, mate and unsuccessful do not carry out it
Its operation.
After non-link failure recovery finds that node 5 receives the APS message that node 6 sends, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along WEST direction
Send out this message, carry out the coupling of source node and destination node according to traffic table, mate and unsuccessful do not carry out it
Its operation.
After non-link failure recovery finds that node 4 receives the APS message that node 5 sends, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along WEST direction
Send out this message, carry out the coupling of source node and destination node, source node and destination node according to traffic table equal
In traffic table, node 4 updates the state of each span of traffic table, and according to the state prior of each span
Level compares, and obtains protecting tunnel group state, and starts WTR intervalometer.
After link failure recovery finds that node 3 receives the APS message that node 4 sends, it is judged that whether this node
Destination node for APS message, it is judged that result is yes, does not carries out the forwarding of this message.Root
Carry out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other operation.
After link failure recovery finds that node 3 detects link failure recovery, enter WTR state, edge
On ring, WEST direction port periodically sends APS message to adjacent node, indicates in APS message
Destination node is node 2, and source node is node 3, and between node 2 and node 3, the state of span is for waiting
Recover (WTR) state, carry out the coupling of source node and destination node according to traffic table, mate unsuccessful
Do not carry out other to process.
After link failure recovery finds that node 2 receives the APS message that node 3 sends, it is judged that whether this node
Destination node for APS message, it is judged that result is yes, does not carries out the forwarding of this message.Root
Carry out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other operation.
WTR intervalometer then after, node 1 and node 4 according to protecting tunnel group Determines by Business Stream
It is switched to protect link from active link.
APS message Node Processing Method along EAST direction includes:
Link failure recovery finds that node 2 detects EAST direction port on link failure recovery tailing edge ring
Periodically send APS message to adjacent node, indicating destination node in APS message is node 3, source
Node is node 2, and between node 2 and node 3, the state of span is Wait-to-Restore (WTR) state,
Carry out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other process.
After link failure recovery finds that node 3 receives the APS message that node 2 sends, it is judged that whether this node
Destination node for APS message, it is judged that result is yes, does not carries out the forwarding of this message.Root
Carry out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other operation.
After link failure recovery finds that node 3 detects link failure recovery, enter WTR state, edge
On ring, EAST direction port periodically sends APS message to adjacent node, indicates mesh in APS message
Node be node 2, source node is node 3, between node 2 and node 3 state of span for wait extensive
Multiple (WTR) state, carries out the coupling of source node and destination node according to traffic table, mate unsuccessful not
Carry out other to process.
After non-link failure recovery finds that node 4 receives the APS message that node 3 sends, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along EAST direction
Send out this message, carry out the coupling of source node and destination node, source node and destination node according to traffic table equal
In traffic table, node 4 updates the state of each span of traffic table, and according to the state prior of each span
Level compares, and obtains protecting tunnel group state, and starts WTR intervalometer.
After non-link failure recovery finds that node 5 receives the APS message that node 4 sends, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along EAST direction
Send out this message, carry out the coupling of source node and destination node according to traffic table, mate and unsuccessful do not carry out it
Its operation.
After non-link failure recovery finds that node 6 receives the APS message that node 5 sends, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along EAST direction
Send out this message, carry out the coupling of source node and destination node according to traffic table, mate and unsuccessful do not carry out it
Its operation.
After non-link failure recovery finds that node 1 receives the APS message that node 6 sends, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along EAST direction
Send out this message, carry out the coupling of source node and destination node, source node and destination node according to traffic table equal
In traffic table, node 1 updates the state of each span of traffic table, and according to the state prior of each span
Level compares, and obtains protecting tunnel group state, and starts WTR intervalometer.
After link failure recovery finds that node 2 receives the APS message that node 1 sends, it is judged that whether this node
Destination node for APS message, it is judged that result is yes, does not carries out the forwarding of this message.Root
Carry out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other operation.
Business Stream is switched to protect from active link by node 1 and node 4 according to protecting tunnel group Determines
Protect link.
WTR intervalometer then after, node 1 and node 4 according to protecting tunnel group Determines by Business Stream
It is switched to protect link from active link.
Specific embodiment 3
As shown in Figure 3 d, active link node 2 receives agreement Forced Switch order.
APS message Node Processing Method along WEST direction includes:
Agreement is switched order receiving node 2 and is received after agreement switches order, WEST direction end along ring
Mouth periodically sends APS message to adjacent node, and indicating destination node in APS message is node 3,
Source node is node 2, and between node 2 and node 3, the state of span is Forced Switch (FS), according to
Traffic table carries out the coupling of source node and destination node, mate unsuccessful do not carry out other process.
After non-agreement switches the APS message that order receiving node 1 receives node 2 transmission, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along WEST direction
Send out this message, carry out the coupling of source node and destination node, source node and destination node according to traffic table equal
In traffic table, node 1 updates the state of each span of traffic table, and according to the state prior of each span
Level compares, and obtains protecting tunnel group state.
After non-agreement switches the APS message that order receiving node 6 receives node 1 transmission, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along WEST direction
Send out this message, carry out the coupling of source node and destination node according to traffic table, mate and unsuccessful do not carry out it
Its operation.
After non-agreement switches the APS message that order receiving node 5 receives node 6 transmission, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along WEST direction
Send out this message, carry out the coupling of source node and destination node according to traffic table, mate and unsuccessful do not carry out it
Its operation.
After non-agreement switches the APS message that order receiving node 4 receives node 5 transmission, it is judged that this node is
The no destination node for APS message, it is judged that result, for not, continues to turn along WEST direction
Send out this message, carry out the coupling of source node and destination node, source node and destination node according to traffic table equal
In traffic table, node 4 updates the state of each span of traffic table, and according to the state prior of each span
Level compares, and obtains protecting tunnel group state.
After non-agreement switches the APS message that order receiving node 3 receives node 4 transmission, it is judged that this node is
The no destination node for APS message, it is judged that result is yes, does not carries out the forwarding of this message.
Carry out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other operation.
APS message Node Processing Method along EAST direction includes:
Agreement is switched order receiving node 2 and is received after agreement switches order, EAST direction end along ring
Mouth periodically sends APS message to adjacent node, and indicating destination node in APS message is node 3,
Source node is node 2, and between node 2 and node 3, the state of span is Forced Switch (FS), according to
Traffic table carries out the coupling of source node and destination node, mate unsuccessful do not carry out other process.
After non-agreement switches the APS message that order receiving node 3 receives node 2 transmission, it is judged that this node is
The no destination node for APS message, it is judged that result is yes, does not carries out the forwarding of this message.
Carry out the coupling of source node and destination node according to traffic table, mate unsuccessful do not carry out other operation.
Each embodiment is described below in the way of method flow.
As shown in Figure 4, when looped network breaks down, the handling process of each node:
Step S401-1, looped network in normal state, there occurs active link fault；
Step S402-1, the nodal test of looped network breaks down to adjacent link；
Step S403-1, detects that the node of the link failure east along ring, west are periodically sent out to port
Sending failure notification message, node enters step S404-1 simultaneously；
Step S403-2, node on the ring receives failure notification message from east or west to port
Step S403-3, it is right that destination node ID in node extraction message and the node ID of this node are carried out
Ratio；
The node ID of step S403-4, destination node ID in message and this node, message is from separately
An outer port forwards this message, and enters step S404-1；
The node ID of step S403-5, destination node ID in message and this node is equal, and message terminates,
And enter step S404-1；
Step S404-1, carries out source node ID and destination node ID according to the traffic table that equipment configures
Coupling；
Step S405-1, node matching success, carry out decision-making protection group according to the priority state of APS
Switching and the renewal of traffic table span state；Mate unsuccessful, do not process.
During as it is shown in figure 5, ring network fault is recovered, the handling process of each node:
Step S501-1, looped network active link fault recovery；
Step S502-1, the nodal test of looped network is to adjacent link fault recovery；
Step S503-1, detects the node of the link failure recovery east along ring, west to port periodically
Transmission fault recovery notice message, simultaneously node enter step S504-1；
Step S503-2, node on the ring receives fault recovery notice message from east or west to port
Step S503-3, it is right that destination node ID in node extraction message and the node ID of this node are carried out
Ratio；
The node ID of step S503-4, destination node ID in message and this node, message from
Another one port forwards this message, and enters step S504-1；
The node ID of step S503-5, destination node ID in message and this node is equal, and message is eventually
Knot, and enter step S504-1；
Step S504-1, carries out source node ID and destination node ID according to the traffic table that equipment configures
Coupling；
Step S505-1, node matching success, carry out decision business table according to the priority state of APS
Updating and the startup of WTR intervalometer of span shape；Mate unsuccessful, do not process；
Step S506-1, after WTR intervalometer arrives, notifies protection group switchback, and Business Stream returns to work
Link.
As shown in Figure 6, when looped network execution agreement switches order, the handling process of each node:
Step S601-1, looped network is in normal state；
Step S602-1, selects node on the ring to perform order switching operation；
Step S603-1, performs the node switched of APS protocol command east along ring, west to the port cycle
Property transmission command request switch message, simultaneously node enter step S604-1；
Step S603-2, node on the ring receives command request to port switch message from east or west
Step S603-3, it is right that destination node ID in node extraction message and the node ID of this node are carried out
Ratio；
The node ID of step S603-4, destination node ID in message and this node, message is from separately
An outer port forwards this message, and enters step S604-1；
The node ID of step S603-5, destination node ID in message and this node is equal, and message terminates,
And enter step S604-1；
Step S604-1, carries out source node ID and destination node ID according to the traffic table that equipment configures
Coupling；
Step S605-1, node matching success, carry out decision-making protection group according to the priority state of APS
Switching and the renewal of traffic table span state；Mate unsuccessful, do not process.
Such scheme increases the configuration of traffic table at Service Access point, it is not necessary to the ring that each equipment is complete
Figure, it is achieved Steering looped network protection.
Knowable to being analyzed above, this programme does not utilize protocol negotiation ring figure and the whole network static configuration ring figure,
With traditional loopback (Wrapping) protection scheme is completely compatible, therefore this programme can be applied completely
In one physical rings, existing Wrapping protection has again the scene that Steering protects, and certain this programme also may be used
To apply under scenes such as realizing multi service access, multipoint fault and recovery in physical rings
It should be noted that in the case of not conflicting, the embodiment in the application and the spy in embodiment
Levying can mutual combination in any.
Certainly, the present invention also can have other various embodiments, spiritual and essence without departing substantially from the present invention
In the case of, those of ordinary skill in the art can make various corresponding change and deformation according to the present invention,
But these change accordingly and deform the protection domain that all should belong to appended claims of the invention.
One of ordinary skill in the art will appreciate that all or part of step in said method can pass through program
Instructing related hardware to complete, described program can be stored in computer-readable recording medium, as read-only
Memorizer, disk or CD etc..Alternatively, all or part of step of above-described embodiment can also use
One or more integrated circuits realize.Correspondingly, each module/unit in above-described embodiment can use
The form of hardware realizes, it would however also be possible to employ the form of software function module realizes.The present invention is not restricted to appoint
The combination of the hardware and software of what particular form.
Claims (10)
1. the method realizing looped network protection, it is adaptable to Steering formula looped network, wherein,
Arrange the traffic table of protecting tunnel group at service access node, the configuration of traffic table places one's entire reliance upon work
Make the node of path process；This traffic table is for recording the active link of described protecting tunnel group along Business Stream
Node that outbound course is comprised and the state of each span of active link；
Described protecting tunnel group link fault discovery node or receive is switched the node of order and is sent automatically
Pretection switch message, in described protecting tunnel group, other non-automatic pretection switch targets of messages node is along described
APS message sender is to forwarding described APS message, in described protecting tunnel group
After service access node receives described APS message, update the described protecting tunnel group safeguarded
Traffic table in the state of corresponding span, determine protecting tunnel group state and determine whether to perform link switchover.
2. the method for claim 1, it is characterised in that
It is switched to protect the method for link to include from active link by Business Stream during active link fault:
Described protecting tunnel group link fault discovery nodal test is to after active link fault, along link east
Direction and west disappear to sending the APS that instruction place, trouble point span is fault warning state
Breath, in described protecting tunnel group, other non-automatic pretection switch targets of messages node falls along described automatic protection
Change message sender to forward described APS message, in described protecting tunnel group service access joint
After point receives described APS message, update in the traffic table of the described protecting tunnel group safeguarded
The state of corresponding span, determines that protecting tunnel group state is guard mode, and by Business Stream from described work
Link switchover is to protection link；
Wherein, clockwise, west is to for counterclockwise for Dong Fangxiangwei.
3. the method for claim 1, it is characterised in that
After active link fault recovery, Business Stream is included from the method for protection link switchover to active link:
Described protecting tunnel group link fault recovery find nodal test to after active link fault recovery,
Fault recovery point place span is indicated to be Wait-to-Restore state automatic to west to transmission along link east
Pretection switch message, in described protecting tunnel group, other non-automatic pretection switch targets of messages node is along described
APS message sender is to forwarding described APS message, in described protecting tunnel group
After service access node receives described APS message, update the described protecting tunnel group safeguarded
Traffic table in the state of corresponding span, calculate the state of protecting tunnel group when being Wait-to-Restore state, open
Dynamic Wait-to-Restore intervalometer, after this intervalometer arrives, determines that protecting tunnel group state is duty, and
By Business Stream from protection link switchover to active link；
Wherein, clockwise, west is to for counterclockwise for Dong Fangxiangwei.
4. the method for claim 1, it is characterised in that
Switch command triggers by agreement and Business Stream is switched to protect from active link the method bag of link
Include:
In described protecting tunnel group, the agreement on active link is switched order receiving node and is received agreement and switch life
After order, span automatic that be in Forced Switch state is indicated to protect to west to transmission along link east
Switching messages, in described protecting tunnel group other non-automatic pretection switch targets of messages node along described automatically
Pretection switch message sender is to forwarding described APS message, business in described protecting tunnel group
After access node receives described APS message, update the industry of the described protecting tunnel group safeguarded
In business table, the state of corresponding span, determines that protecting tunnel group state is guard mode, and by Business Stream from work
Make link switchover to protection link；
Wherein, clockwise, west is to for counterclockwise for Dong Fangxiangwei.
5. the method for claim 1, it is characterised in that
Command triggers is switched by Business Stream from the method bag of protection link switchover to active link by agreement
Include:
Described protecting tunnel group is protected the agreement on link switch order receiving node to receive agreement and switch life
After order, span automatic that be in protection blocking state is indicated to protect to west to transmission along link east
Switching messages, in described protecting tunnel group other non-automatic pretection switch targets of messages node along described automatically
Pretection switch message sender is to forwarding described APS message, business in described protecting tunnel group
After access node receives described APS message, update the industry of the described protecting tunnel group safeguarded
In business table, the state of corresponding span, determines that protecting tunnel group state is duty, and by Business Stream from guarantor
Protect link switchover to active link；
Wherein, clockwise, west is to for counterclockwise for Dong Fangxiangwei.
6. the system realizing looped network protection, it is adaptable to Steering formula looped network, wherein, described system
Including the multiple link nodes constituting protecting tunnel group；
Described link nodes, when as service access node, arranges tunnel at service access node and protects
Protecting the traffic table of group, the configuration of traffic table places one's entire reliance upon the node of operating path process；This traffic table is used
The node comprised along Business Stream outbound course in the active link recording described protecting tunnel group and work
The state of each span of link；It is additionally operable to find that node or agreement switch order receiving node as link failure
Time send APS message；It is additionally operable to disappear as non-automatic pretection switch in described protecting tunnel group
Along described APS message sender to forwarding described APS to disappear during breath destination node
Breath；After receiving described APS message when being additionally operable to as service access node, update and safeguarded
Described protecting tunnel group traffic table in the state of corresponding span, determine protecting tunnel group state and determine
Whether perform link switchover.
7. system as claimed in claim 6, it is characterised in that
Described link nodes, is additionally operable to arrive as described protecting tunnel group link fault discovery nodal test
After active link fault, trouble point place span is indicated to be fault accuse to west to transmission along link east
The APS message of alert state；It is additionally operable to receive described automatic protection as service access node
After changing message, update the state of corresponding span in the traffic table of the described protecting tunnel group safeguarded, determine
Protecting tunnel group state is guard mode, and is switched to protect link from described active link by Business Stream；
Wherein, clockwise, west is to for counterclockwise for Dong Fangxiangwei.
8. system as claimed in claim 6, it is characterised in that
Described link nodes, is additionally operable to find node inspection as described protecting tunnel group link fault recovery
After measuring active link fault recovery, indicate fault recovery point place to west to transmission along link east
Span is the APS message of Wait-to-Restore state；It is additionally operable to as industry in described protecting tunnel group
After business access node receives described APS message, the described protecting tunnel group that renewal is safeguarded
The state of corresponding span in traffic table, when the state of calculating protecting tunnel group is Wait-to-Restore state, starts
Wait-to-Restore intervalometer, after this intervalometer arrives, determines that protecting tunnel group state is duty, and will
Business Stream is from protecting link switchover to active link；
Wherein, clockwise, west is to for counterclockwise for Dong Fangxiangwei.
9. system as claimed in claim 6, it is characterised in that
Described link nodes, is additionally operable to switch life as the agreement on active link in described protecting tunnel group
Make receiving node receive after agreement switches order, be in pressure to west to sending instruction along link east
The APS message of the span of switch status；It is additionally operable to connect as business in described protecting tunnel group
After ingress receives described APS message, update the business of the described protecting tunnel group safeguarded
The state of corresponding span in table, determines that protecting tunnel group state is guard mode, and by Business Stream from work
Link switchover is to protection link；
Wherein, clockwise, west is to for counterclockwise for Dong Fangxiangwei.
10. system as claimed in claim 6, it is characterised in that
Described link nodes, is additionally operable to as protecting the agreement on link to switch life in described protecting tunnel group
Make receiving node receive after agreement switches order, be in protection to west to sending instruction along link east
The APS message of the span of blocking；It is additionally operable to connect as business in described protecting tunnel group
After ingress receives described APS message, update the business of the described protecting tunnel group safeguarded
The state of corresponding span in table, determines that protecting tunnel group state is duty, and by Business Stream from protection
Link switchover is to active link；
Wherein, clockwise, west is to for counterclockwise for Dong Fangxiangwei.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110179643.3A CN102857316B (en) | 2011-06-29 | 2011-06-29 | A kind of method and system realizing source looped network protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110179643.3A CN102857316B (en) | 2011-06-29 | 2011-06-29 | A kind of method and system realizing source looped network protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102857316A CN102857316A (en) | 2013-01-02 |
| CN102857316B true CN102857316B (en) | 2016-12-07 |
Family
ID=47403533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110179643.3A Expired - Fee Related CN102857316B (en) | 2011-06-29 | 2011-06-29 | A kind of method and system realizing source looped network protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102857316B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104683207B (en) * | 2013-12-02 | 2018-02-09 | 上海诺基亚贝尔股份有限公司 | Method and apparatus for the node of MPLS TP ring topology |
| CN105264799B (en) * | 2014-05-08 | 2018-11-16 | 华为技术有限公司 | Method, node and the control equipment of pretection switch |
| CN106452817B (en) * | 2015-08-12 | 2019-05-31 | 中国电信股份有限公司 | Relaying configuration management method and system |
| CN106572024A (en) * | 2015-10-09 | 2017-04-19 | 中兴通讯股份有限公司 | Method and apparatus for preventing flow storm caused by network shared ring protection |
| CN106921568B (en) * | 2015-12-26 | 2020-04-21 | 华为技术有限公司 | Network protection method and device |
| CN106789627B (en) * | 2016-11-30 | 2019-11-01 | 瑞斯康达科技发展股份有限公司 | A kind of maintaining method and device of linear protection group |
| CN111431786B (en) * | 2020-03-17 | 2021-07-27 | 华信塞姆（成都）科技有限公司 | Steering mode ring protection method of Flexe ring network in SPN |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1371188A (en) * | 2002-03-19 | 2002-09-25 | 北京邮电大学 | Protection method based on business in optical network |
| CN101447848A (en) * | 2007-11-28 | 2009-06-03 | 华为技术有限公司 | Method and device for realizing ring network protection |
| US7596313B1 (en) * | 2001-07-20 | 2009-09-29 | Meriton Netowrks Us Inc. | Method and apparatus for processing protection switching mechanism in optical channel shared protection rings |
| CN101599862A (en) * | 2009-06-30 | 2009-12-09 | 中兴通讯股份有限公司 | Transmit multiprotocol label switching looped network protection Maintenance Entity collocation method and device |
| CN101626272A (en) * | 2008-07-10 | 2010-01-13 | 中兴通讯股份有限公司 | Method for realizing error connection prevention in optical network |
| CN101662329A (en) * | 2008-08-29 | 2010-03-03 | 华为技术有限公司 | Switching method, network nodes and network system |
| CN101702663A (en) * | 2009-11-11 | 2010-05-05 | 华为技术有限公司 | Method for updating ring network topology information, device and system thereof |
| CN101986620A (en) * | 2010-11-01 | 2011-03-16 | 中兴通讯股份有限公司 | Rapid switching method, device and system of source-routed ring protection |
-
2011
- 2011-06-29 CN CN201110179643.3A patent/CN102857316B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7596313B1 (en) * | 2001-07-20 | 2009-09-29 | Meriton Netowrks Us Inc. | Method and apparatus for processing protection switching mechanism in optical channel shared protection rings |
| CN1371188A (en) * | 2002-03-19 | 2002-09-25 | 北京邮电大学 | Protection method based on business in optical network |
| CN101447848A (en) * | 2007-11-28 | 2009-06-03 | 华为技术有限公司 | Method and device for realizing ring network protection |
| CN101626272A (en) * | 2008-07-10 | 2010-01-13 | 中兴通讯股份有限公司 | Method for realizing error connection prevention in optical network |
| CN101662329A (en) * | 2008-08-29 | 2010-03-03 | 华为技术有限公司 | Switching method, network nodes and network system |
| CN101599862A (en) * | 2009-06-30 | 2009-12-09 | 中兴通讯股份有限公司 | Transmit multiprotocol label switching looped network protection Maintenance Entity collocation method and device |
| CN101702663A (en) * | 2009-11-11 | 2010-05-05 | 华为技术有限公司 | Method for updating ring network topology information, device and system thereof |
| CN101986620A (en) * | 2010-11-01 | 2011-03-16 | 中兴通讯股份有限公司 | Rapid switching method, device and system of source-routed ring protection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102857316A (en) | 2013-01-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102857316B (en) | A kind of method and system realizing source looped network protection | |
| US8886831B2 (en) | System and methodology for fast link failover based on remote upstream failures | |
| EP2425632B1 (en) | Virtual links in a routed ethernet mesh network | |
| CN101364926B (en) | Method and apparatus for network protection | |
| US10326692B2 (en) | Apparatus and method for establishing a repair path | |
| EP1482694B1 (en) | Virtual private network fault tolerance | |
| EP2087712B1 (en) | Method and apparatus for computing alternate multicast/broadcast paths in a routed network | |
| US9203732B2 (en) | Recovery of traffic in a connection-oriented network | |
| US8441923B2 (en) | Communication path providing method and communication apparatus | |
| JP2017520997A (en) | Control of protection switching in telecommunication networks | |
| JP2013506362A (en) | Data transfer technology in computer networks | |
| JP5521663B2 (en) | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD | |
| CN103354521B (en) | The optimization method of a kind of LSP based on LDP renewal and device | |
| CN102638389A (en) | Redundancy backup method and system of TRILL (Transparent Interconnection over Lots of Links) network | |
| JP2009303092A (en) | Network equipment and line switching method | |
| US20140219080A1 (en) | Method and apparatus for interworking protection switching | |
| WO2013049981A1 (en) | Hybrid ring network protection method and system based on shared path | |
| EP2658177B1 (en) | Method for detecting tunnel faults and traffic engineering node | |
| CN102238067B (en) | Switching method and device on Rapid Ring Protection Protocol (RRPP) ring | |
| CN101160865A (en) | Multicast service path protection system and method | |
| US10033573B2 (en) | Protection switching method, network, and system | |
| JP5618946B2 (en) | Communication apparatus and communication system | |
| CN102487348A (en) | Method and system for realizing looped network uplink protection | |
| EP2573977A1 (en) | Subnet protection method and device for transport multi-protocol label switching (tmpls) network | |
| CN102404228B (en) | GR processing method and equipment based on OSPF protocol |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20190629 |