CN104283793B - A kind of traffic engineering tunnel information issuing method and device - Google Patents
A kind of traffic engineering tunnel information issuing method and device Download PDFInfo
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- CN104283793B CN104283793B CN201410560127.9A CN201410560127A CN104283793B CN 104283793 B CN104283793 B CN 104283793B CN 201410560127 A CN201410560127 A CN 201410560127A CN 104283793 B CN104283793 B CN 104283793B
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Abstract
The present invention provides a kind of TE tunnel of traffic engineering information issuing method and device, and this method includes：Calculate the link result for each link that all traffic engineering tunnels are excluded between local node equipment and other each node devices；All node equipment identifications in the link result filter out available traffic engineering tunnel from all traffic engineering tunnels, regard the available traffic engineering tunnel using the local node equipment as Ingress node equipment as effective traffic engineering tunnel in all traffic engineering tunnels；The tunnel information of effective traffic engineering tunnel is published to the neighbor node equipment of the local node equipment.The invention can ensure that node device issues effective MPLS traffic engineering tunnels information, so as to avoid node device from occurring the situation of mistake when carrying out router-level topology.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of TE (Traffic Engineering, traffic engineering) tunnel
Road information issuing method and device.
Background technology
MPLS (Multi-Protocol Label Switching, multiprotocol label switching) TE can be for solution load
Congestion problems caused by unbalanced.MPLS traffic engineering tunnels are specified or CSPF (Constrained shortest by user
Path tree, the shortest-path first algorithm based on constraint) calculate, generation meets bandwidth and the transmission road of other particular/special requirements
Footpath, and retain bandwidth resources on the path and distribute label, so as to set up the TE end to end connected by multiple node devices
Tunnel.After the foundation of MPLS traffic engineering tunnels, flow will not be forwarded automatically by MPLS traffic engineering tunnels, but need MPLS TE's
MPLS traffic engineering tunnels are directly connected to Ingress (entrance) node devices into tunnel Ingress nodes as one and Egress (goes out
Mouthful) link of node, added in LSA (Link-State Advertisement, LSA) and it is published to IGP
In (Interior Gateway Protocol, Interior Gateway Protocol) route, MPLS traffic engineering tunnels are allowed to participate in the meter of IGP routes
Calculate so that flow can be forwarded by MPLS traffic engineering tunnels.
But in actual networking, have a various abnormal conditions, such as neighbor node equipment is and network
Disconnect, but the LSA of the neighbor node equipment also retains on each node device in a network, if node device has issued bag
The MPLS traffic engineering tunnels of the neighbor node equipment are included, and because the MPLS traffic engineering tunnels are actually unavailable, so that route can be caused to count
Calculate existing mistake.
The content of the invention
In view of this, solve to go out in node device the invention provides a kind of traffic engineering tunnel information issuing method and device
During existing abnormal conditions, also retain because of its LSA on each node device in a network so that other node devices have been issued including being somebody's turn to do
The disabled MPLS traffic engineering tunnels of reality of abnormal nodes equipment, and then cause the problem of mistake occurs in router-level topology.
The present invention provides a kind of TE tunnel of traffic engineering information issuing method, wherein, methods described includes：
The link result for each link that all traffic engineering tunnels are excluded between local node equipment and other each node devices is calculated,
The link result includes all node equipment identifications on each link；
All node equipment identifications in the link result filter out available TE tunnels from all traffic engineering tunnels
Road, by the available traffic engineering tunnel using the local node equipment as Ingress node equipment as effective in all traffic engineering tunnels
Traffic engineering tunnel；
The tunnel information of effective traffic engineering tunnel is published to the neighbor node equipment of the local node equipment.
The present invention also provides a kind of TE tunnel of traffic engineering information delivery apparatus, and described device includes：
First link calculation unit, all TE tunnels are excluded for calculating between local node equipment and other each node devices
The link result of each link in road, the link result includes all node equipment identifications on each link；
Effective Tunnel testing unit, for all node equipment identifications in the link result from all TE
Available traffic engineering tunnel is filtered out in tunnel, the available traffic engineering tunnel using the local node equipment as Ingress node equipment is regard as institute
State effective traffic engineering tunnel in all traffic engineering tunnels；
Effective tunnel release unit, for the tunnel information of effective traffic engineering tunnel to be published into the local node equipment
Neighbor node equipment.
The traffic engineering tunnel information issuing method and device that the present invention is provided are before issue MPLS traffic engineering tunnel information, in advance
By calculating the link result for each link that all traffic engineering tunnels are discharged between local node equipment and other each node devices, according to
Link result detects effective traffic engineering tunnel, and the tunnel information of effective traffic engineering tunnel is published to the neighbours of the local node equipment
Node device, it is ensured that node device issues effective mpls-te tunnel information, so as to avoid node device from carrying out route meter
Occurs the situation of mistake during calculation.
Brief description of the drawings
Fig. 1 is the network environment schematic diagram that the embodiment of the present invention is applied；
Fig. 2 is traffic engineering tunnel information issuing method schematic flow sheet in the embodiment of the present invention；
Fig. 3 is the hardware structure signal of local node equipment where traffic engineering tunnel information delivery apparatus in the embodiment of the present invention
Figure；
Fig. 4 is the logical construction schematic diagram of traffic engineering tunnel information delivery apparatus in the embodiment of the present invention；
Fig. 5 is the logical construction schematic diagram of the first link calculation unit in the embodiment of the present invention；
Fig. 6 is the logical construction schematic diagram of effective Tunnel testing unit in the embodiment of the present invention.
Embodiment
At present, TE can combine the technologies such as MPLS and set up tunnel to solve congestion problems caused by load imbalance.The present invention
Illustrated by taking widely used MPLS traffic engineering tunnels as an example, it is necessary to illustrate, the application, which is not precluded from other, to be tied
The technology that TE sets up traffic engineering tunnel is closed, such as the traffic engineering tunnel that TE combinations IP is set up.
In the prior art, after MPLS traffic engineering tunnels are set up, the MPLS traffic engineering tunnel information can be published to OSPF (Open
Shortest Path First, ospf), EIGRP (Enhanced Interior Gateway
Routing Protocol, strengthen IGRP) or ISIS (Intermediate system to
Intermediate system, link-state routing protocol) etc. IGP route in, allow MPLS traffic engineering tunnels participate in IGP route meter
Calculate, can so that flow forwarded by MPLS traffic engineering tunnels, to optimize the use of Internet resources, it is to avoid load imbalance and lead
The network congestion of cause.
Fig. 1 show the network environment schematic diagram that the embodiment of the present invention is applied, including local node equipment (RA) and
Other node devices (RB, RC, RD, RE and RF), wherein RB and RC are local node equipment RA neighbor node equipment.Separately
Outside, the MPLS set up a traffic engineering tunnel is respectively present between RA to RF and RB to RC, in RA and RB respectively by RA to RF
And the MPLS traffic engineering tunnel information that RB to RC is present is distributed to after neighbor node equipment, it is assumed that receiving destination node in RA is
RC flow, because RA knows the presence of this MPLS traffic engineering tunnels according to RB RB to the RC sent mpls-te tunnel, therefore can
So that the flow is forwarded on RB, the flow is forwarded to by RC by the MPLS traffic engineering tunnels that exist between RB to RC.However, false
If the OSPF configurations in RB are deleted, cause node device RE abnormal states, but the MPLS traffic engineering tunnels between the RB and RC
LSA has been advertised to each neighbor node, and notices other node devices into network by each neighbor node, and is retained in each node
In equipment, now in the prior art, because the MPLS traffic engineering tunnels of RB to the RC are actually unavailable, then in RA or other phases
Joint point device can then cause router-level topology the situation of mistake occur when calculating route.
Thus, the present invention provides a kind of traffic engineering tunnel information issuing method and device, by believing in issue mpls-te tunnel
Before breath, the link result of each link between local node equipment and other each node devices is calculated first, according to each chain
The link result on road detects effective traffic engineering tunnel using the local node equipment as Ingress node equipment, finally by effective TE
The tunnel information in tunnel is published to the neighbor node equipment of the local node equipment, to solve asking encountered in prior art
Topic.
Traffic engineering tunnel information issuing method provided by the present invention can be applied to the IGP agreements such as OSPF, EIGRP and ISIS
In, only it is further described through in the present embodiment by taking ospf protocol as an example, in other IGP scenes such as ISIS or EIGRP
Its lower operation principle can describe similar to this, and the present invention is not being repeated one by one.The processing of traffic engineering tunnel information issuing method of the present invention
Flow comprises the following steps as shown in Fig. 2 this method is particularly applicable in local node equipment：
Step 201, each link that all traffic engineering tunnels are excluded between local node equipment and other each node devices is calculated
Link result, the link result includes all node equipment identifications on each link；
In the embodiment of the present invention, each node device can be by sending the LSA with oneself state to neighbor node equipment
To notice the change of oneself state, the LSA includes node equipment identification (the OSPF Router for sending LSA node device
ID), and the node device last state.Each node device can preserve the section after the LSA of neighbor device issue is received
Whether the node equipment identification of point device and corresponding state, such as the node device state are " full ", with local node
Whether equipment room Link State is " up " etc..The LSA that node device can be issued according to each node device of preservation carries out topology
Calculate, if certain node device breaks down, its neighbor node equipment can be by the probe messages (hello packet) that periodically send
The node device of the failure is learnt, and the node device of the failure is excluded when calculating topology, to ensure the node for participating in calculating
Equipment is all that node device state is " full (state that neighbours have set up) ", and Link State is " up " between each node device
Enabled node equipment.
The MPLS traffic engineering tunnel information using itself as Ingress node equipment is distributed to neighbor node in local node equipment
Before equipment, for avoid when the MPLS traffic engineering tunnels have failed will its be distributed to neighbor node equipment, it is possible to use shortest path
The link result of each link is to verify the MPLS traffic engineering tunnels between footpath tree algorithm calculating local node equipment and other node devices
No is reachable effective MPLS traffic engineering tunnels, and is distributed to neighbours when the mpls-te tunnel is reachable effective MPLS traffic engineering tunnels
Node device.
Specifically, the LSA that each node device prestored first according to local node equipment is issued, is determined and local node
The normal enabled node equipment of link connection between equipment, the normal enabled node equipment of the link connection can be node device
State is " full ", and Link State is the node device of " up " between each node device.
Determining between local node equipment after the normal enabled node equipment of link connection, checking the local section
All MPLS traffic engineering tunnels existed between point device and other node devices, and exclude after the MPLS traffic engineering tunnels, and according to most short
Path tree algorithm (such as SPF algorithms) calculates each link of the local node equipment and each enabled node equipment room point-to-point
Link result, the link result includes all enabled node equipment on each link for calculating, and by all available
Cost (expense) summation for the link that node device is constituted.
For example, RA checks the MPLS traffic engineering tunnels using RA as Ingress node equipment as local node equipment in Fig. 1
The middle MPLS traffic engineering tunnel that there is RA to RF, then calculating local node equipment RA to other each nodes using SPF algorithms
During each link result between equipment, exclude the RA to the MPLS traffic engineering tunnels between RF, by local node equipment RA respectively with
RB, RC, RD, RE and RF carry out link calculation.It should be noted that when calculating RA to link result between RF, being calculated
Link result to exclude RA to the Cost of the RA-RE-RF drawn after the MPLS traffic engineering tunnels between RF point-to-point.
Step 202, all node equipment identifications in the link result are filtered out from all traffic engineering tunnels
Traffic engineering tunnel can be used, the available traffic engineering tunnel using the local node equipment as Ingress node equipment is regard as all traffic engineering tunnels
In effective traffic engineering tunnel；
In the link result of calculate node equipment room, generally only node device state is " full ", and is saved with neighbours
Link State may participate in link calculation for the node device of " up " between point device, therefore link result includes each link
On all node devices be available node device.Excluded calculating local node equipment between other each node devices
After the link result of each link obtained after all MPLS traffic engineering tunnels, all node device marks in the link result
Know and all available MPLS traffic engineering tunnels for being made up of enabled node equipment are filtered out from all MPLS traffic engineering tunnels, and will be with
The local node equipment is as the available MPLS traffic engineering tunnels of Ingress node equipment as in all MPLS traffic engineering tunnels
Effective traffic engineering tunnel.On the contrary, in all traffic engineering tunnels, the MPLS traffic engineering tunnels not being made up of all enabled node equipment, and not
It is that available MPLS traffic engineering tunnels using the local node equipment as Ingress node equipment are inaccessible failure MPLS TE
Tunnel.
For example, it is assumed that the OSPF configurations in node device RE are deleted, cause node device RE abnormal states, calculating
All link results in will not include RE, then checked in local node equipment RA and Ingress node equipment be used as using itself
During MPLS traffic engineering tunnels, then the mpls-te tunnel that can determine whether out RA to the RF is inaccessible failure MPLS traffic engineering tunnels.
If node device RA, RE and RF are enabled node equipment, then included in all link results calculated
RA, RE and RF, it is determined that the RA to RF MPLS traffic engineering tunnels are reachable effective traffic engineering tunnel.
Step 203, the neighbor node for the tunnel information of effective traffic engineering tunnel being published into the local node equipment is set
It is standby.
After effective MPLS traffic engineering tunnels are determined, the effective MPLS traffic engineering tunnels can be added to after LSA, encapsulated
The neighbor node equipment of the local node equipment is published into IGP messages.The effective MPLS traffic engineering tunnels now issued,
The MPLS traffic engineering tunnels that the node device of failure is constituted as are eliminated, can be prevented effectively to neighbor device and issue failed
MPLS TE Links.
RA to RF MPLS traffic engineering tunnels can be added to after LSA by such as local node equipment RA, encapsulation to IGP messages
In be published to the neighbor node equipment RB and RC, RB and RC of the local node equipment again by the RA to RF MPLS TE
Tunnel is distributed to respective neighbor node equipment RD and RE, RF respectively, until all node devices all receive the RA to RF's
MPLS traffic engineering tunnels, and the RA to RF MPLS traffic engineering tunnels are participated in respective router-level topology.The IGP messages include this
The Ingress node mark (MPLS LSR-RAID) and Egress node mark (MPLS LSR- of effective MPLS traffic engineering tunnels
RFID), while the LSA header informations for being encapsulated in IGP messages also include the Egress node RF's of the effective MPLS traffic engineering tunnels
ID (OSPF Router RFID), neighbor node equipment is after the IGP messages of RA issues are received, according to MPLS traffic engineering tunnels
Egress node mark (MPLSLSR-RFID) searches outlet node R F ID (OSPF Router RFID), and carries out follow-up road
By calculating.
Further, can be according to local record after effective MPLS traffic engineering tunnels information is issued to neighbor node equipment
Each node device issue LSA carry out link calculation again, this time link calculation be according to shortest path tree algorithm calculate this
The link result of effective MPLS traffic engineering tunnels is included between ground node device and each enabled node equipment, is included calculating
After the link result of effective MPLS traffic engineering tunnels, the link result comprising effective MPLS traffic engineering tunnels can be used to update pre-
The route forwarding table items deposited.
Specifically, RA to RF MPLS traffic engineering tunnel information is published to the local node equipment by local node equipment RA
Neighbor node equipment RB and RC after, local node equipment RA is entered into line link with RB, RC, RD, RE and RF respectively again
Calculate.It should be noted that this time including RA to RF MPLS traffic engineering tunnels in link calculation, RA to RF link knot is being calculated
During fruit, the RA to RF MPLS traffic engineering tunnels are participated in router-level topology as an OSPF link between two node devices,
The RA so calculated to RF link result is the Cost for including the RA-RF drawn after RA to the MPLS traffic engineering tunnels between RF.
After link calculation is re-started, it the link result comprising effective MPLS traffic engineering tunnels can be used to update and prestore
Route forwarding table items so that subsequently carry out flow forwarding when, can effectively provide road according to the route forwarding table items of the renewal
By the efficiency calculated and flow is forwarded.
Fig. 3 is refer to, is the hardware structure schematic diagram of local node equipment where traffic engineering tunnel information delivery apparatus of the present invention,
Its basic hardware environment includes CPU, internal memory, forwarding chip, nonvolatile memory and other hardware.Fig. 4 is the traffic engineering tunnel
The logical construction schematic diagram of information delivery apparatus, it is a logic device in essence.In the present embodiment, with software
Exemplified by realization, the traffic engineering tunnel information delivery apparatus can include the first link calculation unit 401, effective tunnel on logic level
Detection unit 402 and effectively tunnel release unit 403.Wherein：
First link calculation unit 401, owns for calculating to exclude between local node equipment and other each node devices
The link result of each link of traffic engineering tunnel, the link result includes all node equipment identifications on each link；
Effective Tunnel testing unit 402, for all node equipment identifications in the link result from the institute
Have and available traffic engineering tunnel is filtered out in traffic engineering tunnel, the available traffic engineering tunnel using the local node equipment as Ingress node equipment is made
For effective traffic engineering tunnel in all traffic engineering tunnels；
Effective tunnel release unit 403, for the tunnel information of effective traffic engineering tunnel to be published into the local node
The neighbor node equipment of equipment.
Further, described device can also include the second link calculation unit 404 and entry updating unit 405, its
In：Second link calculation unit 404, for the LSA issued according to each node device of local record, is calculated according to shortest path tree
Method calculates the link result for including effective traffic engineering tunnel between local node equipment and each enabled node equipment；Entry updating list
Member 405, for updating the route forwarding table items prestored using the link result comprising effective traffic engineering tunnel.
As shown in figure 5, the first link calculation unit 401 in Fig. 4 can specifically include traffic engineering tunnel check subelement 4011,
Enabled node determination subelement 4012 and link calculation subelement 4013, wherein：Traffic engineering tunnel checks subelement 4011, for examining
Look into all traffic engineering tunnels existed between the local node equipment and other node devices；Enabled node determination subelement 4012, is used
Determine that link connection is just between local node equipment in the LSA LSA issued according to each node device prestored
Normal enabled node equipment；Link calculation subelement 4013, for calculating the local node according to shortest path tree algorithm
Equipment and each enabled node equipment room, exclude the link result of each link obtained after all traffic engineering tunnels.
As shown in fig. 6, effective Tunnel testing unit 402 in Fig. 4 can specifically include available tunnel determination subelement
4021, for using the traffic engineering tunnel being made up of in all traffic engineering tunnels the enabled node equipment as traffic engineering tunnel can be used.
As can be seen that the present invention in issue mpls-te tunnel by believing from the embodiment of any of the above method and apparatus
Before breath, the link result of each link between local node equipment and other each node devices is calculated first, and is detected with institute
Local node equipment is stated as effective traffic engineering tunnel of Ingress node equipment, the tunnel information of effective traffic engineering tunnel is finally published to institute
State the neighbor node equipment of local node equipment, it is ensured that node device issues effective MPLS traffic engineering tunnels information, so as to avoid
Node device occurs the situation of mistake when carrying out router-level topology.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (8)
1. a kind of TE tunnel of traffic engineering information issuing method, it is characterised in that methods described includes：
The link result for each link that all traffic engineering tunnels are excluded between local node equipment and other each node devices is calculated, it is described
Link result includes all node equipment identifications on each link；
All node equipment identifications in the link result filter out available traffic engineering tunnel from all traffic engineering tunnels, will
Available traffic engineering tunnel using the local node equipment as Ingress node equipment is used as effective TE tunnels in all traffic engineering tunnels
Road；
The tunnel information of effective traffic engineering tunnel is published to the neighbor node equipment of the local node equipment；
Wherein, the link for calculating each link that all traffic engineering tunnels are excluded between local node equipment and other each node devices
As a result specifically include：
Check all traffic engineering tunnels existed between the local node equipment and other node devices；
The link connection between local node equipment is determined according to the LSA LSA that each node device prestored is issued
Normal enabled node equipment；
The local node equipment and each enabled node equipment room are calculated according to shortest path tree algorithm, all TE are excluded
The link result of each link obtained behind tunnel.
2. the method as described in claim 1, it is characterised in that all node device marks in the link result
Knowledge filters out available traffic engineering tunnel from all traffic engineering tunnels and specifically included：
Using the traffic engineering tunnel being made up of in all traffic engineering tunnels the enabled node equipment as traffic engineering tunnel can be used.
3. the method as described in claim 1, it is characterised in that effective traffic engineering tunnel information is being published to the local section
After the neighbor node equipment of point device, methods described also includes：
The LSA issued according to each node device of local record, local node equipment is calculated and each according to shortest path tree algorithm
The link result of effective traffic engineering tunnel is included between enabled node equipment；
The route forwarding table items prestored are updated using the link result comprising effective traffic engineering tunnel.
4. the method as described in any one in claims 1 to 3, it is characterised in that the link result includes node device
Between link overhead Cost.
5. a kind of TE tunnel of traffic engineering information delivery apparatus, it is characterised in that described device includes：
First link calculation unit, all traffic engineering tunnels are excluded for calculating between local node equipment and other each node devices
The link result of each link, the link result includes all node equipment identifications on each link；
Effective Tunnel testing unit, for all node equipment identifications in the link result from all traffic engineering tunnels
In filter out available traffic engineering tunnel, regard the available traffic engineering tunnel using the local node equipment as Ingress node equipment as the institute
There is effective traffic engineering tunnel in traffic engineering tunnel；
Effective tunnel release unit, the neighbour for the tunnel information of effective traffic engineering tunnel to be published to the local node equipment
Occupy node device；
Wherein, the first link calculation unit is specifically included：
Traffic engineering tunnel checks subelement, all TE tunnels existed for checking between the local node equipment and other node devices
Road；
Enabled node determination subelement, for according to prestore each node device issue LSA LSA determine with
The normal enabled node equipment of link connection between local node equipment；
Link calculation subelement, sets for calculating the local node equipment according to shortest path tree algorithm with each enabled node
Between standby, the link result of each link obtained after all traffic engineering tunnels is excluded.
6. device as claimed in claim 5, it is characterised in that effective Tunnel testing unit is specifically included：
Tunnel determination subelement can be used, for the traffic engineering tunnel being made up of in all traffic engineering tunnels the enabled node equipment to be made
To can use traffic engineering tunnel.
7. device as claimed in claim 5, it is characterised in that described device also includes：
Second link calculation unit, for the LSA issued according to each node device of local record, according to shortest path tree algorithm
Calculate the link result for including effective traffic engineering tunnel between local node equipment and each enabled node equipment；
Entry updating unit, for updating the route forwarding table items prestored using the link result comprising effective traffic engineering tunnel.
8. the device as described in any one in claim 5 to 7, it is characterised in that the link result includes node device
Between link overhead Cost.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060497A (en) * | 2007-06-11 | 2007-10-24 | 杭州华三通信技术有限公司 | A traffic engineering tunnel creating method and device |
| CN102136965A (en) * | 2010-12-24 | 2011-07-27 | 华为技术有限公司 | Method for detecting tunnel faults and traffic engineering (TE) node |
| CN103490970A (en) * | 2013-09-23 | 2014-01-01 | 华为技术有限公司 | Detection method, device and system of traffic engineering tunnel |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060497A (en) * | 2007-06-11 | 2007-10-24 | 杭州华三通信技术有限公司 | A traffic engineering tunnel creating method and device |
| CN102136965A (en) * | 2010-12-24 | 2011-07-27 | 华为技术有限公司 | Method for detecting tunnel faults and traffic engineering (TE) node |
| CN103490970A (en) * | 2013-09-23 | 2014-01-01 | 华为技术有限公司 | Detection method, device and system of traffic engineering tunnel |
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