CN103873370A - Method and system for processing IGMP messages - Google Patents
Method and system for processing IGMP messages Download PDFInfo
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- CN103873370A CN103873370A CN201410141055.4A CN201410141055A CN103873370A CN 103873370 A CN103873370 A CN 103873370A CN 201410141055 A CN201410141055 A CN 201410141055A CN 103873370 A CN103873370 A CN 103873370A
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Abstract
The invention provides a method and system for processing IGMP messages. According to the method, if IGMP joining messages are received, transmitting information including an Mac multicast address, an Ip multicast address and port information is generated and stored; if IGMP service messages are received, one of the Mac multicast address and the Ip multicast address is selected, and based on the selecting result and the stored transmitting information, transmitting messages are transmitted; if IGMP leaving messages are received, specific group last member checking messages are generated, and the specific group last member checking messages are sent from a port which the leaving messages come from; if response messages of the checking messages are not received after preset time, based on the port which the leaving messages come from, corresponding information in the stored transmitting information is deleted; if the response messages are received in the preset time, the leaving messages are abandoned; and if the checking messages are received, the checking messages are transmitted from ports. The method and system can be used in network equipment, especially in two-layer and three-layer gateway equipment in an EPON system.
Description
Technical field
The present invention relates to message process field, particularly relate to a kind of method and system of the IGMP of processing message.
Background technology
IGMP Snooping is Internet Group Management Protocol Snooping(internet group management protocol snooping) abbreviation, it is the multicast tied mechanism operating on two-layer equipment, for management and control multicast.The two-layer equipment of operation IGMP Snooping is analyzed by the IGMP message to receiving, for port and MAC multicast address are set up mapping relations, and according to mapping relations multicast data forwarding.In the time that two-layer equipment does not move IGMP Snooping, multicast packet is broadcasted at two layers; When after two-layer equipment operation IGMP Snooping, the multicast packet of known multicast group can not be broadcasted at two layers, and is given at two layers the recipient who specifies by multicast.
IGMP Snooping is the same with IGMP agreement, both, for management and the control of multicast group, all uses IGMP message.IGMP agreement operates in network layer, IGMP Snooping operates in link layer, in the time that layer 2 ethernet switch is received the IGMP message transmitting between main frame and router, Ethernet switch based on IGMP Snooping protocal analysis IGMP message with information, set up and safeguard MAC table at two layers, the multicast message issuing from router just forwards according to MAC table later.
IGMP Snooping, monitors IGMP protocol package exactly, extracts corresponding information, forms multicast member relation table, then multicast service is forwarded according to group membership's relation, guarantee that group membership receives correct multicast service, and all the other main frames cannot be received.IGMP Snooping is transparent with respect to router and main frame, and it only monitors IGMP message between the two, sets up the multicast member relation table of oneself.
At present, in EPON system, be included in the gateway device of some other two layers or three layers, applying maximum is exactly traditional IGMP Snooping agreement, the main task that traditional IGMP Snooping agreement completes is the IGMP data message of monitoring between three-layer equipment and terminal equipment, and generate a port repeat list based on multicast mac address, these protocol data messages are not analyzed and processed.When receiving igmp report, when the message of leave type, the processing mode of traditional IGMP Snooping protocol stack is exactly directly this port to be deleted from corresponding multicast address forwarding list, the namely mode of operation of fast leave, if but the equipment linking under this port is not a terminal, but when the gateway device with function of exchange of two layers or three layers, the mode of operation of fast leave can cause all terminal equipments under this port all cannot receive the Business Stream of this multicast source address, also just limited the scope of the reliability of system and the scale of network, therefore, need to improve existing IGMP Snooping agreement.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide the method and system of a kind of processing to IGMP message, to can be applicable to gateway device, and the especially needs of the gateway device in EPON network.
For achieving the above object and other relevant objects, the invention provides the method for a kind of processing to IGMP message, be applied in the network equipment, it at least comprises: while receiving based on the joining message of IGMP Snooping protocol generation, join message to generate and comprise Mac multicast address, the Ip multicast address corresponding with this Mac multicast address and the forwarding information of port information based on this, and stored; While receiving the service message based on IGMP Snooping protocol generation, the relevant information based on this service message is selected one in Mac multicast address and Ip multicast address, and the result based on selecting and the forwarding information stored E-Packet this to be forwarded; While receiving the leave message based on IGMP Snooping protocol generation, relevant information based on this leave message, IGMP Snooping agreement and pre-defined algorithm generate the last membership query message of particular group, and from this leave message institute from port transmission; If do not receive the response message of the last membership query message of this particular group after the scheduled time, based on this leave message from port by storage forwarding information in corresponding information delete; If receive in the given time the response message of the last membership query message of this particular group, abandon this leave message; By the query message of receiving by each port repeat.
Preferably, the method for described processing IGMP message also comprises: generate general query message based on system requirements.
The present invention also provides a kind for the treatment of system of the IGMP of processing message, be applied in the network equipment, it at least comprises: the first generation module, when receiving based on the joining message of IGMP Snooping protocol generation, join message to generate and comprise Mac multicast address, the Ip multicast address corresponding with this Mac multicast address and the forwarding information of port information based on this, and stored; The first forwarding module, while being used for receiving the service message based on IGMP Snooping protocol generation, relevant information based on this service message is selected one in Mac multicast address and Ip multicast address, and the result based on selecting and the forwarding information stored E-Packet this to be forwarded; Sending module, while being used for receiving the leave message based on IGMP Snooping protocol generation, relevant information based on this leave message, IGMP Snooping agreement and pre-defined algorithm generate the last membership query message of particular group, and from this leave message institute from port transmission; Processing module, if for do not receive the response message of the last membership query message of this particular group after the scheduled time, based on this leave message from port by storage forwarding information in corresponding information delete; If receive in the given time the response message of the last membership query message of this particular group, abandon this leave message; The second forwarding module, for by the query message of receiving by each port repeat.
Preferably, if the last membership query message of particular group is the multicast inquiry message of two layers, in this multicast inquiry message of two layers, comprise the Layer 2 data head that the mode of operation based on port generates; More preferably, if the mode of operation of port is access pattern, this multicast inquiry message of two layers is without multicast vlan; If the mode of operation of port is tag pattern, the acquiescence multicast vlan of the multicast vlan of this multicast inquiry message of two layers based on port decides; If the mode of operation of port is transparent transmission mode, the vlan information of the multicast vlan of this multicast inquiry message of two layers based in described leave message determines.
As mentioned above, the method and system of processing IGMP message of the present invention, have following beneficial effect: 1) both can support Mac multicast address to forward and also can support Ip multicast address multicast data forwarding stream; 2) can support fast leave and non fast leave function; 3) sending the vlan attribute that can resolve port when query message, support different port to do different vlan tag operations; 4) two layers and three layer protocol data messages be can process, route or two layers of gateway device can be used for.
Accompanying drawing explanation
Fig. 1 is shown as the flow chart of the method for processing IGMP message of the present invention.
Fig. 2 is shown as the treatment system schematic diagram of processing IGMP message of the present invention.
Element numbers explanation
1 treatment system
11 first generation modules
12 first forwarding modules
13 sending modules
14 processing modules
15 second forwarding modules
2 forwarding information bases
S1～S5 step
Embodiment
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification.The present invention can also be implemented or be applied by other different embodiment, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
Refer to Fig. 1 to Fig. 2.It should be noted that, the diagram providing in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy and only show with assembly relevant in the present invention in graphic but not component count, shape and size drafting while implementing according to reality, when its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
As shown in Figure 1, the invention provides a kind of method of the IGMP of processing message.Wherein, the method according to this invention mainly completes by treatment system, and this treatment system includes but not limited to be arranged in gateway device and can realize the present invention program's such as application module, operating system, processing controller etc.Wherein, this network equipment includes but not limited to: the gateway device in router, EPON system, for example, two layers of gateway device, three-layer network pass equipment etc. in EPON system.
In step S1, when described treatment system is received based on the joining message of IGMP Snooping protocol generation, join message to generate and comprise Mac multicast address, the Ip multicast address corresponding with this Mac multicast address and the forwarding information of port information based on this, and stored.
Particularly, when described treatment system is received end user device based on the joining message of IGMP Snooping protocol generation, in following forwarding list, increase a list item, Mac address (Mac group address) in the list item increasing for this Mac multicast address, Ip address (Ip group address) after joining message multicast address entrained and transforming be that the corresponding Ip multicast address of this Mac multicast address, port numbers are to receive the port that this joins message, and the forwarding list after this renewal is stored.
Forward list:
In step S2, when described treatment system is received the service message based on IGMP Snooping protocol generation, relevant information based on this service message is selected one in Mac multicast address and Ip multicast address, and the result based on selecting and the forwarding information stored E-Packet this to be forwarded.
Wherein, the relevant information of described service message comprises any information that can be used for determining multicast address, preferably, includes but not limited to: symbolic animal of the birth year information, so-called symbolic animal of the birth year information is the information that need to forward or forward based on Ip address based on Mac address for identifying multicast data flow.
In step S3, when described treatment system is received the leave message based on IGMP Snooping protocol generation, relevant information based on this leave message, IGMP Snooping agreement and pre-defined algorithm generate the last membership query message of particular group, and from this leave message institute from port transmission.
Particularly, when described treatment system is received the leave message of igmp leave type of end user device transmission, can directly this port not deleted from multicast forwarding list, but first start a timer (timer) according to the igmp parameter of system configuration, the length of timer determined by system configuration information, sends the last member of particular group (last member) query message after having started timer to the port of receiving leave message.Wherein, this query message is not to be generated by upper united mouth equipment, but generated by a series of algorithm in this locality by described treatment system, the leave message that the Ip multicast address of specific multicast query message is received from port, extract, if what send is the multicast inquiry message of two layers, also need the vlan Information generation Layer 2 data head according to port, before timer finishes, wait for the response message (igmp report message) that end user device sends over after sending query message.
Wherein, the message sending for common gateway device port may be that untag does not namely have vlan information, but for the epon equipment of relative complex, port may be that tag pattern may be also the mode of operation of other types, therefore, described treatment system need to be considered the value of vlan field in the time sending multicast inquiry message, generally has following three kinds of processing modes for vlan tag value:
● when access pattern, in the time generating group-specific query message, Layer 2 data head does not add vlan tag;
● when tag pattern, insert vlan tag information at the Layer 2 data head that generates group-specific query message, the value of vlan is by the pvid(acquiescence vlan of port) decide;
● the vlan tag information of the two layers of head of query message that generate when transparent transmission mode is determined by the vlan information in the leave message of receiving.
Then, in step S4, if do not receive the response message of the last membership query message of this particular group after the scheduled time, described treatment system based on this leave message from port by storage forwarding information in corresponding information delete; If receive in the given time the response message of the last membership query message of this particular group, abandon this leave message.
Particularly, if received the response message (being report message) of this multicast source address before timer finishes, represent to also have under port the Business Stream that equipment need to this multicast source address, described treatment system directly abandons this igmp leave message, is left intact; After timer finishes, do not receive any report message, based on this leave message from port by the respective table entry deletion of forwarding list of storage.
Preferably, after timer finishes, do not receive any report message, described treatment system is restarted timer again, and waits for report message, the number of times repeating presets, and the process of inquiring about by several times can guarantee that other equipment under port can receive multi-cast business data stream normally.
In step S5, described treatment system by the query message of receiving by each port repeat.
As a kind of optimal way, method of the present invention also comprises that step S6(is not shown).
In step S6, described treatment system generates general query message based on system requirements.
It should be noted that, those skilled in the art should knownly know general query message, therefore no longer described in detail at this.
As shown in Figure 2, the invention provides a kind for the treatment of system of the IGMP of processing message.Wherein, described treatment system 1 at least comprises: the first generation module 11, the first forwarding module 12, sending module 13, processing module 14 and the second forwarding module 15.
When described the first generation module 11 is received based on the joining message of IGMP Snooping protocol generation, join message to generate and comprise Mac multicast address, the Ip multicast address corresponding with this Mac multicast address and the forwarding information of port information based on this, and stored.
Particularly, when described the first generation module 11 is received end user device based on the joining message of IGMP Snooping protocol generation, in following forwarding list, increase a list item, Mac address (Mac group address) in the list item increasing for this Mac multicast address, Ip address (Ip group address) after joining message multicast address entrained and transforming be that the corresponding Ip multicast address of this Mac multicast address, port numbers are to receive the port that this joins message, and the forwarding list after this renewal is deposited in forwarding information base 2.
Forward list:
When described the first forwarding module 12 is received the service message based on IGMP Snooping protocol generation, relevant information based on this service message is selected one in Mac multicast address and Ip multicast address, and the result based on selecting and the forwarding information stored E-Packet this to be forwarded.
Wherein, the relevant information of described service message comprises any information that can be used for determining multicast address, preferably, includes but not limited to: symbolic animal of the birth year information etc.Wherein, so-called symbolic animal of the birth year information, is the information that need to forward or forward based on Ip address based on Mac address for identifying multicast data flow.
When described sending module 13 is received the leave message based on IGMP Snooping protocol generation, relevant information based on this leave message, IGMP Snooping agreement and pre-defined algorithm generate the last membership query message of particular group, and from this leave message institute from port transmission.
Particularly, when described sending module 13 is received the leave message of igmp leave type of end user device transmission, can directly this port not deleted from multicast forwarding list, but first start a timer (timer) according to the igmp parameter of system configuration, the length of timer determined by system configuration information, sends the last member of particular group (last member) query message after having started timer to the port of receiving leave message.Wherein, this query message is not to be generated by upper united mouth equipment, but generated by a series of pre-defined algorithm in this locality by described sending module 13, the leave message that the Ip multicast address of specific multicast query message is received from port, extract, if what send is the multicast inquiry message of two layers, also need the vlan Information generation Layer 2 data head according to port, before timer finishes, wait for the response message (igmp report message) that end user device sends over after sending query message.
Wherein, the message sending for common gateway device port may be that untag does not namely have vlan information, but for the epon equipment of relative complex, port may be that tag pattern may be also the mode of operation of other types, therefore, described sending module 13 need to be considered the value of vlan field in the time sending multicast inquiry message, generally has following three kinds of processing modes for vlan tag value:
● when access pattern, in the time generating group-specific query message, Layer 2 data head does not add vlan tag;
● when tag pattern, insert vlan tag information at the Layer 2 data head that generates group-specific query message, the value of vlan is by the pvid(acquiescence vlan of port) decide;
● the vlan tag information of the two layers of head of query message that generate when transparent transmission mode is determined by the vlan information in the leave message of receiving.
Then, if do not receive the response message of the last membership query message of this particular group after the scheduled time, described processing module 14 based on this leave message from port by storage forwarding information in corresponding information delete; If receive in the given time the response message of the last membership query message of this particular group, abandon this leave message.
Particularly, if received the response message (being report message) of this multicast source address before timer finishes, represent to also have under port the Business Stream that equipment need to this multicast source address, described processing module 14 directly abandons this igmp leave message, is left intact; After timer finishes, do not receive any report message, based on this leave message from port by the respective table entry deletion of forwarding list of storage.
Preferably, after timer finishes, do not receive any report message, described processing module 14 is restarted timer again, and waits for report message, the number of times repeating presets, and the process of inquiring about by several times can guarantee that other equipment under port can receive multi-cast business data stream normally.
Described the second forwarding module 15 by the query message of receiving by each port repeat.
As a kind of optimal way, described treatment system 1 also comprises the second generation module (not shown).
Described the second generation module generates general query message based on system requirements.
It should be noted that, those skilled in the art should knownly know general query message, therefore no longer described in detail at this.
In sum, the method and system of processing IGMP message of the present invention, not only support fast leave function for the protocol massages of the IGMP leave type of receiving, have added the function of non fast leave simultaneously; And non fast leave function is not only supported the inquiry of particular group, also supports general polling message simultaneously; Having, is not simply to send out from corresponding port for the query message of sending from three layers of routing device again, but considers the attribute of this port, such as adding the operation of vlan tag or modification vlantag; Further, can support the Ip data message of three layers, the multicast forwarding list of generation also can forward based on Ip multicast address.So the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (10)
1. process a method for IGMP message, be applied in the network equipment, it is characterized in that, the processing method of described IGMP message at least comprises:
While receiving based on the joining message of IGMP Snooping protocol generation, join message to generate and comprise Mac multicast address, the Ip multicast address corresponding with this Mac multicast address and the forwarding information of port information based on this, and stored;
While receiving the service message based on IGMP Snooping protocol generation, the relevant information based on this service message is selected one in Mac multicast address and Ip multicast address, and the result based on selecting and the forwarding information stored E-Packet this to be forwarded;
While receiving the leave message based on IGMP Snooping protocol generation, relevant information based on this leave message, IGMP Snooping agreement and pre-defined algorithm generate the last membership query message of particular group, and from this leave message institute from port transmission;
If do not receive the response message of the last membership query message of this particular group after the scheduled time, based on this leave message from port by storage forwarding information in corresponding information delete; If receive in the given time the response message of the last membership query message of this particular group, abandon this leave message;
By the query message of receiving by each port repeat.
2. the method for processing IGMP message according to claim 1, it is characterized in that: if the last membership query message of particular group is the multicast inquiry message of two layers, in this multicast inquiry message of two layers, comprise the Layer 2 data head that the mode of operation based on port generates.
3. the method for processing IGMP message according to claim 2, is characterized in that: if the mode of operation of port is access pattern, this multicast inquiry message of two layers is without multicast vlan; If the mode of operation of port is tag pattern, the acquiescence multicast vlan of the multicast vlan of this multicast inquiry message of two layers based on port decides; If the mode of operation of port is transparent transmission mode, the vlan information of the multicast vlan of this multicast inquiry message of two layers based in described leave message determines.
4. the method for processing IGMP message according to claim 1, characterized by further comprising: generate general query message based on system requirements.
5. the method for processing according to claim 1 IGMP message, is characterized in that: the described network equipment comprises one or more in two layers of gateway device and the three-layer network pass equipment in router, EPON system.
6. process a treatment system for IGMP message, be applied in the network equipment, it is characterized in that, the treatment system of described processing IGMP message at least comprises:
The first generation module, when receiving based on the joining message of IGMP Snooping protocol generation, join message to generate and comprise Mac multicast address, the Ip multicast address corresponding with this Mac multicast address and the forwarding information of port information based on this, and stored;
The first forwarding module, while being used for receiving the service message based on IGMP Snooping protocol generation, relevant information based on this service message is selected one in Mac multicast address and Ip multicast address, and the result based on selecting and the forwarding information stored E-Packet this to be forwarded;
Sending module, while being used for receiving the leave message based on IGMP Snooping protocol generation, relevant information based on this leave message, IGMP Snooping agreement and pre-defined algorithm generate the last membership query message of particular group, and from this leave message institute from port transmission;
Processing module, if for do not receive the response message of the last membership query message of this particular group after the scheduled time, based on this leave message from port by storage forwarding information in corresponding information delete; If receive in the given time the response message of the last membership query message of this particular group, abandon this leave message;
The second forwarding module, for by the query message of receiving by each port repeat.
7. the treatment system of processing IGMP message according to claim 6, it is characterized in that: if the last membership query message of particular group is the multicast inquiry message of two layers, in this multicast inquiry message of two layers, comprise the Layer 2 data head that the mode of operation based on port generates.
8. the treatment system of processing IGMP message according to claim 7, is characterized in that: if the mode of operation of port is access pattern, this multicast inquiry message of two layers is without multicast vlan; If the mode of operation of port is tag pattern, the acquiescence multicast vlan of the multicast vlan of this multicast inquiry message of two layers based on port decides; If the mode of operation of port is transparent transmission mode, the vlan information of the multicast vlan of this multicast inquiry message of two layers based in described leave message determines.
9. the treatment system of processing IGMP message according to claim 6, characterized by further comprising: the second generation module, and for generating general query message based on system requirements.
10. the treatment system of processing according to claim 6 IGMP message, is characterized in that: the described network equipment comprises one or more in two layers of gateway device and the three-layer network pass equipment in router, EPON system.
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