CN104394084B - Message forwarding method and system in a kind of RPR networks - Google Patents
Message forwarding method and system in a kind of RPR networks Download PDFInfo
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- CN104394084B CN104394084B CN201410713120.6A CN201410713120A CN104394084B CN 104394084 B CN104394084 B CN 104394084B CN 201410713120 A CN201410713120 A CN 201410713120A CN 104394084 B CN104394084 B CN 104394084B
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Abstract
The invention discloses the message forwarding method and system in a kind of RPR networks, each node of the RPR networks is the stack equipment that the first member device and the second member device are formed, and wherein this method includes：First broadcast table of the first member device generation comprising non-local broadcast identification；Second broadcast table of the second member device generation comprising spot broadcasting mark；The identification of first member device needs the ether network packet broadcasted；The ether network packet for needing to broadcast is sent to the second member device by the first member device according to the first broadcast table；The received ether network packet for needing to broadcast is encapsulated as RPR broadcasting packets by the second member device according to the second broadcast table, is forwarded to by the outgoing interface of the second broadcast table.
Description
Technical field
The present invention relates to field of communication technology, message forwarding method and system in more particularly to a kind of RPR networks.
Background technology
RPR (Resilient Packet Ring, resilient packet ring) is a kind of new MAC (Media Access
Control, media access control) agreement, it can run on SONET (Synchronous Optical Network, synchronous optical network
Network)/SDH (Synchronous Digital Hierarchy, Synchronous Digital Hierarchy), DWDM (Dense Wavelength
Division Multiplexing, level of confidentiality wavelength-division multiplex) and Ethernet on, provided flexibly for broadband IP MAN operator
Efficient networking plan.
RPR realizes the transparent transmission of Ethernet Over RPR using the encapsulation of RPR mac layer frames.The ring structure of RPR and open up
The repeating process and access device that protection mechanism is flutterred to institute's bearer traffic are transparent.
RPR networks shown in Fig. 1 are made of node 101-104.As shown in Figure 1, node 101 is by member device 101-1
The stack equipment formed with 101-2；Node 102 is the stack equipment being made of member device 102-1 and 102-2；Node 103 is
The stack equipment being made of member device 103-1 and 103-2；Node 104 is the heap being made of member device 104-1 and 104-2
Stacking device.
Each member device independent operating RPR agreements of node 101-104, collect RPR network topologies, are calculated and cover
Up to the outgoing interface of other each nodes, learn MAC Address and RPR MAC Address.Each node receives user's report from site-local
Text, by Load Sharing Algorithm, for example HASH algorithms, selection handles the member device of local site user message, will be received
The user's message of site-local is sent to selected member device, is then calculated by selected member device by itself and reaches it
The user's message for being encapsulated as RPR messages is sent to the connected member device of other nodes in RPR networks by the outgoing interface of his node.
For example, when node 101 receives the user's message of site-local, user's message is sent to by member device 101-1 by HASH algorithms
It is forwarded to.Member device 101-1 identifications need the user's message broadcasted, and are purpose RPR MAC Address by user's message encapsulation
It is the RPR messages of broadcast address, the outgoing interface on the path of each node member's equipment of arrival calculated by itself sends encapsulation
RPR messages afterwards.
Due to the respective independent operating RPR agreements of member device of each node, each node can not perceive local member device with
Whether the forward-path between the member device of other nodes is normal, so that the broadcasting packet of the user equipment of site-local be sent out
Member device toward on failure forward-path, causes retransmission failure.It is assumed that the forwarding road between member device 103-1 and 102-1
Footpath failure, when user's broadcasting packet of received site-local is distributed to member device 101-1, member device by node 101
When 101-1 sends RPR broadcasting packets in RPR networks and send, the user's message can not by RPR network destineds node 103 into
Member's equipment 103-1 carries out follow-up forward process.
The content of the invention
It is an object of the invention to provide the message forwarding method and system in a kind of RPR networks, the first He of the system
Second member device selects normal forward-path to perform the forwarding of RPR broadcasting packets in RPR networks according to the spot broadcasting table of maintenance.
An embodiment of the present invention provides the message forwarding method in a kind of RPR networks, each node of the RPR networks is
The stack equipment that first member device and the second member device are formed, this method include：The generation of first member device includes non-
First broadcast table of ground broadcast identification；Second broadcast table of the second member device generation comprising spot broadcasting mark；First member
Equipment identification needs the ether network packet broadcasted；First member device according to the first broadcast table by it is described need broadcast with
Too network packet is sent to the second member device；Second member device broadcasts the received needs according to the second broadcast table
Ether network packet is encapsulated as RPR broadcasting packets, is forwarded to by the outgoing interface of the second broadcast table.
The embodiment of the present invention additionally provides a kind of message forwarding system, which is applied to the section as the RPR networks
The stack equipment being made of the first member device and the second member device of point device, wherein, the first member device generation
The first broadcast table comprising non-local broadcast identification；Second broadcast of the second member device generation comprising spot broadcasting mark
Table；The first member device identification needs the ether network packet broadcasted；First member device is according to the described first broadcast
The ether network packet for needing to broadcast is sent to the second member device by table；Second member device is according to the described second broadcast
The received ether network packet for needing to broadcast is encapsulated as RPR broadcasting packets by table, goes out to connect by the second broadcast table
Mouth is forwarded to.
The beneficial effects of the present invention are each node device of RPR networks is set by the first member device and the second member
The standby stack equipment formed, the first and second member devices of each stack equipment system are selected according to the spot broadcasting table of maintenance
Normal forward-path performs the forwarding of RPR broadcasting packets in RPR networks, reduces message forwarding failure.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is existing RPR network diagrams.
Fig. 2 is RPR network diagrams provided in an embodiment of the present invention.
Fig. 3 is message forwarding path schematic diagram of the embodiment of the present invention.
Embodiment
For the purpose of the present invention, technical solution and advantage is more clearly understood, develop simultaneously embodiment referring to the drawings,
The present invention is described in more detail.
RPR of embodiment of the present invention networks shown in Fig. 2 include node A-D.Wherein, node A is by member device A1 and A2
The stack equipment of composition, the RPR MAC Address of node A is MAC-A；The stack equipment that member device B1 and B2 are formed is as node
The RPR MAC Address of B, node B are MAC-B；The stack equipment that member device C1 and C2 are formed is as node C, the RPR of node C
MAC Address is MAC-C；Node D is to form stack equipment by D1 and D2, and the RPR MAC Address of node D is MAC-D.
Each self-operating RPR agreements of member device of node A-D, collect RPR network topological informations, and will each collect
RPR network topological informations, are synchronized to another member device of same node.Each member device is according to the RPR networks of themselves capture
The RPR network topological informations of another member device synchronization of topology information and local node, generation broadcast table.Work as member device
During the RPR network topological informations change of collection, the RPR network topological informations after change are synchronized to another member of local node
Equipment.When the RPR network topological informations change of member device collection or the RPR nets of another member device synchronization of local node
When network topology information changes, member device renewal broadcast table.
In the present embodiment, the rule of each member device generation broadcast table is as follows：
Number of nodes in the RPR network topological informations that member device determines to collect is less than synchronous RPR network topological informations
In number of nodes, then non-local broadcast identification is set in broadcast table, by same node another member device forwarding go to it
The RPR messages of his node.
Number of nodes in the RPR network topological informations that member device determines to collect is not less than synchronous RPR network topologies letter
Number of nodes in breath, then set spot broadcasting to identify in table is broadcasted, and by the member device, locally other nodes are gone in forwarding
RPR messages.
By taking the member device A1 and A2 of Fig. 2 interior joints A as an example, the create-rule progress to above-mentioned broadcast table is as described below.
Member device A1 and A2 run RPR agreements.Member device A1 have collected RPR rings A1-B1-C1-D1 in RPR networks and open up
Information is flutterred, is port A1-1 according to the port that the topology information of collection determines to reach on the member device B1 shortest paths of node B,
Determine that two paths for reaching the member device C1 of node C are identical, but path where the A1-1 of port has higher priority, really
Surely the port reached on the shortest path of the member device D1 of node D is port A1-2.Member device A2 have collected in RPR networks
RPR ring A2-B2-C2-D2 topology informations, determine to reach the member device B2 shortest paths of node B according to the topology information of collection
On port be port A2-1, determine that two paths for reaching the member device C2 of node C are identical, but where the A2-1 of port
Path has higher priority, and the port for determining to reach on the shortest path of the member device D2 of node D is port A2-2.
In the topology information that member device A1 is collected, the corresponding outgoing interfaces of RPR MAC Address MAC-B are port A1-1,
The corresponding outgoing interfaces of RPR MAC Address MAC-C are A1-1, and the corresponding outgoing interfaces of RPR MAC Address MAC-D are port A1-1.Into
In the topology information that member's device A 2 is collected, the corresponding outgoing interfaces of RPR MAC Address MAC-B are port A2-1, RPR MAC Address
The corresponding outgoing interfaces of MAC-C are port A2-1, and the corresponding outgoing interfaces of RPR MAC Address MAC-D are port A2-1.
The topology information of collection is synchronized to other side by member device A1 and A2, according to the generation principle of above-mentioned broadcast table, respectively
Table is broadcasted in self-generating.It is total that the topology information that member device A1 is collected includes node A, node B, node C and node D, number of nodes
It is 4 altogether；Synchronous topology information includes node A, node B, node C and node D, number of nodes and is total up to 4.Therefore member device
Number of nodes in the RPR network topological informations that A1 determines to collect is equal to the number of nodes in synchronous RPR network topological informations, then exists
Spot broadcasting is set to identify in the broadcast table of member device A1.The topology information that member device A2 is collected includes node A, node
B, node C and node D, number of nodes are total up to 4；Synchronous topology information includes node A, node B, node C and node D, saves
Points are total up to 4.Therefore the number of nodes in the RPR network topological informations that member device A2 determines to collect is equal to synchronous RPR nets
Number of nodes in network topology information, then set spot broadcasting to identify in the broadcast table of member device A2.
The member device periodic harvest topology information of each node in Fig. 2.When the member device C1 failures of node C,
Not including node C in the topology information that the member device A1 of node A is collected, the topology information that member device A2 is newly collected is constant,
Still node A, node B, node C and node D are included.Member device A1 and A2 are mutually synchronized the topology information newly collected, member
The topology information that device A 1 is collected includes node A, node B and node D, number of nodes and is total up to 3；Wrapped in synchronous topology information
Include node A, node B, node C and node D, number of nodes and be total up to 4.Therefore member device A1 determines the RPR network topologies collected
Number of nodes in information is less than the number of nodes in synchronous RPR network topological informations, then is set in the broadcast table of member device A1
Put non-local broadcast identification.The topology information that member device A2 is collected includes node A, node B, node C and node D, node
Number is total up to 4；Synchronous topology information includes node A, node B and node D, number of nodes and is total up to 3.Therefore member device A2
Number of nodes in the RPR network topological informations for determining to collect is more than the number of nodes in synchronous RPR network topological informations, then into
The spot broadcasting mark set in the broadcast table of member's device A 2 remains unchanged.
The member device B1 and B2 of Fig. 2 interior joints B, and the member device C1 and C2 of node C is with above-mentioned identical broadcast
Table generates principle, and the broadcast table of each self-generating local, details are not described herein for the present embodiment.
Fig. 3 is message forwarding path schematic diagram of the embodiment of the present invention.What the embodiment of the present invention as shown in Figure 3 was provided
In RPR networks, path failure or member device C1 failures between the member device C1 of the member device B1 and node C of node B
Or member device C1 failures.Forward-path between the member device C1 of the member device A1 and node C of node A is by first in Fig. 2
Beginning proper transition is abnormal.Member device A1 and A2 periodic harvest topology information, and it is mutually in step the topology each collected
Information.
Non-local broadcast identification is set in the broadcast table of the member device A1 of node A.The broadcast of the member device A2 of node A
The spot broadcasting mark set in table remains unchanged.
Node A receives the ether network packet of local subscriber apparatus transmission, is sent into ether network packet according to HASH results
Member's device A 1 is forwarded to.Member device A1 determines that needs carry out broadcast forwarding, the non-local broadcast in spot broadcasting table
Mark, member device A2 is sent to by Ethernet broadcasting packet.
Spot broadcasting marks of the member device A2 in spot broadcasting table, it is wide to be encapsulated as RPR by Ethernet broadcasting packet
Text is reported, wherein RPR MAC Address in source is the RPR MAC Address MAC-A of node A, and purpose RPR MAC Address is broadcast address,
RPR broadcasting packets after encapsulation are sent according to the outgoing interface A2-1 of collecting topology.
Member device B2 receives RPR broadcasting packets, carried out ring forwarding, it is wide that RPR broadcasting packets are descapsulated into Ethernet
Text is reported, is locally forwarded to the user equipment of lower extension, at the same it is wide according to the RPR after the outgoing interface B2-1 of collecting topology transmission encapsulation
Report text.
Member device C2 receives RPR broadcasting packets, carried out ring forwarding, it is wide that RPR broadcasting packets are descapsulated into Ethernet
Text is reported, is locally forwarded to the user equipment of lower extension, at the same it is wide according to the RPR after the outgoing interface C2-1 of collecting topology transmission encapsulation
Report text.
Member device D2 receives RPR broadcasting packets, carried out ring forwarding, it is wide that RPR broadcasting packets are descapsulated into Ethernet
Text is reported, is locally forwarded to the user equipment of lower extension, at the same it is wide according to the RPR after the outgoing interface D2-1 of collecting topology transmission encapsulation
Report text.
Member device A2 receives RPR broadcasting packets, and lower ring forwarding is carried out according to source RPR MAC Address MAC-A, and RPR is wide
Report text and be descapsulated into Ethernet broadcasting packet, be locally forwarded to the user equipment of lower extension.
Member device the beneficial effects of the present invention are stack equipment in, Fig. 2 and Fig. 3 is according to the spot broadcasting table of maintenance
Select normal forward-path to perform the forwarding of RPR broadcasting packets in RPR networks, reduce broadcasting packet forwarding failure in RPR networks.
Method provided by the invention is described above, system provided by the invention is described below：
The system is applied to the node device as the RPR networks by the first member device and the second member device structure
Into stack equipment,
First broadcast table of the first member device generation comprising non-local broadcast identification；
Second broadcast table of the second member device generation comprising spot broadcasting mark；
The first member device identification needs the ether network packet broadcasted；
The ether network packet for needing to broadcast is sent to second by first member device according to the first broadcast table
Member device；
Second member device seals the received ether network packet for needing to broadcast according to the second broadcast table
Fill as RPR broadcasting packets, be forwarded to by the outgoing interface of the second broadcast table.
Further, RPR ring topology information where first member device is collected, by collected place RPR rings
Topology information is synchronized to the second member device；
First member device receives the RPR ring topology information of the second member device synchronization；
Number of nodes in the RPR network topological informations that first member device determines to collect is less than synchronous RPR networks
Number of nodes in topology information, generation the first broadcast table.
Further, RPR ring topology information where second member device is collected, by collected place RPR rings
Topology information is synchronized to first member device；
Second member device receives the RPR ring topology information of the first member device synchronization；
Number of nodes in the RPR network topological informations that second member device determines to collect is not less than synchronous RPR nets
Number of nodes in network topology information, then generate the second spot broadcasting table.
Further, the change of RPR network topological informations or the second member of local node that the first member device is collected
During the RPR network topological informations change of equipment synchronization, the first member device renewal spot broadcasting table.
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 and any modification, equivalent substitution, improvement and etc. within principle, done, should be included within the scope of protection of the invention.
Claims (9)
1. the message forwarding method in a kind of RPR networks, each node of the RPR networks is the first member device and the second one-tenth
The stack equipment that member's equipment is formed, it is characterised in that this method includes：
First broadcast table of the first member device generation comprising non-local broadcast identification；
Second broadcast table of the second member device generation comprising spot broadcasting mark；
The identification of first member device needs the ether network packet broadcasted；
The ether network packet for needing to broadcast is sent to the second member device by the first member device according to the first broadcast table；
Described to need the ether network packet broadcasted to be encapsulated as RPR wide by received according to the second broadcast table for second member device
Text is reported, is forwarded to by the outgoing interface of the second broadcast table；
Wherein, generating the method for the first broadcast table includes：First member device is determined in the RPR network topological informations of collection
Number of nodes be less than number of nodes in synchronous RPR network topological informations, generation the first broadcast table；
Generating the method for the second broadcast table includes：Second member device determines the section in the RPR network topological informations of collection
Points then generate the second broadcast table not less than the number of nodes in synchronous RPR network topological informations.
2. the method as described in claim 1, it is characterised in that before the first broadcast table is generated,
RPR ring topology information where first member device is collected, by collected place RPR ring topologies synchronizing information extremely
Second member device；
First member device receives the RPR ring topology information of the second member device synchronization.
3. the method as described in claim 1, it is characterised in that before the second broadcast table is generated,
RPR ring topology information where second member device is collected, by collected place RPR ring topologies synchronizing information extremely
First member device；
Second member device receives the RPR ring topology information of the first member device synchronization.
4. method as claimed in claim 2 or claim 3, it is characterised in that interstitial content is determined according to node identification.
5. the method as described in claim 1, it is characterised in that this method further comprises：Collected when the first member device
When RPR network topological informations change or the RPR network topological informations of the second member device synchronization of local node change, first
Member device updates spot broadcasting table.
6. a kind of message forwarding system, the system be applied to the node device as RPR networks by the first member device and the
The stack equipment that two member devices are formed, it is characterised in that；
First broadcast table of the first member device generation comprising non-local broadcast identification；
Second broadcast table of the second member device generation comprising spot broadcasting mark；
The first member device identification needs the ether network packet broadcasted；
The ether network packet for needing to broadcast is sent to the second member by first member device according to the first broadcast table
Equipment；
The received ether network packet for needing to broadcast is encapsulated as by second member device according to the second broadcast table
RPR broadcasting packets, are forwarded to by the outgoing interface of the second broadcast table；
Wherein, the number of nodes in the RPR network topological informations that first member device determines to collect is less than synchronous RPR networks
Number of nodes in topology information, generation the first broadcast table；
Number of nodes in the RPR network topological informations that second member device determines to collect is opened up not less than synchronous RPR networks
The number of nodes in information is flutterred, then generates the second broadcast table.
7. system as claimed in claim 6, it is characterised in that
First member device is before the first broadcast table is generated, RPR ring topology information where collecting, by the collection
Place RPR ring topologies synchronizing information to the second member device；
First member device receives the RPR ring topology information of the second member device synchronization.
8. system as claimed in claim 6, it is characterised in that before the second broadcast table is generated,
RPR ring topology information where second member device is collected, by collected place RPR ring topologies synchronizing information extremely
First member device；
Second member device receives the RPR ring topology information of the first member device synchronization.
9. system as claimed in claim 6, it is characterised in that the RPR network topological informations change that the first member device is collected
Or the second member device synchronization of local node the change of RPR network topological informations when, the renewal of the first member device is local wide
Broadcast table.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1725724A (en) * | 2004-07-22 | 2006-01-25 | 中兴通讯股份有限公司 | Automatic discovering method of resilient packet ring (RPR) equipment |
| CN101159653A (en) * | 2007-11-16 | 2008-04-09 | 华为技术有限公司 | Method and system for elastic packet ring network node to perform working mode switch |
| CN104009903A (en) * | 2014-06-05 | 2014-08-27 | 杭州华三通信技术有限公司 | Flow forwarding method and device for RPR network |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080050117A1 (en) * | 2006-06-12 | 2008-02-28 | Bikash Koley | Method and apparatus for photonic resiliency of a packet switched network |
| US20080002729A1 (en) * | 2006-06-29 | 2008-01-03 | Lucent Technologies, Inc. | Local add traffic exchange between separate East/West line cards in a half-MAC architecture for the resilient packet ring |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1725724A (en) * | 2004-07-22 | 2006-01-25 | 中兴通讯股份有限公司 | Automatic discovering method of resilient packet ring (RPR) equipment |
| CN101159653A (en) * | 2007-11-16 | 2008-04-09 | 华为技术有限公司 | Method and system for elastic packet ring network node to perform working mode switch |
| CN104009903A (en) * | 2014-06-05 | 2014-08-27 | 杭州华三通信技术有限公司 | Flow forwarding method and device for RPR network |
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