CN101047644A - Network system, shortest route establishing and broadcast message transmission method - Google Patents
Network system, shortest route establishing and broadcast message transmission method Download PDFInfo
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- CN101047644A CN101047644A CNA2007100277989A CN200710027798A CN101047644A CN 101047644 A CN101047644 A CN 101047644A CN A2007100277989 A CNA2007100277989 A CN A2007100277989A CN 200710027798 A CN200710027798 A CN 200710027798A CN 101047644 A CN101047644 A CN 101047644A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
This invention discloses two-layer network equipment including: a set-up and process unit of shortest route for setting up a message transmission shortest route between its own and other two-layer network equipment and a broadcast message transmitting and process unit used in selecting the broadcast messages from the shortest route of the broadcast source to transmit them, besides, this invention provides a method for setting up network systems and shortest route and transmitting broadcast messages. This invention sets up a shortest route for transmitting messages among edge network devices and each time when the edge devices transmit messages, they carry out the transmission according to the shortest route so as to avoid loop routes.
Description
Technical field
The present invention relates to the double layer network technology, in particular, the present invention relates to a kind of network system, shortest path foundation and broadcast message transmission method.
Background technology
In double layer network, broadcasting packet and unknown medium (MAC) message all adopt broadcast mode to transmit, in case form loop in the network, then are easy to cause broadcast storm; For example in private virtual lan business (H-VPLS) the networking process of stratification, in order to guarantee reliability, often require user side edge device (UPE) dual-homed dual-homed with network side edge device (NPE), and in the broadcasting packet repeating process, loop may appear in network, thereby cause broadcast storm, for this reason, need break ring to network, for example, present broken loop technique such as the mVPLS technology that in the HVPLS network, often adopts, it adopts and starts specific managing virtual exchange example (VSI), and the operation Signaling Transfer Point comes detection loop on Management virtual switching instance, by blocking related simultaneously other the professional VSI of certain VSI interface, thereby reach brokenly the purpose of ring, can avoid occurring broadcast storm.But in the mVPLS technology, network convergence speed mainly is because there is the slow-footed problem of network convergence in the restriction (relevant with interstitial content, generally in the submicrosecond rank) of STP algorithm; In addition,, promptly can not realize the service traffics load balancing, therefore, when networking, be subjected to certain limitation because current mVPLS technology is not supported many examples.
Summary of the invention
The technical problem that the embodiment of the invention solves provides a kind of network system, shortest path is set up and broadcast message transmission method, loop occurs to avoid network, and then avoids occurring broadcast storm.
For addressing the above problem, the two-layer network device of the embodiment of the invention comprises:
Shortest path is set up processing unit, is used to set up the message forwarding shortest path between this two-layer network device and other two-layer network devices;
The broadcasting packet forward processing unit is used to select broadcast forwarding from the broadcasting packet of the message forwarding shortest path of broadcast source end.
Correspondingly, a kind of network system of the embodiment of the invention comprises user side edge device and the network side edge device that links to each other with described user side edge device, and wherein said user side edge device comprises:
User side edge device shortest path is set up processing unit, is used to set up the message forwarding shortest path between this user side edge device and other user side edge devices or the network side edge device;
User side edge device broadcasting packet processing unit is used for message to be broadcast is broadcasted or receive the broadcasting packet that sends on the message forwarding shortest path from source end subscriber lateral edges equipment by the message forwarding shortest path;
Described network side edge device comprises:
Network side edge device shortest path is set up processing unit, is used to set up the shortest path that E-Packets between present networks lateral edges equipment and other network side edge devices or the user side edge device;
Network side edge device broadcasting packet forward processing unit is used to select broadcast forwarding from the broadcasting packet of the message forwarding shortest path of broadcast source end subscriber lateral edges equipment.
Correspondingly, a kind of message forwarding shortest path method for building up of the embodiment of the invention, this method mainly comprises:
Set up the two-way virtual link of this edge device and other edge devices;
On the two-way virtual link of setting up, set up algorithm and set up message forwarding shortest path between this edge device and other edge devices according to shortest path.
Correspondingly, the retransmission method of a kind of broadcasting packet of the embodiment of the invention, this method comprises:
Whether the broadcasting packet that detect to receive is from the message forwarding shortest path of the source end margin equipment that sends broadcasting packet;
If broadcasting packet then forwards broadcasting packet from the message forwarding shortest path of source end margin equipment according to broadcast mode.
Correspondingly, a kind of broadcast message transmission method of the embodiment of the invention, this method mainly comprises:
Source end margin equipment sends broadcasting packet according to the message forwarding shortest path to place end margin equipment;
Transmit the middle virtual link failure of described broadcasting packet, the starting point edge device of the middle virtual link of described fault is sent to described broadcasting packet the terminal edge equipment of backup virtual link by the backup virtual link;
The terminal edge equipment of backup virtual link is sent to place end margin equipment according to the shortest path from this terminal edge equipment to place end margin equipment with broadcasting packet.
According to embodiments of the invention, at first in network, set up the message forwarding shortest path between edge device, when the edge device in each network E-Packets, all carry out according to the message forwarding shortest path, therefore, can avoid occurring loop in the network, and then avoid broadcast storm.
Description of drawings
Fig. 1 is a specific embodiment schematic diagram of two-layer network device of the present invention;
Fig. 2 is the H-VPLS network system schematic diagram of the specific embodiment of the invention;
Fig. 3 is a specific embodiment schematic diagram of user-end provider edge in the H-VPLS network system shown in Figure 2;
Fig. 4 is a specific embodiment schematic diagram of NPE equipment in the H-VPLS network system shown in Figure 2;
Fig. 5 is a specific embodiment flow chart of the retransmission method of broadcasting packet of the present invention;
Fig. 6 is that the present invention carries out the specific embodiment schematic diagram that broadcasting packet is transmitted when the PW fault.
Embodiment
With reference to figure 1, the two-layer network device of present embodiment includes: shortest path is set up processing unit 11 and broadcasting packet forward processing unit 12, wherein
Shortest path is set up processing unit 11, and shortest path described in the present embodiment is set up processing unit 11 and is mainly used in the message forwarding shortest path of setting up between this two-layer network device and other two-layer network devices; During specific implementation, as a specific embodiment, described shortest path is set up processing unit 11 and can be comprised:
Virtual link (PW) is set up unit 111, and described PW sets up unit 111 and is mainly used in the two-way PW that sets up between this two-layer network device and other two-layer network devices;
Shortest path is set up unit 112, and described shortest path is set up unit 112 and is mainly used on the two-way PW that sets up and sets up algorithm according to shortest path and set up message forwarding shortest path between this two-layer network device and other two-layer network devices.
In addition, broadcasting packet forward processing unit 12, the forward processing unit of broadcasting packet described in the present embodiment 12 is mainly used in selection and broadcasts forwarding from the broadcasting packet of the message forwarding shortest path of broadcast source end, during specific implementation, as a specific embodiment, described broadcasting packet forward processing unit 12 can comprise:
Detecting unit 121, whether be message from the message forwarding shortest path of broadcast source end, and indicate described retransmission unit 121 to broadcast forwarding in testing result when being if being mainly used in and detecting message to be transmitted;
Retransmission unit 122 is mainly used in message is forwarded according to broadcast mode.
Need illustrate, shortest path described in the above-mentioned present embodiment is set up shortest paths such as can adopting intermediate system to intermediate syst (ISIS) algorithm when processing unit 11 is specifically set up the message forwarding shortest path and is set up algorithm and set up, it is three layers of route technology that shortest paths such as ISIS algorithm are set up algorithm, by link circuit condition to this machine of neighbor advertisement, each equipment in the shortest path zone that makes is all known network topology, set up algorithm by shortest path, on certain shortest path node, know at which interface and E-Packet according to the message forwarding shortest path, in the present embodiment with two-layer network device abstract be the shortest path node, and set up each internodal message forwarding shortest path, transmit broadcasting packet according to the message forwarding shortest path then, thereby can not form loop, can avoid forming broadcast storm, and network convergence speed is also fast, can reach switching of 50ms, reach the carrier level reliability requirement; In addition, owing to support many examples, can realize the service traffics load balancing, therefore, the networking restriction is also less, and network can adopt multiple mode to dispose.
With specific embodiment network system of the present invention is described below, be that example describes specifically with H-VPLS double layer network system, with reference to figure 2, the network equipment two-layer network devices such as (NPE) that comprises user side edge device (UPE) and link to each other in the H-VPLS double layer network system of present embodiment with described user-end provider edge.
With reference to figure 3, described user-end provider edge can comprise: the user-end provider edge shortest path is set up processing unit 21 and user-end provider edge broadcasting packet processing unit 22:
The shortest path of user-end provider edge described in the present embodiment is set up processing unit, be mainly used in the message forwarding shortest path of setting up between this user-end provider edge and other user-end provider edge or the NPE equipment, during specific implementation, as a specific embodiment, described user-end provider edge shortest path is set up processing unit and can be comprised:
PW sets up unit 211, is used to set up the two-way PW between this user-end provider edge and other NPE equipment or the user-end provider edge;
Shortest path is set up unit 212, is used on the two-way PW that sets up setting up according to shortest path algorithm and sets up message forwarding shortest path between this user-end provider edge and other NPE equipment or the user-end provider edge.
In addition, the broadcasting packet of user-end provider edge described in present embodiment processing unit 22 is mainly used in message to be broadcast is broadcasted or receive the broadcasting packet that sends on the message forwarding shortest path from source end user-end provider edge by the message forwarding shortest path;
With reference to figure 4, described NPE equipment can comprise: NPE equipment shortest path is set up processing unit 31 and NPE device broadcasts message forward processing unit 32:
The equipment of NPE described in present embodiment shortest path is set up processing unit 31, is mainly used in the shortest path of setting up between this NPE equipment and other NPE equipment or the user-end provider edge that E-Packets; During specific implementation, as a specific embodiment, described NPE equipment shortest path is set up processing unit and can be comprised:
PW sets up unit 311, is used to set up the two-way PW between this NPE equipment and other NPE equipment or the user-end provider edge;
Shortest path is set up unit 312, is used on the two-way PW that sets up setting up according to shortest path algorithm and sets up message forwarding shortest path between this NPE equipment and other NPE equipment or the user-end provider edge.
In addition, the device broadcasts of NPE described in present embodiment message forward processing unit 32 is mainly used in selection and broadcasts forwarding from the broadcasting packet of the message forwarding shortest path of broadcast source end user-end provider edge.
Need illustrate that as a specific embodiment, adopt the ISIS algorithm if above-mentioned shortest path is set up algorithm, the shortest path of described user-end provider edge or NPE equipment is set up the unit and all can be comprised:
The allocation process unit according to the ISIS algorithm, distributes priority and Cost and ISIS Route Distinguisher for the PW that sets up, and wherein the ISIS Route Distinguisher of PE equipment is the MAC Address of this PE equipment;
ISIS example operation unit is used to move the ISIS example, obtains the message forwarding shortest path between this PE equipment and other NPE equipment or the user-end provider edge.
Setting up algorithm employing ISIS algorithm with shortest path below is example, and the flow process of setting up the message forwarding shortest path is described, specifically mainly comprises following flow process:
At first, with two-layer network device UPE and NPE device abstract is the ISIS domain node, set up in the network between each PE equipment (be user-end provider edge with NPE equipment between, between user-end provider edge and the user-end provider edge and between NPE equipment and the NPE equipment) PW be connected (being two-way PW);
Then, on the two-way PW that sets up, set up algorithm and set up message forwarding shortest path between this PE equipment and other PE equipment according to shortest path, promptly be according to the ISIS algorithm in the present embodiment, PW is distributed the ISIS Route Distinguisher respectively, Cost value and corresponding priority level, wherein the ISIS Route Distinguisher of PE equipment can adopt the MAC Address of this PE equipment, at UPE, the PW of NPE equipment goes up operation ISIS example, can obtain UPE, the shortest path that message is transmitted between the NPE equipment, wherein, in order to prevent equal-cost route, can go up different PW to same PE and give different priority.
For example, as shown in Table 1, by the ISIS algorithm, can set up the message forwarding shortest path that UPE1 goes up each PE equipment, be PW1-PW2-PW3 as the shortest forward-path from UPE1 to UPE2
Table one
| Purpose PE | Next jumping | The path |
| UPE2 | PW1 | PW1-PW2-PW3 |
| NPE1 | PW1 | PW1 |
| NPE2 | PW6 | PW6 |
| … | … |
Need to prove, the ISIS Route Distinguisher of PE equipment adopts the MAC Address of this PE equipment in the foregoing description, for inlet user-end provider edge (being source end user-end provider edge), in the time of downlink broadcast, the MAC Address that can carry the UPE node by PWE3 control field (Control Word), promptly the user-end provider edge broadcasting packet processing unit described in the present embodiment also can comprise:
The MAC Address adding device is used for the MAC Address of carrying user-end provider edge by the control field of PW when sending broadcasting packet;
And whether the broadcasting packet forward processing unit of described NPE equipment can determine message from the message forwarding shortest path according to the MAC Address of carrying in the message, and promptly during specific implementation, described NPE device broadcasts message forward processing unit also can comprise:
Acquiring unit is used to obtain the source end MAC Address of the message that receives;
Whether judging unit, the forward-path of judging the message receive according to described source end MAC Address be from the message forwarding shortest path of source end;
The testing result determining unit, if the judgment unit judges result is for being, the message of then determining to receive is from the message forwarding shortest path, if the judgment unit judges result determines then that for not the message of reception is not from the message forwarding shortest path;
Retransmission unit is if testing result determining unit judged result is for being that message is forwarded according to broadcast mode.
With reference to figure 5, the following describes the retransmission method of specific embodiment of the invention broadcasting packet, mainly comprise following processing procedure:
Whether step s101, the broadcasting packet that detect to receive be from the message forwarding shortest path of the source end PE equipment that sends broadcasting packet; During specific implementation, if the shortest path that message is transmitted is to set up according to the ISIS algorithm, and the MAC Address of ISIS Route Distinguisher employing PE equipment, then can be according to the definite broadcasting packet that receives of following flow process whether from the message forwarding shortest path, that is:
At first, obtain the MAC Address of the source end PE equipment of the message that receives;
Whether the forward-path of judging the message that receives according to the MAC Address of described source end PE equipment is from the message forwarding shortest path of source end PE equipment then; If judged result is for being, the message of then determining to receive is from the message forwarding shortest path, if judged result determines then that for not the message of reception is not from the message forwarding shortest path.
Step s102 is if broadcasting packet then forwards broadcasting packet from the message forwarding shortest path of source end PE equipment according to broadcast mode.
Step s103 if broadcasting packet is not the message forwarding shortest path from source end PE equipment, then abandons this message or carries out other processing, repeats no more here.
In addition, need illustrate, when PE equipment room link breaks down, above-mentioned method by message forwarding shortest path forwarding broadcasting packet also is suitable for, for example, between pre-configured user-end provider edge and the backup PW of NPE equipment room, during PW fault between this user-end provider edge and NPE equipment, link switchover can be ensured reliability to the fast quick-recovery of PW fault on the PW of backup, and on backup PW, can carry out message according to the method for message forwarding shortest path equally and transmit, be that example describes with PW fault in the message repeating process below:
At first: source end PE equipment sends broadcasting packet according to the message forwarding shortest path to place end PE equipment;
Wherein, if transmit the middle PW fault of described broadcasting packet, then can inquire about the backup PW that whether is provided with described middle PW, if having, the starting point PE equipment of the middle PW of described fault can be sent to described broadcasting packet the terminal PE equipment of backup PW by backup PW;
Then, the terminal PE equipment of described backup PW can be sent to place end PE equipment with broadcasting packet according to the shortest path from this end PE equipment to place end PE equipment, during specific implementation, the terminal PE equipment that the starting point PE equipment of middle PW that can be by described fault is indicated backup PW simultaneously transmits the broadcasting packet realization according to the message forwarding shortest path to place end PE equipment of this end PE equipment, also can default setting, repeat no more here.
With reference to figure 6, for example, the MAC address entries on UPE and NPE disposes next and jumps backup, and for example the backup of the PW1 on UPE1 is PW3; In case the PW1 fault, UPE1 inquires about next according to the message of receiving and jumps PW, detects next and jumps the PW inefficacy, whether then check has backup PW, if do not have, and dropping packets then, if there is backup PW the message that receives to be forwarded, be promptly to be to E-Packet in this example by PW3 by backup PW.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1, a kind of two-layer network device is characterized in that, comprising:
Shortest path is set up processing unit, is used to set up the message forwarding shortest path between this two-layer network device and other two-layer network devices;
The broadcasting packet forward processing unit is used to select broadcast forwarding from the broadcasting packet of the message forwarding shortest path of broadcast source end.
2, two-layer network device according to claim 1 is characterized in that, described shortest path is set up processing unit and comprised:
Virtual link is set up the unit, is used to set up the two-way virtual link between this two-layer network device and other two-layer network devices;
Shortest path is set up the unit, is used on the two-way virtual link of setting up setting up according to shortest path algorithm and sets up message forwarding shortest path between this two-layer network device and other two-layer network devices.
3, two-layer network device according to claim 1 and 2 is characterized in that, described broadcasting packet forward processing unit comprises:
Retransmission unit is used for message is forwarded according to broadcast mode;
Detecting unit is used to detect message to be transmitted and whether is the message from the message forwarding shortest path of broadcast source end, and indicates described retransmission unit to broadcast forwarding in testing result when being.
4, two-layer network device according to claim 3 is characterized in that, described shortest path is set up the unit and comprised:
The allocation process unit, according to the intermediate system to intermediate syst algorithm, distribute priority and Cost and intermediate system to intermediate syst Route Distinguisher for the virtual link of setting up, wherein the intermediate system to intermediate syst Route Distinguisher of two-layer network device is the MAC Address of this two-layer network device;
Intermediate system to intermediate syst example operation unit is used to move the Intermediate System-to-Intermediate System protocol instance, obtains the shortest path that E-Packets between this two-layer network device and other two-layer network devices;
Described detecting unit comprises:
Acquiring unit is used to obtain the MAC Address of the source end two-layer network device of the broadcasting packet that receives;
Judging unit judges that according to described source end MAC Address whether the forward-path of the message receive is the message forwarding shortest path from source end two-layer network device;
The testing result determining unit, if the judgment unit judges result is for being, then determine the message forwarding shortest path of the message of reception from source end two-layer network device, if the judgment unit judges result is not, the message of then determining reception is not the message forwarding shortest path from source end two-layer network device.
5, a kind of network system comprises user side edge device and the network side edge device that links to each other with described user side edge device, it is characterized in that described user side edge device comprises:
User side edge device shortest path is set up processing unit, is used to set up the message forwarding shortest path between this user side edge device and other user side edge devices or the network side edge device;
User side edge device broadcasting packet processing unit is used for message to be broadcast is broadcasted or receive the broadcasting packet that sends on the message forwarding shortest path from source end subscriber lateral edges equipment by the message forwarding shortest path;
Described network side edge device comprises:
Network side edge device shortest path is set up processing unit, is used to set up the shortest path that E-Packets between present networks lateral edges equipment and other network side edge devices or the user side edge device;
Network side edge device broadcasting packet forward processing unit is used to select broadcast forwarding from the broadcasting packet of the message forwarding shortest path of broadcast source end subscriber lateral edges equipment.
6, a kind of message forwarding shortest path method for building up is characterized in that, comprising:
Set up the two-way virtual link of this edge device and other edge devices;
On the two-way virtual link of setting up, set up algorithm and set up message forwarding shortest path between this edge device and other edge devices according to shortest path.
7, message forwarding shortest path method for building up according to claim 6 is characterized in that, describedly sets up the message forwarding shortest path that algorithm sets up between this edge device and other edge devices according to shortest path comprise on the two-way virtual link of setting up:
According to the intermediate system to intermediate syst algorithm, distribute priority and Cost and intermediate system to intermediate syst Route Distinguisher for the virtual link of setting up, wherein the intermediate system to intermediate syst Route Distinguisher of edge device is the MAC Address of this edge device, and operation Intermediate System-to-Intermediate System protocol instance, obtain the shortest path that E-Packets between this edge device and other edge devices.
8, a kind of retransmission method of broadcasting packet is characterized in that, comprising:
Whether the broadcasting packet that detect to receive is from the message forwarding shortest path of the source end margin equipment that sends broadcasting packet;
If broadcasting packet then forwards broadcasting packet from the message forwarding shortest path of source end margin equipment according to broadcast mode.
9, the retransmission method of broadcasting packet according to claim 8 is characterized in that, whether the broadcasting packet that described detection receives comprises from the shortest path of the source end margin equipment that sends broadcasting packet:
Obtain the MAC Address of the source end margin equipment of the message that receives;
Whether the forward-path of judging the message that receives according to the MAC Address of described source end margin equipment is from the message forwarding shortest path of source end margin equipment;
If judged result is for being, the message of then determining to receive is from the message forwarding shortest path, if judged result determines then that for not the message of reception is not from the message forwarding shortest path.
10, a kind of broadcast message transmission method is characterized in that, comprising:
Source end margin equipment sends broadcasting packet according to the message forwarding shortest path to place end margin equipment;
Transmit the middle virtual link failure of described broadcasting packet, the starting point edge device of the middle virtual link of described fault is sent to described broadcasting packet the terminal edge equipment of backup virtual link by the backup virtual link;
The terminal edge equipment of backup virtual link is sent to place end margin equipment according to the shortest path from this terminal edge equipment to place end margin equipment with broadcasting packet.
11, broadcast message transmission method according to claim 10, it is characterized in that the starting point edge device of the middle virtual link of described fault is indicated the message forwarding shortest path transmission broadcasting packet to place end margin equipment of the terminal edge equipment of backup virtual link according to this terminal edge equipment simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100277989A CN101047644A (en) | 2007-04-28 | 2007-04-28 | Network system, shortest route establishing and broadcast message transmission method |
| PCT/CN2008/070173 WO2008131654A1 (en) | 2007-04-28 | 2008-01-24 | A network system and a method for establishing the shortest path and transmitting the broadcast packet |
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| CNA2007100277989A CN101047644A (en) | 2007-04-28 | 2007-04-28 | Network system, shortest route establishing and broadcast message transmission method |
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| WO (1) | WO2008131654A1 (en) |
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| WO2008131654A1 (en) * | 2007-04-28 | 2008-11-06 | Huawei Technologies Co., Ltd. | A network system and a method for establishing the shortest path and transmitting the broadcast packet |
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| CN100555993C (en) * | 2006-06-01 | 2009-10-28 | 杭州华三通信技术有限公司 | The optimizing load-sharing route method and apparatus of network business flow |
| CN101047644A (en) * | 2007-04-28 | 2007-10-03 | 华为技术有限公司 | Network system, shortest route establishing and broadcast message transmission method |
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| CN104753782B (en) * | 2013-12-26 | 2018-07-03 | 华为技术有限公司 | A kind of method and apparatus that message is sent in transparent interconnection of lots of links interconnect TRILL network |
| CN104065571A (en) * | 2014-06-05 | 2014-09-24 | 福建星网锐捷网络有限公司 | Broadcast message processing method, device and system |
| CN104065571B (en) * | 2014-06-05 | 2017-11-03 | 福建星网锐捷网络有限公司 | A kind of broadcasting packet processing method, apparatus and system |
| CN108881054A (en) * | 2018-09-13 | 2018-11-23 | 新华三技术有限公司 | Message forwarding method and device |
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| WO2008131654A1 (en) | 2008-11-06 |
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