CN102104523B - Data stream transmission method based on PBB-TE sectional tunnel, and node - Google Patents
Data stream transmission method based on PBB-TE sectional tunnel, and node Download PDFInfo
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Abstract
The invention provides a data stream transmission method based on a provider backbone bridge traffic engineering (PBB-TE) sectional tunnel, and a node. The method comprises the following steps of: configuring a PBB-TE which supports traffic engineering and a PBB-TE tunnel which supports the traffic engineering according to the difference between a node type and a link type; and transmitting a received message according to the configured PBB-TE tunnel. By the tunnel configuration method and the message transmission method, the system can conveniently maintain the tunnel maintenance, so the fault coupling among different rings is reduced, and the property of the Etheric multi-ring network is enhanced greatly.
Description
Technical field
The present invention relates to support the operator backbone bridging technology (PBB-TE, ProviderBackbone Bridge Traffic Engineering) of traffic engineering, relate in particular to a kind of data flow transmission method and node based on the PBB-TE sectional tunnel.
Background technology
Proposition along with carrier class Ethernet (CE, Carrier Ethernet) concept, meet the communication network demand, connection-oriented ethernet technology occurred---and operator backbone transmits (PBT, Provider BackboneTransport).The basis of PBT technology is the operator backbone bridge joint (PBB of IEEE 802.1ah definition, Provider Backbone Bridge) technology, IEEE calls the PBT technology operator backbone bridging technology (PBB-TE, Provider Backbone Bridge Traffic Engineering) of supporting traffic engineering.The PBB-TE technology is based on the PBB technology, its core is improved the PBB technology, the source device of CE inserts backbone network target MAC (Media Access Control) address (B-DA at the head of message, Backbone Destination MAC Address), the source MAC (B-SA of backbone network, Backbone Destination MAC Address), backbone network VLAN (B-VLAN, Backbone VLAN) and Service Instance mark (I-TAG, Service InstanceTAG).Forward-path between the source device of CE and purpose equipment is static configuration in advance, and middle CE equipment can B-DA and backbone network vlan identifier (B-VID) based in transmitting be forwarded Frame, and forward efficiency is high.
In order to make Ethernet reach telecommunications rank standard, PBB-TE adopts resist technology usually.The schematic diagram that Fig. 1 is the end-to-end linear protection in Ethernet tunnel in prior art; as shown in Figure 1; the end-to-end work tunnel of certain traffic engineering Service Instance is as shown in heavy line in Fig. 1; work tunnel be TN1:PE1 ← → P1 ← → P2 ← → P3 ← → PE2; wherein, the end that PE1 and PE2 are this tunnel example.Backup tunnel is as shown in thick dashed line in Fig. 1, the end-to-end backup tunnel of this traffic engineering Service Instance be TN2:PE1 ← → P5 ← → P6 ← → PE2, in order to distinguish above-mentioned work tunnel TN1 and backup tunnel TN2, when pre-configured, be that work tunnel TN1 specifies B-VLAN1 (as shown in chain-dotted line in Fig. 1), over run tunnel TN2 specifies B-VLAN2 (as shown in chain-dotted line in Fig. 1).PBB-TE adopts connectivity fault management (CFM, the Connectivity Fault Management) mechanism in IEEE 802.1ag to carry out the tunnel state in monitoring network constantly.Can automatically transfer to business on the backup path of setting up in advance when primary tunnel failure, realize the protecting tunnel technology.As shown in Figure 1, when end-to-end work tunnel TN1 breaks down, data flow can be switched on backup tunnel TN2.
In prior art, by send the connectedness that the connectivity check messages (CCM, Continuity Check Message) defined in IEEE 802.1ag detects tunnel in tunnel.Fig. 2 is Ethernet tunnel protecting tunnel schematic diagram end to end in prior art; as shown in Figure 2; heavy line is depicted as work tunnel; dotted line is depicted as backup tunnel; send mutually CCM along work tunnel TN1 and backup tunnel TN2 respectively between endpoint of a tunnel PE1 and PE2, the CCM of work tunnel and backup tunnel encapsulates respectively B-VLAN1 and B-VLAN2.This method has realized the complete trails protection in tunnel.
At present, on Single-ring network, each node on the ring is not configured and transmits the PBB-TE data message forwarded on ring, only the PBB-TE data message of pressed on ring is configured to forwarding entry.When node on the ring is received the data message of PBB-TE, the B-DA in message and the MAC Address of self are compared, if both are not identical, this node forwards soon this data message by data message with multicast mode and forwards from another ring upper port; If the B-DA in message is identical with the MAC Address of self, the PBB-TE data message is carried out to lower ring operation.
The transmission schematic diagram of the data flow that Fig. 3 is PBB-TE on the monocycle looped network, as shown in Figure 3, the single-point line means that B-VLAN4, double dot dash line mean B-VLAN5, and heavy line BCD means work tunnel, and thick dashed line BAFED means backup tunnel.Under the looped network non-failure conditions, Node B receives that subnet B0 is after the data message p of subnet D0 transmission, utilization<B, VLAN4, D > data message P is encapsulated to (data message after encapsulation will be at be designated<B, VLAN4, D > tunnel on transmit), then, Node B utilization<VLAN4, D > to search addresses forwarding table and obtain outbound port e, Node B forwards PBB-TE data message P from outbound port e; Node C, from the w port is received data message P, reads the target MAC (Media Access Control) address D of outer head, finds that target MAC (Media Access Control) address D is different from the MAC Address of self, and node C forwards data message P from another ring upper port e; Node D is from the w port is received data message P, the B-DA that finds PBB-TE data message P head is the MAC Address of self, node D peels off the head of PBB-TE data message P in the encapsulation of pressed on ring place, recovers data message p, then utilizes prior art that ring under data message p is forwarded to D0.
Existing realization is tunnel protecting method end to end, although can realize good protection to tunnel path, has the bad shortcoming of autgmentability, and particularly, when a ring is shared in a large amount of tunnels, it is more serious that problem can become.Main problem shows as: two end points of work tunnel and backup tunnel will send corresponding CCM message respectively on work tunnel and backup tunnel, and these CCM streams are mutually overlapping, taken a large amount of Internet resources.Fig. 4 is the schematic diagram that looped network is shared in a large amount of PBB-TE tunnel; as shown in Figure 4; on ring, each Ethernet exchanging node is connected with respectively 10000 subnets (Subnet); for the data flow to any two subnets is carried out segment protect; need mutually to send the CCM message between any two nodes on ring; the path of these CCM messages is mutually overlapping, has caused Internet resources to be slatterned in a large number.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of data flow transmission method and node based on the PBB-TE sectional tunnel, can reduce influencing each other between many rings, prevent that the fault that certain environment-development is given birth to from causing that other encircles the above pairing forwarding entry in tunnel and switches.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of data flow transmission method based on the PBB-TE sectional tunnel comprises:
According to the difference of node type and Linktype, the operator backbone bridging technology PBB-TE tunnel of traffic engineering is supported in configuration;
PBB-TE tunnel according to configuring, transmitted the message received.
Described configuration PBB-TE tunnel comprises: to the ring configuration preference level be connected with shared link;
According to destination node, the position on network is pressed on ring data flow configuration PBB-TE tunnel to node on the ring:
When destination node, on this ring and not on shared link the time, node on the ring is only pressed on ring data flow configuration PBB-TE tunnel on this ring;
When destination node on shared link and described node on the ring not on shared link, node on the ring only is pressed on ring data flow configuration PBB-TE tunnel on this ring;
When destination node and described node on the ring, all on shared link the time, node on the ring is only pressed on ring data flow configuration PBB-TE tunnel on the high priority ring be connected with shared link;
When destination node, not on this ring and not on shared link the time, at first node on the ring sets up the PBB-TE tunnel for the data flow of pressed on ring on this ring, and the terminal in tunnel is interconnecting nodes; Then, interconnecting nodes is peelled off the PBB-TE Tunnel Identifier of message, and the ring at the destination node place configures new tunnel for this message again.
Described configuration also comprises: described node on the ring is not carried out address forwarding entry configuration to crossing the ring message.
Described the message received transmitted and comprises:
Node is received the PBB-TE message, reads Tunnel Identifier<B-SMAC, B-DMAC, B-VID >, wherein, the source MAC that B-SMAC is backbone network, the target MAC (Media Access Control) address that B-DMAC is backbone network, B-VID is the backbone network vlan identifier;
Whether the node that judgement receives message is interconnecting nodes, if not, when MAC Address and the B-DMAC of the node that receives message is not identical, directly by this message, another from this ring encircles upper port and forwards, process ends; When identical, the node that receives message is carried out lower ring operation, process ends to the PBB-TE message;
If receiving the node of message is interconnecting nodes, when MAC Address and the B-DMAC of the node that receives message is not identical, directly by this message, the ring of another from this ring upper port forwards interconnecting nodes, process ends; When identical, interconnecting nodes is peelled off Tunnel Identifier<B-SMAC, B-DMAC, B-VID >, utilize the header of peelling off Tunnel Identifier<SMAC, DMAC, CVID > table look-up and forward the message received, wherein, the source MAC that SMAC is outer head, the target MAC (Media Access Control) address that DMAC is outer head, CVID is VLAN No. ID.
Described utilization peel off Tunnel Identifier header<SMAC, DMAC, CVID > tabling look-up and forwarding the message received comprises:
If the result obtained of tabling look-up described is lower central port, and interconnecting nodes will be peelled off the message of Tunnel Identifier and go out from the port repeat of finding, process ends;
If the result obtained of tabling look-up described is new Tunnel Identifier<B-SMAC, B-DMAC, B-VID > and corresponding outbound port, interconnecting nodes will be peelled off new Tunnel Identifier<B-SMAC on the message Reseal of Tunnel Identifier, B-DMAC, B-VID >, then this message is gone out from corresponding port repeat.
A kind of node, comprise configuration module and transport module, wherein,
Configuration module, for the difference according to node type and Linktype, the operator backbone bridging technology PBB-TE tunnel of traffic engineering is supported in configuration;
Transport module, the PBB-TE tunnel for according to configuring, transmitted the message received.
Described configuration module specifically for, to the ring configuration preference level be connected with shared link;
According to destination node, the position on network is pressed on ring data flow configuration PBB-TE tunnel to node on the ring:
When destination node, on this ring and not on shared link the time, node on the ring is only pressed on ring data flow configuration PBB-TE tunnel on this ring;
When destination node on shared link and described node on the ring not on shared link, node on the ring only is pressed on ring data flow configuration PBB-TE tunnel on this ring;
When destination node and described node on the ring, all on shared link the time, node on the ring is only pressed on ring data flow configuration PBB-TE tunnel on the high priority ring be connected with shared link;
When destination node, not on this ring and not on shared link the time, at first node on the ring sets up the PBB-TE tunnel for the data flow of pressed on ring on this ring, and the terminal in tunnel is interconnecting nodes; Then, interconnecting nodes is peelled off the PBB-TE Tunnel Identifier of message, and the ring at the destination node place configures new tunnel for this message again.
Described configuration module is further used for: described node on the ring is not carried out address forwarding entry configuration to crossing the ring message.
Described transport module specifically for:
Receive the PBB-TE message, read Tunnel Identifier<B-SMAC, B-DMAC, B-VID, wherein, the source MAC that B-SMAC is backbone network, the target MAC (Media Access Control) address that B-DMAC is backbone network, B-VID is the backbone network vlan identifier;
Whether the node that judgement receives message is interconnecting nodes, if not, when MAC Address and the B-DMAC of the node that receives message is not identical, directly by this message, another from this ring encircles upper port and forwards; When identical, the node that receives message is carried out lower ring operation to the PBB-TE message;
If receiving the node of message is interconnecting nodes, when MAC Address and the B-DMAC of the node that receives message is not identical, directly by this message, the ring of another from this ring upper port forwards interconnecting nodes; When identical, interconnecting nodes is peelled off Tunnel Identifier<B-SMAC, B-DMAC, B-VID >, utilize the header of peelling off Tunnel Identifier<SMAC, DMAC, CVID > table look-up and forward the message received, wherein, the source MAC that SMAC is outer head, the target MAC (Media Access Control) address that DMAC is outer head, CVID is VLAN No. ID.
Described transport module also for:
If the result obtained of tabling look-up described is lower central port, and interconnecting nodes will be peelled off the message of Tunnel Identifier and go out from the port repeat of finding;
If the result obtained of tabling look-up described is new Tunnel Identifier<B-SMAC, B-DMAC, B-VID > and corresponding outbound port, interconnecting nodes will be peelled off new Tunnel Identifier<B-SMAC on the message Reseal of Tunnel Identifier, B-DMAC, B-VID >, then this message is gone out from corresponding port repeat.
The technical scheme provided from the invention described above can be found out, comprises the difference according to node type and Linktype, and the operator backbone bridging technology PBB-TE tunnel of traffic engineering is supported in configuration; PBB-TE tunnel according to configuring, transmitted the message received.The transmission method of tunnel configuration method of the present invention and message is very easy to the maintenance of system to tunnel, has reduced the faults coupling between different rings, has greatly improved the performance of ether multi-ring network.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is the end-to-end linear protection in Ethernet tunnel in prior art;
Fig. 2 is Ethernet tunnel protecting tunnel schematic diagram end to end in prior art;
The transmission schematic diagram of the data flow that Fig. 3 is PBB-TE on the monocycle looped network;
Fig. 4 is the schematic diagram that looped network is shared in a large amount of PBB-TE tunnel;
Fig. 5 is the flow chart that the present invention is based on the data flow transmission method of PBB-TE sectional tunnel;
The flow chart of the tunnel configuration method that Fig. 6 is Ethernet multi-ring network of the present invention;
The flow chart of the transmission method that Fig. 7 is Ethernet multi-ring network PBB-TE data message of the present invention;
The schematic diagram that Fig. 8 is first embodiment of the invention;
The schematic diagram that Fig. 9 is second embodiment of the invention;
The schematic diagram that Figure 10 is third embodiment of the invention.
Embodiment
Fig. 5 is the flow chart that the present invention is based on the data flow transmission method of PBB-TE sectional tunnel, as shown in Figure 5, comprises the following steps:
Step 500: according to the difference of node type and Linktype, configuration PBB-TE tunnel.
Node type herein mainly comprises interconnecting nodes and non-interconnecting nodes, and wherein, interconnecting nodes is the crossed node between ring and ring.Linktype herein mainly comprises shared link and unshared link, wherein, and the link of shared link for owning together between ring and ring.
In this step, as shown in Figure 6, the flow chart of the tunnel configuration method that Fig. 6 is Ethernet multi-ring network of the present invention comprises the following steps the method in configuration PBB-TE tunnel:
Step 600: the ring configuration preference level that system pair is connected with shared link.
In this step, the priority of ring refers to, high priority ring and low priority ring are for shared link, and the priority of ring is in order to facilitate configuration purpose node and source node all to arrange in the tunnel on shared link.Such as the shared link of looped network Ring 1 and looped network Ring 2 is<A, B >, as<A, B > during link occurs fault, should only start a ring this link is protected, and should not be all right<A of two rings, B link protected.If determine 1 couple of shared link<A of looped network Ring, B > protected, can configure so looped network Ring 1 higher than the priority of looped network Ring 2.
Step 601: system is crossed the ring message to PBB-TE and is not configured forwarding entry, the forwarding entry only the PBB-TE tunnel configuration of pressed on ring matched.
Step 602: judge that destination node (being the terminal in tunnel) whether on shared link, if destination node, on shared link, enters step 603, otherwise enters step 606.
Step 603: judge that source node (being the starting point in tunnel) is whether on shared link.If described source node, on shared link, enters step 604, otherwise enter step 605.
Step 604: source node (being the starting point in tunnel) is only pressed on ring data flow configuration PBB-TE tunnel on the high priority ring be connected with shared link.
Step 605: source node is only pressed on ring data flow configuration PBB-TE tunnel (i.e. the forwarding entry of configuration pairing) on this ring.
Wherein, the pairing forwarding entry is: in 2 forwarding entrys of pairing, one is the forwarding entry used, and another is disabled forwarding entry, and the VLAN of both correspondences is not identical with the ring upper port.2 forwarding entrys of pairing are coordinated to use and can be protected the PBB-TE tunnel well.
Step 606: judge that source node (being the starting point in tunnel) whether on shared link, if described source node enters step 607 on shared link, otherwise enters step 608.
Step 607: source node is only pressed on ring data flow configuration PBB-TE tunnel on the ring at destination node place.
Step 608: judge that source node and destination node whether on same ring, if, on same ring, enter step 609, otherwise enter step 610.
Step 609: source node is only pressed on ring data flow configuration PBB-TE tunnel on this ring.
Step 610: at first source node sets up PBB-TE tunnel (wherein the terminal in tunnel is interconnecting nodes) for the data flow of pressed on ring on this ring, then interconnecting nodes is peelled off the PBB-TE Tunnel Identifier of message, and the ring at the destination node place configures new tunnel for this message again.
Wherein, the PBB-TE Tunnel Identifier is by tlv triple<B-SMAC, B-DMAC, B-VID > form, B-SMAC is the MAC Address of the start node in tunnel, and B-DMAC is the MAC Address of the endpoint node in tunnel, and B-VID is the backbone network VLAN ID.
From the method shown in Fig. 6, pre-configured PBB-TE tunnel is:
Node on the ring is not carried out address forwarding entry configuration to crossing ring message (destination address B-DMAC is not identical with the MAC Address of self);
According to destination node, the position on network is pressed on ring data flow configuration PBB-TE tunnel (the pairing forwarding entry is set) to node on the ring:
When destination node, on this ring and not on shared link the time, described node on the ring is only pressed on ring data flow configuration PBB-TE tunnel on this ring;
When destination node on shared link and described node on the ring not on shared link, described node on the ring only is pressed on ring data flow configuration PBB-TE tunnel on this ring;
When destination node and described node on the ring, all on shared link the time, described node on the ring is only pressed on ring data flow configuration PBB-TE tunnel on the high priority ring be connected with shared link;
When destination node not on this ring and not on shared link the time, at first described node on the ring sets up PBB-TE tunnel (the pairing forwarding entry is set) for the data flow of pressed on ring on this ring, the terminal in tunnel is interconnecting nodes, then described interconnecting nodes is peelled off the PBB-TE Tunnel Identifier of message, again configure new tunnel (for this message, the pairing forwarding entry is set at the interconnecting nodes place, and encapsulates new Tunnel Identifier for this message) at the ring at destination node place for this message.
Step 501: the PBB-TE tunnel according to configuring, transmitted the message received.
As shown in Figure 7, the flow chart of the transmission method that Fig. 7 is Ethernet multi-ring network PBB-TE data message of the present invention comprises this step specific implementation:
Step 700: node is received the PBB-TE message, reads Tunnel Identifier<B-SMAC, B-DMAC, B-VID >.
Step 701: whether the node that judgement receives message is interconnecting nodes, if not, enter step 702, otherwise enter step 705.
Step 702: the node that receives message judges that whether B-DMAC is identical with the MAC Address of self, if different, enters step 703, otherwise enters step 704.
Step 703: directly by this message, the ring of another from this ring upper port forwards the node that receives message.Process ends.
Step 704: described node is carried out lower ring operation to the PBB-TE message.
Step 705: interconnecting nodes judges that whether B-DMAC is identical with the MAC Address of self, if different, enters step 706, otherwise enters step 707.
Step 706: directly by this message, another ring upper port from the ring of destination node place forwards interconnecting nodes.
Step 707: interconnecting nodes is peelled off Tunnel Identifier, utilize the header peel off Tunnel Identifier<SMAC, DMAC, CVID > table look-up.
Step 708: interconnecting nodes, according to the result of finding, is processed in two kinds of situation.Situation 1, if the result of finding is lower central port, enter step 709; Situation 2, if that find is new Tunnel Identifier<B-SMAC, B-DMAC, B-VID > and corresponding outbound port, enter step 710.
Step 709: interconnecting nodes will be peelled off the message of Tunnel Identifier and go out from the port repeat of finding.
Step 710: interconnecting nodes will be peelled off new Tunnel Identifier<B-SMAC on the message Reseal of Tunnel Identifier, B-DMAC, B-VID >, then this message is gone out from corresponding port repeat.
Below in conjunction with embodiment, the inventive method is described in detail.The embodiment of the configuration that wherein the first embodiment and the second embodiment are tunnel under non-failure conditions and the transmission of message, the protection that the 3rd embodiment is tunnel under failure condition is switched.
In the embodiment shown in following Fig. 8～Figure 10, the node that looped network Ring1 comprises has A, B, C, D, E and F, have<A of the link comprised, B >,<B, C >,<C, D >,<D, E >,<E, F > and<F, A > link.The node that looped network Ring2 comprises has B, G, H, I, D and C, have<B of the link comprised, G >,<G, H >,<H, I >,<I, D >,<D, C > and<C, B > link, wherein<D, C > and<C, B > be the shared link of looped network Ring1 and looped network Ring2.The priority of priority ratio looped network Ring2 of supposing looped network Ring1 is high.
The schematic diagram that Fig. 8 is first embodiment of the invention, as shown in Figure 8, it is as shown in table 1 that node G has configured the pairing forwarding entry to flow1.
Table 1
Under the looped network non-failure conditions, the message P of flow1 by packed upper<G, I, 4 > tunnel label obtains message P1, this tunnel configuration is in looped network Ring2.Node H receives packed<G, I, 4 from the w port > after the message P1 of tunnel label, find that B-DMAC (I) is different from the MAC Address of self, node directly encircles upper port e by P1 from another and forwards; After node I receives message P1, find that B-DMAC (I) is identical with the MAC Address of self, node I peel off message P1<G, I, 4 >, after tunnel label obtains message P, utilize the head of message P to table look-up and obtain lower central port, and message P central port from this is forwarded.
Node B is as shown in table 2 to flow2 configuration pairing forwarding entry.
Table 2
Under the looped network non-failure conditions, on the message of flow2 is packed<B, C, 6 > tunnel label.Because Node B and node C are the nodes on shared link, and the priority of the priority ratio looped network Ring2 of looped network Ring1 is high, so the tunnel configuration between Node B and node C is in looped network Ring1.Node on the ring is similar with the processing of message P to flow1 to the processing of the message of flow2, repeats no more here.
The schematic diagram that Fig. 9 is second embodiment of the invention, in Fig. 9, flow3 is a transannular stream, the pairing forwarding entry that at first node A configures in looped network Ring1 for flow3 is as shown in table 3.This termination point of a tunnel is interconnecting nodes D.
Table 3
Interconnecting nodes D is that the pairing forwarding entry that configures in Ring1 of flow3 is as shown in table 4, and this termination point of a tunnel is interconnecting nodes I.
Table 4
As the message Q of flow3 after node A place pressed on ring, node A by message Q encapsulation<A, D, 8 > tunnel label obtains message Q1, node F and node E all from the e port is received message Q1, find that B-DMAC (D) is different from the MAC Address of self respectively, and node directly encircles upper port w by message Q1 from another and forwards, interconnecting nodes D is from the e port is received message Q1, find that B-DMAC (D) is identical with the MAC Address of self, interconnecting nodes D peels off tunnel label<A of message Q1, D, 8 > obtain message Q, then interconnecting nodes D uses traffic identifier<SMAC of message Q, DMAC, C-VID > (that is: flow3) table look-up, obtain new tunnel label<D, I, 8 >, then use this label to encapsulate and obtain message Q2 message Q, after node I receives message Q2, find that B-DMAC (I) is identical with the MAC Address of self, node I peels off tunnel label<D of message Q2, I, 8 > obtain message Q, according to message Q head<DMAC, C-VID > tabling look-up obtains lower central port, message Q central port from this is forwarded.
The schematic diagram that Figure 10 is third embodiment of the invention, as shown in figure 10, in the present embodiment, flow3 is a transannular stream, the pairing forwarding entry that at first node A configures in looped network Ring1 for flow3 is as shown in table 3.This termination point of a tunnel is interconnecting nodes D.
Suppose link<D, I > fault has occurred, node D and I periodically send the SF message along the intact port on looped network Ring2 respectively.After node on ring is received the SF message, affected node switches tunnel.The tunnel that the node D of below take goes to I on looped network Ring2 is described as example.After node D detects link failure, will match in forwarding entry<I, 8 > corresponding forwarding entry forbidding, activations<I simultaneously, 11 > correspondence forwarding entry, as shown in table 5.
Table 5
The tunnel path of flow3 on looped network Ring2 become " D → C → B → G → H → I " by " D → I ".System has realized localised protection (being that looped network Ring2 has realized protection to flow3) to flow3 on the ether multi-ring network, visible, utilizes the inventive method, and the fault effects of looped network Ring2 is not diffused in looped network Ring1.
In sum, the transmission method of tunnel configuration method of the present invention and message is very easy to the maintenance of system to tunnel, has reduced the faults coupling between different rings, has greatly improved the performance of ether multi-ring network.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. the data flow transmission method based on the PBB-TE sectional tunnel, is characterized in that, comprising:
According to the difference of node type and Linktype, the operator backbone bridging technology PBB-TE tunnel of traffic engineering is supported in configuration; Described configuration PBB-TE tunnel comprises: to the ring configuration preference level be connected with shared link;
According to destination node, the position on network is pressed on ring data flow configuration PBB-TE tunnel to node on the ring:
When destination node, on this ring and not on shared link the time, node on the ring is only pressed on ring data flow configuration PBB-TE tunnel on this ring;
When destination node on shared link and described node on the ring not on shared link, node on the ring only is pressed on ring data flow configuration PBB-TE tunnel on this ring;
When destination node and described node on the ring, all on shared link the time, node on the ring is only pressed on ring data flow configuration PBB-TE tunnel on the high priority ring be connected with shared link;
When destination node, not on this ring and not on shared link the time, at first node on the ring sets up the PBB-TE tunnel for the data flow of pressed on ring on this ring, and the terminal in tunnel is interconnecting nodes; Then, interconnecting nodes is peelled off the PBB-TE Tunnel Identifier of message, and the ring at the destination node place configures new tunnel for this message again;
PBB-TE tunnel according to configuring, transmitted the message received.
2. data flow transmission method according to claim 1, is characterized in that, described configuration also comprises: described node on the ring is not carried out address forwarding entry configuration to crossing the ring message.
3. data flow transmission method according to claim 1 and 2, is characterized in that, described the message received is transmitted and comprises:
Node is received the PBB-TE message, reads Tunnel Identifier<B-SMAC, B-DMAC, B-VID >, wherein, the source MAC that B-SMAC is backbone network, the target MAC (Media Access Control) address that B-DMAC is backbone network, B-VID is the backbone network vlan identifier;
Whether the node that judgement receives message is interconnecting nodes, if not, when MAC Address and the B-DMAC of the node that receives message is not identical, directly by this message, another from this ring encircles upper port and forwards, process ends; When identical, the node that receives message is carried out lower ring operation, process ends to the PBB-TE message;
If receiving the node of message is interconnecting nodes, when MAC Address and the B-DMAC of the node that receives message is not identical, directly by this message, the ring of another from this ring upper port forwards interconnecting nodes, process ends; When identical, interconnecting nodes is peelled off Tunnel Identifier<B-SMAC, B-DMAC, B-VID >, utilize the header of peelling off Tunnel Identifier<SMAC, DMAC, CVID > table look-up and forward the message received, wherein, the source MAC that SMAC is outer head, the target MAC (Media Access Control) address that DMAC is outer head, CVID is VLAN No. ID.
4. data flow transmission method according to claim 3, is characterized in that, described utilization peel off Tunnel Identifier header<SMAC, DMAC, CVID > tabling look-up and forwarding the message received comprises:
If the result obtained of tabling look-up described is lower central port, and interconnecting nodes will be peelled off the message of Tunnel Identifier and go out from the port repeat of finding, process ends;
If the result obtained of tabling look-up described is new Tunnel Identifier<B-SMAC, B-DMAC, B-VID > and corresponding outbound port, interconnecting nodes will be peelled off new Tunnel Identifier<B-SMAC on the message Reseal of Tunnel Identifier, B-DMAC, B-VID >, then this message is gone out from corresponding port repeat.
5. a node, is characterized in that, comprises configuration module and transport module, wherein,
Configuration module, for the difference according to node type and Linktype, the operator backbone bridging technology PBB-TE tunnel of traffic engineering is supported in configuration;
Described configuration module specifically for, to the ring configuration preference level be connected with shared link;
According to destination node, the position on network is pressed on ring data flow configuration PBB-TE tunnel to node on the ring:
When destination node, on this ring and not on shared link the time, node on the ring is only pressed on ring data flow configuration PBB-TE tunnel on this ring;
When destination node on shared link and described node on the ring not on shared link, node on the ring only is pressed on ring data flow configuration PBB-TE tunnel on this ring;
When destination node and described node on the ring, all on shared link the time, node on the ring is only pressed on ring data flow configuration PBB-TE tunnel on the high priority ring be connected with shared link;
When destination node, not on this ring and not on shared link the time, at first node on the ring sets up the PBB-TE tunnel for the data flow of pressed on ring on this ring, and the terminal in tunnel is interconnecting nodes; Then, interconnecting nodes is peelled off the PBB-TE Tunnel Identifier of message, and the ring at the destination node place configures new tunnel for this message again; Transport module, the PBB-TE tunnel for according to configuring, transmitted the message received.
6. node according to claim 5, is characterized in that, described configuration module is further used for: described node on the ring is not carried out address forwarding entry configuration to crossing the ring message.
7. according to the described node of claim 5 or 6, it is characterized in that, described transport module specifically for:
Receive the PBB-TE message, read Tunnel Identifier<B-SMAC, B-DMAC, B-VID, wherein, the source MAC that B-SMAC is backbone network, the target MAC (Media Access Control) address that B-DMAC is backbone network, B-VID is the backbone network vlan identifier;
Whether the node that judgement receives message is interconnecting nodes, if not, when MAC Address and the B-DMAC of the node that receives message is not identical, directly by this message, another from this ring encircles upper port and forwards; When identical, the node that receives message is carried out lower ring operation to the PBB-TE message;
If receiving the node of message is interconnecting nodes, when MAC Address and the B-DMAC of the node that receives message is not identical, directly by this message, the ring of another from this ring upper port forwards interconnecting nodes; When identical, interconnecting nodes is peelled off Tunnel Identifier<B-SMAC, B-DMAC, B-VID >, utilize the header of peelling off Tunnel Identifier<SMAC, DMAC, CVID > table look-up and forward the message received, wherein, the source MAC that SMAC is outer head, the target MAC (Media Access Control) address that DMAC is outer head, CVID is VLAN No. ID.
8. node according to claim 7, is characterized in that, described transport module also for:
If the result obtained of tabling look-up described is lower central port, and interconnecting nodes will be peelled off the message of Tunnel Identifier and go out from the port repeat of finding;
If the result obtained of tabling look-up described is new Tunnel Identifier<B-SMAC, B-DMAC, B-VID > and corresponding outbound port, interconnecting nodes will be peelled off new Tunnel Identifier<B-SMAC on the message Reseal of Tunnel Identifier, B-DMAC, B-VID >, then this message is gone out from corresponding port repeat.
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| CN101371525A (en) * | 2005-10-05 | 2009-02-18 | 北方电讯网络有限公司 | Provider backbone bridging - provider backbone transport internetworking |
| CN101499951A (en) * | 2008-02-01 | 2009-08-05 | 华为技术有限公司 | Tunnel configuration method, virtual access node, virtual edge node and system |
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| CN101371525A (en) * | 2005-10-05 | 2009-02-18 | 北方电讯网络有限公司 | Provider backbone bridging - provider backbone transport internetworking |
| CN101499951A (en) * | 2008-02-01 | 2009-08-05 | 华为技术有限公司 | Tunnel configuration method, virtual access node, virtual edge node and system |
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