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Address updating method of subring without virtual channel
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An address update and virtual channel technology, applied in the field of data communication, can solve the problem that the node cannot refresh the address forwarding table, etc., to achieve the effect of improving performance
Inactive Publication Date: 2012-08-15
NANJING UNIV OF POSTS & TELECOMM
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[0018] The above address refresh mechanism can work well in a complete ring, but when this solution is applied to a sub-ring scenario, some nodes on the ring cannot refresh the address forwarding table
Method used
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Embodiment 1
[0070] Such as Figure 9a As shown, sub-ring 1 is in a fault-free state, and control node A blocks the e port, and periodically sends NR, RB packets to notify other nodes on the ring that "the ring protection link is blocked", and the NR, RB packets carry information. After the e ports of nodes B, C, D, E, and F on the ring receive the latest NR and RB messages, they find that in the message matches the saved by their own e ports. Different, these e ports all store .
[0071] exist Figure 9b , the link fails, node E blocks the forwarding function of the data message of the port w, refreshes the address forwarding table, deletes the saved by the ports on the two rings, and first continues along the e port The CLNB message is sent 3 times, and then the SF message is sent out periodically, and the message carries information.
[0072] After the w ports of nodes G, A, B, C and D receive the CLNB message, they all delete the saved by the ports on the two rings. Subseque...
Embodiment 2
[0077] Such as Figure 10a As shown in , sub-ring 1 is in a fault-free state, and the status of each node on the ring is the same as Figure 9a same.
[0078] exist Figure 10b During the process, manual switchover of MS is started on node E, node E blocks the data packet forwarding function of port w, refreshes the address forwarding table, deletes the saved by the ports on the two rings, and continuously sends 3 CLNB packets message, and then periodically send MS messages along the ports on the ring. The messages carry information.
[0079] After the w ports of nodes G, A, B, C and D receive the CLNB message, they delete the saved by their two ring ports.
[0080] After the w ports of nodes G, A, B, C and D receive the message from MS (carrying information), they compare with the previously stored , and find that both Inconsistent, the w ports of these nodes store information, and refresh the address forwarding table. In addition, after node A receives the MS mess...
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Abstract
The invention discloses an address updating method of a subring without a visual channel, comprising the following steps that: when the topology of a looped network is changed: a port of the looped network is blocked by a node, the node blocking the port refreshes an address forwarding table and also empties (Node_ID, BPR) stored on ports positioned on two rings; the node blocking the port continuously sends three CLNB messages, i.e. emptied (Node_ID, BPR) messages and then periodically sends protocol messages with address refreshing information; and the nodes positioned on the rings receive the CLNB messages and then empty the (Node_ID, BPR) stored on the ports positioned on two rings. The invention can overcome the defects of an address refreshing protocol of the traditional scheme and is very meaningful for enhancing the performance of the subring.
Description
technical field [0001] The invention relates to the field of data communication, in particular to a sub-ring address update method without a virtual channel. Background technique [0002] With the development of the Ethernet network in the direction of multi-service bearing, especially some services have higher and higher requirements on the reliability and real-time performance of the network, the Ethernet widely adopts ring networking to improve network reliability. In addition, in the ring protection method, fast protection switching is generally required, reaching less than 50 ms. Currently, such rapid protection switching technologies include RFC3619 of IETF (Internet Engineering Task Force, Internet Engineering Task Force), G.8032 of ITU-T (International Telecommunication Union, International Telecommunication Union), and the like. [0003] Regarding the definition of a sub-ring, international standards (such as ITU's G.8032) consider that a sub-ring (Sub-Ring) is an ...
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