Equivalent tree migration method and device

A technology of equivalent tree and migration process, applied in the field of valence tree) migration, which can solve the problems of ECT smooth migration failure, non-calculation, cut-off, etc.

Active Publication Date: 2017-05-10
NEW H3C TECH CO LTD
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Problems solved by technology

At the same time, because other BEB devices are waiting for the migration of device C, they have not been able to deliver the tunnel information of I-SID1000 and B-VLAN2, and the BCB device may not yet calculate the forwarding entries of I-SID1000 and B-VLAN2. resulting in a prolonged interruption
[0014] It can be seen that when there are BEB devices that do not support ECT smooth migration in the network, the ECT smooth migration of the entire network fails, resulting in a long-term disconnection

Method used

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  • Equivalent tree migration method and device

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Embodiment Construction

[0071] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0072] By analyzing the existing ECT migration process, the inventor found that in the ECT migration process, there are the following three types of devices, although they support the I-SID corresponding to ECT migration, they cannot achieve ECT smooth migration:

[0073] 1. BEB devices that do not support ECT smooth migration at all

[0074] During the ECT migration process, the LSP message initially sent only carries the old mapping relationship between B-VLAN and I-SID, while only the new mapping relationship between B-VLAN and I-SID is sent during the migration process. The LSP message, that is, the LSP message sent during the migration process will not carry the new B-VLAN and the mapping relationship between the old B-VLAN and the I-SID at the same time.

[0075] 2. The LSP packets sent during the ECT migration used to carry th...

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Abstract

The invention provides an equivalence tree migration method and equipment. The method includes: when the BCB device finds that any BEB device does not support ECT smooth migration during the ECT migration process of the I-SID, it is judged whether the I-SID has been calculated using the BEB device as the source and the I-SID in the new B-VLAN. Unicast forwarding entry, if so, directly delete the unicast forwarding entry with the BEB device as the source and the I-SID in the old B-VLAN; otherwise, after receiving the LSP message sent by the BEB device, Calculate the unicast forwarding entry of the I‑SID in the new B‑VLAN with the BEB device as the source, deliver the calculated entry to the data plane, and delete the I‑SID with the BEB device as the source Unicast forwarding entry in the old B‑VLAN. The invention reduces the disconnection phenomenon when ECT migrates.

Description

technical field [0001] The present invention relates to the technical field of SPB (Shortest Path Bridging, shortest path bridge), in particular to an ECT (Equal Cost Tree, equivalent tree) migration method and device. Background technique [0002] SPB is one of the Ethernet standards defined by IEEE802.1aq. It is a further extension of MSTP (Multi Spanning Tree Protocol, Multiple Spanning Tree Protocol). System, intermediate system to intermediate system) to share the link state in the network, each node in the network calculates the shortest path between each node in parallel, avoiding the instability and partial Insufficient link utilization efficiency is low. [0003] IEEE802.1aq defines two SPB modes: VLAN mode (SPBV) and MAC-in-MAC mode (SPBM). SPBM inherits the 802.1ah packet encapsulation format and the idea of ​​multiple service instances, but redefines the forwarding mode of the data plane and the control plane, and uses SPB-ISIS to learn link state information, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/46H04L12/751H04L45/02
Inventor 屈维亮杨裕斌周万胡丽波
Owner NEW H3C TECH CO LTD
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