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Equal cost tree transfer method and device

A technology of equivalence tree and migration process, applied in the field of valence tree) migration, which can solve the problems of no calculation, failure of smooth migration of ECT, and interruption of flow.

Active Publication Date: 2014-03-12
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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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 equal cost tree transfer method and equipment. The method comprises the steps of when BCB (backbone core bridge) equipment detects that any one BEB (backbone edge bridge) equipment does not support ECT (equal cost tree) smooth transfer in the ECT transfer process of an I-SID (backbone service instance identifier), judging whether the unicast forwarding table entry of the I-SID in a new B-VLAN (backbone-virtual local area network) taking the BEB equipment as a source is calculated or not, if so, directly deleting the unicast forwarding table entry of the I-SID in the old B-VLAN taking the BEB equipment as the source, if not, after receiving an LSP (link state protocol) message sent by the BEB equipment, calculating a unicast forwarding table entry of the I-SID in the new B-VLAN taking the BEB equipment as the source, sending the calculated table entry to a data plane, and deleting the unicast forwarding table entry of the I-SID in the old B-VLAN taking the BEB equipment as the source at the same time. The cutoff phenomenon during ECT transfer is reduced.

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). Intermediate System, intermediate system to intermediate system) to share the link status in the network, each node in the network calculates the shortest path between each node in parallel, avoiding the instability caused by the use of STP (Spanning Tree Protocol, Spanning Tree Protocol) And the inefficiency of partial link utilization. [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 pla...

Claims

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Application Information

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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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