Switch and switch system

The invention provides a method and a device for computing an MSTP domain. The method is applied to a network forwarding device in an MSTP, and comprises the steps of when a local network forwarding device receives an MSTP protocol message sent by an opposite-end network forwarding device, judging that whether the MSTP message meets a preset triggering condition; and if yes, re-computing an interface role according to the MSTP protocol message. Therefore, the computation quantity can be reduced when the MSTP is subjected to domain switching, and the convergence rate of the MSTP network is improved.

Method and device for computing MSTP domain

The invention provides a method for multiple spanning tree instance fast transfer and an exchanger. When an existing multiple spanning tree instance (MSTI) needs to be transferred to a forwarding state from a blocking state, between MST domains, the method is that: a downstream multiple spanning tree (MST) domain boundary exchanger receives a handshake request message from an upstream MST domain boundary exchanger, the handshake request message is a handshake request message which aims at the existing MSTI needing to be transferred to the forwarding state from the blocking state, then the downstream MST domain boundary exchanger returns a handshake response message; the MSTI is transferred into the forwarding state after the upstream MST domain boundary exchanger receives the handshake response message. With the proposal of the invention, the upstream MST domain boundary exchanger can quickly transfer the MSTI with the changed domain root to the forwarding state without need to wait certain time delay, thereby being capable of improving the whole performance of the second-layer network.

Cong Xue

Papers

Method and switch for multi-spanning tree case fast emigration