Port initialization control method and fiber channel over Ethernet switch

Abstract

The invention discloses a port initialization control method and a fiber channel over Ethernet (FCoE) switch. In the invention, when a fiber channel (FC) port under a negotiation status of an exchange link parameter (ELP) receives an ELP rejection message in which an opposite terminal shows no support to an ELP function in the case not receiving a fiber channel logging (FLOGI) message, the state of the FC port can be switched into an isolated state, thus avoiding meaningless repeated initialization and oscillation of the FC port. In addition, when the FC port under a link synchronous state fails in synchronization, firstly the current synchronous state of the FC port can be maintained and then the synchronization is retried, if failure times for retrying reach the scheduled maximum retrying times, the state of the FC port is switched into the isolated state, thus reducing the waiting time for re-executing link synchronization and avoiding oscillation of the FC port.

Description

technical field [0001] The present invention relates to an initialization control technology, in particular to a port initialization control method and an FCoE switch (FCoE Forwarders, FCF) in a fiber channel over Ethernet (FCoE) system. Background technique [0002] In order to realize the integration of storage area network (Storage Area Networks, SAN) and local area network (LAN), the prior art proposes an FCoE system, in which FCoE system, FCF can be connected with Ethernet node (ENode), It is connected to other FCFs, common transit (Transit) switches, and network elements with other functions. Among them, the FCF has an Ethernet port and a fiber optic (FC) port. When the FC port of the FCF is connected to different network elements, the FC port should be configured in a corresponding mode according to the FC port mode of its peer network element. [0003] The port initialization described in this document is for the FC port of the FCF, and the initialization for the FC...

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Problems solved by technology

[0013] Furthermore, since the port initialization is re-initiated from state P0 each time, the waiting time of state P11 needs to pass, and the time required for re-judging the peer mode and performing various initialization and negotiation processes in states P0-P5 also makes the re-execution of state P6 Link synchronization needs to wait for too long, increasing unnecessary resource consumption

[0014] For the situation where the synchronization fails in state P6, since the link synchronization must be performed when the peer end is in E-port mode, it is completely unnecessary to re-initiate port initialization and re-ELP negotiation from state P0, and after the state P11 The waiting time, as well as the time required for re-judging the peer mode in states P0~P5, and performing various initializations and negotiation processes, also make the re-execution of link synchronization in state P6 take too long to wait, increasing unnecessary resource consumption

[0015] Moreover, if the link synchronization in state P6 fails every time, the port initialization will be re-initiated repeatedly from state P0, which will cause the local FC port to oscillate.

[0016] It can be seen that the existing port initialization control method is easy to cause FC port oscillation, and the waiting time for restarting link synchronization is too long, which increases unnecessary resource consumption

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