VLans not working over fibre link

Unanswered Question
Jan 12th, 2010
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I've got a UC520 connected to an ESW540, which is then connected to another ESW540 in another building by a fibre link. The fibre link is run through two 3Com Surestack switches (old), while we wait for new fibre cables to link the ESWs directly.

Using CCA I can see the remote ESW and configure it. Client PCs are conected and working fine, but IP phones (SPA525G and SPA504G) do not pick up an IP address. I am assuming that something is causing a problem with the VLans on the way over.

Is there anything I can do to prevent this? I don't mind a less than ideal solution as it should only be temporary.



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Marcos Hernandez Tue, 01/12/2010 - 07:52
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IP Phones on our system must be on VLAN 100. So make sure that that VLAN is propagated across the layer 2 hops connecting both ESW switches.



apedder123 Thu, 01/14/2010 - 13:25
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Fine, I think the VLans were getting stripped.

Got a new transciever today - link between ESWs works without a problem.




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