Cisco 3550 PoE Switch – Uplink won’t come up?

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  • QuattroDave

    Afternoon all,

    Came across an odd one this afternoon, a client has a 3550 PoE switch running all they’re VOIP phones, the phones connect to the switch fine but the uplink port won’t connect to another switch or router the port stays down and won’t connect. I changed the router as the original was really flaky and cannot get the PoE switch to uplink to the new router… it was originally using port 1 on the PoE switch but I tried an few other all with the same result.

    I would guess that the ports have a specific config on them but am unsure what to look for, any ideas?

    Oh, please go easy on me, its not often I configure Cisco equipment…



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