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Webcast-Catalyst9k
New Member

Problem configuring a trunk between two 3550-12G's

I have a problem configuring a trunk between two 3550-12G's.

>

> I have the following config oon both switches:-

> interface GigabitEthernet 0/1

> switchport trunk encapsulation isl

>

> They are then connected with two cables to each others X3500XL GBIC cards.

>

> CMS shows the trunk operating at 100mb/s

> show interface status shows

> Gi0/1 connected trunk a-half a-1000 1000BaseCX Gigastack

>

> Should the trunk be running at full duplex?

> Why is CMS not showing the trunk as 1000mb/s?

Why is on light in the GBIC amber?

1 REPLY
New Member

Re: Problem configuring a trunk between two 3550-12G's

Just make sure you manually configure both ends as 1000 full duplex. The a-half a- 1000 indicates the port is autonegotiating the speed and duplex. I am not sure, but amber usually means the port is in a error disabled state.

Sean W

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