09-05-2012 04:20 AM
I have a couple of 620's I use for test
When I trunk vlans over the gigE interface, no problem
when I trunk vlans over the fastE interface, they never come up
I am pretty sure I have covered all config mistakes (never say never) - is this a hardware limit?
09-05-2012 04:29 AM
Did you try to remove the trunk from the GigE interface first? I believe only a single trunk is allowed on that device.
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09-05-2012 07:14 AM
OK got to the bottom of it - i think
with the two controllers connected one of the links goes into a discarding state in spanning tree with brings the layer 3 interface down asociated with that trunk, as the vlan is no longer in forwarding state
not sure I am "brave" enough to disable spanning tree when connecting trunk links to multiple switches with multiple trunks so I didn't bother in the end
the trunk did work on the FE interface though - cheers for the tip (yet again) CJ