8600/5500 trunk link - No layer 1

[faigy90]

Hi,

Has anyone come across this issue before, I have seen it twice now:

Log message from 8600:
CPU5 [03/16/14 00:31:30] COP-SW INFO Slot 3: Port 3 received Remote Fault from link partner.  Link going down.

I have tried several new GBICs and have moved the link onto a different 5500 switch, still layer 1 will not come back up!  I am getting the fibre tested tomorrow, but cant see it being that.

Any ideas?

Thanks,
Craig

[Dominik]

If I remeber it correct this massage comes from the Remote Fibre Fault Detection Feature.

You can try to disable autoneg and check if the link comes up with a fixed port speed.
Most times when Remote fibre fault detection shuts down a port you have a problem with fibre cable.

Good Luck

[faigy90]

Hi thanks for the reply.

The ports are 10gb and are fixed already.

I've not heard of remote fibre fault indication on 10gb links?  My colleague said he has heard of that feature of 1gb links?  We do not have VLACP enabled.

[Dominik]

Year that is correct remote fibre fault detection is a feature for 1GB ports.
Not sure if the same mechnism is also active at 10Gig ports.

I had some issues with 10Gig connections in fact they have higher requirement at the fibre optic cables than the 1 Gig connection. The SR 10 Gigabit goes max. over 300m cable depending on the damping of the connection.