Lucent GBE (4 x VC4) clues needed

Saku Ytti saku+nanog at
Thu Sep 21 18:00:14 UTC 2006

On (2006-09-21 18:49 +0100), Sam Stickland wrote:
> Did you try power cycling the Lucents after changing the auto-neg 
> settings? I've seen some broken autoneg implementations in the past on 
> managed media converters that didn't change settings immediately. It's 
> worth a shot as you seem to be all out of other ideas ;)

I brought the adjacent ports in IP gear down and up. We could verify
from management interface to the lucent that autonegotiation wasn't 
performed after down/up, while we could observe before down/up that
autonegotiation was marked being done even though we had configure
cisoc interfaces as 'force-up'. So clearly it needed to see link 
We didn't powercycle lucent, as it would mean bringing down tens
of 10G waves. But taking the GBE module out/in would have been
option (three countries are involved, so bit inconvenient, but
possible). Country A - Country B is one lucent leg.
Country B - Country C is another lucent leg.

Anyhow thanks for the thoughts, any help I can get is much
appreciated :). Of course we have full support agreement
to both vendors, which we probably have to try sooner 
or later, but it'll be long battle on who's problem it
really is.


More information about the NANOG mailing list