I don't think fiber negotiates. It isn't usually capable of anything but gig-full. Are you sure the carrier is using 1g fiber. Carriers are always provisioning 100m smf interfaces for low-cap connections if you don't tell them otherwise. I had a few customers get bitten by this.
Sent from my iPhone On Apr 15, 2011, at 2:07 PM, Gert Doering <[email protected]> wrote: > Hi, > > yesterday, one of our customers tried to move two GigE-on-fiber circuits > from a Catalyst 4507 to a new Nexus 5548. > > The other end terminates on some carrier gear (and is then multiplexed > in whatever ways across the city). > > After moving the circuit, the link didn't come up on the Nexus, but > the carrier gear *did* show link. I wasn't on-site, so I couldn't > investigate myself, but it smells very much like "GigE link negotiation > being disabled on the carrier gear" - carriers love that. > > Of course we do not have access to either the Catalyst nor the Nexus, > but it's "our duty" to "make it work" (after all, we provide the fiber > patches!). So I'd like him to test disabling link negotiation on the > Nexus, but don't know how to do that - no access to any NX-OS gear yet. > > On CatOS, this is "set port negotiation x/y disable". > > On IOS, it's "int giga x/y / speed nonegotiate". > > --> How to do it on NX-OS? > > http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli_rel_4_0_1a/BasicEthernet.html > > refers to "Layer 1 autonegotiation", but no word on turning it off... > > gert > -- > USENET is *not* the non-clickable part of WWW! > //www.muc.de/~gert/ > Gert Doering - Munich, Germany [email protected] > fax: +49-89-35655025 [email protected] > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
