Anything showing up in the Cisco log? I'm not sure about the 5548, but on the 5010/5020s, only certain ports will do both 1 gig and 10 gig. Not sure if a non-1 gig capable port would accept the speed 1000 command. Those symptoms sound like the speed 1000 is actually missing. Do the SPFs on each side have matching wavelength?
Thanks, Chuck -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, September 21, 2011 5:28 PM To: [email protected]; [email protected] Subject: Re: [c-nsp] Funny problem w/ SFP link on Nexus 5548 Is Gig-E auto negotiation set the same on both devices? It sounds kind of like the Nortel has Gig-E auto negotiation disabled, so it will show link as soon as it sees light. Your NX might be trying to auto negotiate which won't work if the other side isn't doing it as well. Maybe try disabling auto neg on the NX. -Vinny -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Garry Sent: Wednesday, September 21, 2011 3:43 PM To: [email protected] Subject: [c-nsp] Funny problem w/ SFP link on Nexus 5548 Hi, I'm currently at a customer who got a 5548 with 2248 FEX and several 2960S connected to the 5548, everything working fine. Anyway, in order to migrate from the old switch infrastructure, we tried to interconnect them to the 5548, which is where my problem started - the link just won't go up on the NX ... The other side is a Nortel core switch, with 8616SXE card for fiber links. On the Nortel, the link light goes on when I connect the switches, but the Nexus doesn't do anything. SFPs are the same as for the links to the 2960S, OEM/compatible 1G optics. Ports are configured for 1G ("speed 1000"), same as for the 2960S. When I put the same SFP in a 2960S, the link comes up at once. What am I missing here? Thanks, Garry _______________________________________________ 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/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
