Sorry if this is a dumb question but I'm new to the Nexus line of products. My issue is that I cannot get a 1 gig fiber link to a 3560 or 3750 to show up as connected after I upgraded my Nexus 3064 to the n3000-uk184.108.40.206.U2.2c NXOS. The 1 gig interfaces worked fine before I did the upgrade, and if I roll back to n3000-uk220.127.116.11.U1.1a they work fine. My 10 gig interfaces work fine. I'm stumped. If I hook up a link runner to the Nexus the interface comes up as connected but if I link it to a 3750 or 3560 I have no luck. I have done all the layer one stuff like verifiy SFP and fiber. And again if I roll back to the old NXOS it works fine.
I've been searching the forum for days and haven't found out anything. Here are a few commands to help out:
switchport mode trunk
switchport trunk native vlan 555
TEST-NEXUS(config-if)# show int Eth 1/3 transceiver details
transceiver is present
type is 1000base-SX
name is CISCO-FINISAR
part number is FTLF8519P2BCL-C4
revision is A
serial number is FNS143203RL
nominal bitrate is 1300 MBit/sec
Link length supported for 50/125um fiber is 550 m
Link length supported for 62.5/125um fiber is 270 m
I still have an open TAC for this but I have gotten it working on the latest NXOS. You need to disable autonegotate on the far side 3560/3750 switches. On the 3750 it's no auto and on the 3560s I think its "switch nonnegotiate".
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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