Friday, July 12, 2019

Fiber link not coming up.

I have a fiber p2p link that is not even showing the ports coming up, let alone the connection. What I find odd about it is that I am getting transmit and receive data on it from the transceivers. Would this possibly be an optic issue or am I just missing something completely? Do both sides show physical down if there is an issue with one? I was expecting TenGigabitEthernet2/0/1 is up, line protocol is down or something as I have tried multiple optics on this side. Just want to check options before I drive to the other side of town and change out an optic.

Switch 1 TenGigabitEthernet2/0/1 is down, line protocol is down (notconnect) interface TenGigabitEthernet2/0/1 no switchport ip address 192.168.105.1 255.255.255.252 end Port Power High A High W Low W Low A Transmit Te2/0/1 -6.2 -1.5 -3.0 -9.0 -10.5 Receive Te2/0/1 -21.2 1.0 -1.0 -26.0 -27.9 Switch 2 GigabitEthernet1/0/12 is down, line protocol is down (notconnect) interface GigabitEthernet1/0/12 no switchport ip address 192.168.105.2 255.255.255.252 end Port Power High A High W Low W Low A Transmit Gi1/0/12 -6.0 -1.5 -3.0 -9.0 -10.5 Receive Gi1/0/12 -22.7 -3.0 -5.0 -24.0 -26.0 

Edit: TenGig2/0/1 is a 1/10g port with a 1g optic in it. The esteemed fruit-loop /u/asdlkf 's suggestion of forcing the speed fixed the issue. Speed Nonegotiate on each side brought up each line and then they synced.



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