7520 switch running vsp fails to connect to BT NTE

[ShaunM]

We have been running a migration successfully until we hit a snag recently.

I have a 7520 switch running VOSS 9.4.1 with a 1gig SX SFP installed.  We move a working BT NTE connection at 1gig from the Cisco to the Extreme (same SFP type and same cable) and the Extreme switch brings the interface up/up, however the NTE is orange indicating an error on its side.

We have tried the obvious, change polarity on cable, using nonegotiate etc, but to no effect.

The show pluggable-opticalmodules detail  indicates a good RX/TX signal level and doesn't show any thing out of the ordinary.

Has anybody else faced a similar issue?  And if so, what was the fix?

[Aanon_Aanonsen]

Hello,

Set speed and duplex manually on the Cisco switch.  (You will probably see that the speed on the Cisco is 2.5 gig when you have auto-negotiation)

[rodney23koy]

Hello,

When an interface shows up/up locally on a VOSS switch yet the provider's Network Termination Equipment (NTE) indicates an error (orange/fault light), the physical layer (laser/fiber) is usually working, but a layer-1/framing or auto-negotiation mismatch is occurring between the Extreme SFP and the NTE transceiver.


Best Regards