10gig optic port goes down with remote fault, needs power down and up to get it back once a while

[Mary_Peng]

I have an extreme switch recently configured, the optical port is not working very good. The link state is always active for a while(couple of hours to couple of days), and then change to link state "ready" and never come back until I power the whole switch down and up.

Recent log, related to this issue is :
09/29/2015 22:05:50.48 Port 45 link down - remote fault 09/29/2015 22:05:50.47 Port 46 link down - remote fault
09/29/2015 07:02:32.41 Port 45 link UP at speed 10 Gbps and full-duplex
09/29/2015 07:02:32.40 Port 46 link UP at speed 10 Gbps and full-duplex
09/29/2015 07:02:27.37 Port 45 link down - Local fault
09/29/2015 07:02:27.36 Port 46 link down - Local fault

Seems like the local fault can be recovered by the switch itself, but if the remote fault occurs, the port won't come back. Does anybody know what the remote fault really means?

Switch Type: X670V-48t
EXOS version: 15.2.2.7

detailed transceiver information on the extreme switch side:
SFP or SFP+: SFP+
Signal: present
TX Fault: no
SFP/SFP+ Vendor: AVAGO
SFP/SFP+ Part Number: AFBR-709SMZ
SFP/SFP+ Serial Number: AD15163022E
SFP/SFP+ Manufacture Date: 150413
SFP/SFP+ Type: SFP
Connector: LC
Type: SR
Supported: no

Wavelength: 850
GBIC supports DDMI. MonitorType: 68

On the other end, we are connecting to EXFO QA-805 10 gig optic ports with transceivers supported by them.

Thanks!

[christopher_mad]

we have had this issue in the past with our 10g ports going down with remote fault and will not clear until reboot. We ended up putting in RMA for our devices and haven't had the issues since. I can tell you that putting in a different sfp on both sides of the same type seems to clear the remote fault issue. step 1. remove sfps. step 2. put in different sfp on both sides. step 3. reinsert original sfp in both sides. step 4. connect fibers back. this has worked for me in the past as a work around to get things back on the air for a short period of time.

[Mary_Peng]

Thanks David!

[davidj_cogliane]

FYI, The phone camera works great as long as the camera does not have a filter built in.

[Ryan_Mathews]

Good call out Christopher. Thanks for keeping an eye on the big picture here...literally.