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!

[Mary_Peng]

Thank you! I will check it via a camera later.

[christopher_mad]

Please never....ever....look at the laser. if you are looking into any laser you can damage your eye. Please review your fiber safety documentation. You should never be able to see a laser with your bare eye,

[Mary_Peng]

Hi Chris,

I just tried your method, but it seems not working. I only got four transceivers, so I swaped them, connected the fiber and put them back.

What I noticed is that, on the remote side, if I plug in the transceiver and no fiber connected, I could see a beam of laser coming out from that trasceiver port. However, when the 10 gig port on the switch goes down, no matter what optic transceiver I plug in locally, there is no laser coming out until a reboot.

Thanks for your suggest. I'm contacting with the support team from extremes now.

-Mary

[Alexandr_P]

Hi!

Also you can try to increase the value of debounce timer on ports 45-46.

Do you use ports 47-48 as alternate stack-ports? (when use, ports 45-46 should not be used as data ports - it belongs to X670, but was an issue with X670V too).

Thank you!

[Mary_Peng]

I did a show stacking-support and find the following:
Stack Available PortsPort Native Alternate Configured Current
----- ----------------- ---------- ----------
1 No 47 Native N/A
2 No 48 Native N/A
stacking-support: Disabled N/A

Flags: * - Current stack port selection

Does that mean I'm using port 47 and 48 as alternate ports?