For some reason it seems 6 ports on my first card in my brocade 8510 cannot negotiate to 16Gb (when locked at 16Gb they go to 8Gb).
ports are 1/12 1/13 1/28 1/29 1/30 1/31
Any idea what could be causing this, and how I can resolve the issue?
did you check the SFP inserted on affected Port ? are sure you have 16G SFP ?
yes. all are 4/8/16Gb capable.
This is one of 4 8510s that we have. The others are all showing the ports negotiating to 16Gb
add. you shold verify that the speed port is not set as -m N where N is the speed
you can do this with command "portcfgspeed"
"portcfgdefault" set all value to factory default.
That is what I have tried.
when I do portcfgspeed 1/29 16 it locks the port to 8G not the 16G as on the other ports I have locked.
Will attach pdf og the sfp for port 1/29
try please follow:
can you please post output from "sfpshow" command ?
No change. See attached
is only this port affected ? if yes, did you try to replace this SFP ?
I've never see such behavior, and if the issue is not related to defective SFP and the problem persist , I would suggest to open a case with Brocade.
There are 6 ports affected. I have moves SFPs and the problem stays with the port (SFP is fine on another port).
I have opened a support case with EMC ( our reseller for this switch)
Thanks for the help
I found this defect, the issue is related to 8gb SFP, but is probable you have a similar issue Loss of Signal.
Loss of Signal can be caused in example by wrong cable type, 16G need at least OM3 cable
Defect ID : DEFECT000552552Technical Severity : 2- High Product : Brocade Fabric OS First Affected Release : FOS7.2.1 Closed in Release(s) : FOS7.2.1f(Fixed), FOS7.3.1c(Fixed), FOS7.3.2(Fixed), FOS7.4.1(Fixed), FOS8.0.0(Fixed) Probability : Medium Technology Group : Traffic Management Technology : Port Bring-up Symptom : Speed will show higher (in switchshow) than actual SFP speed. For instance, 8G SFP will negotiate to 16G speed though SFP is not capable of 16G speed. Conditions : This occurs when remote 16G capable port generates Loss of Signal (light cut-off and on) by cable plug-out/in after switch performed HA-failover. Workaround : Use 16G SFP on 16G port blade. Recovery : Use CLI portdisable/porteanble to recover the affected port. But the problem can reoccur if there is a subsequent hafailover on the switch and the remote 16G port cuts light again.
Nothing is plugged in currently.
I tried to link ISL from another 16Gb switch last night.
Ended up having to use other ports that would allow 16Gb connections.
Changed out the SFP...The issue remained with the port, SFP negotiated fine on another port.
We have 4 of these 8510 switches and only 6 ports on this one card are impacted.
I am going to try a hafailover on EMC recommendation. Any risk in this?
hafailover is non-distruptive.
I think you issue is releted to a similar issue as the DEFECT, for this reason you shold insist to open a Ticket escalation to Brocade Support.
Done. Thanks (requested escalation to Brocade)
Just did the hafailover....and surprise...I can now lock the ports to 16G.