Brocade 8510 fos 7.3.1d trying to lock port to 16Gb stays at 8Gb. have checked and SFP 4/8/16

[Roland Dyck]

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?

Brocade 8510.pdf ‏59 KB

[Antonio Bongiorno T…]

did you check the SFP inserted on affected Port ? are sure you have 16G SFP ?

[Roland Dyck]

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

[Antonio Bongiorno T…]

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.

[Roland Dyck]

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

sfp.pdf ‏5 KB

[Antonio Bongiorno T…]

try please follow:

portcfgpersistentdisable port_number

portcfgdefault port_number

portcfgpersistentenable portnumber

can you please post output from "sfpshow" command ?

[Roland Dyck]

No change.  See attached

sw8201a.pdf ‏13 KB

[Antonio Bongiorno T…]

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.

[Roland Dyck]

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

[Antonio Bongiorno T…]

Roland,

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 :     DEFECT000552552

Technical 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.