IB Switch „cable Is Present On Port ‚N‘ But It Is Polling For Peer Port“

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It is seldom but from time to time you have ports on the IB Switches which are not used

Also it could be possible that your monitoring here Cloud Control 12c came up with a message

„cable Is Present On Port ‚N‘ But It Is Polling For Peer Port“ this is a known bug 15937297 in 12.1.0.3

So to fix this you have two possibilities:

  • remove the monitoring of the alert within Cloud Control 12c 
  • the unused connector on the IB switch ports can be safely disabled on the IB switch

I use the second way by using the „disableswitchport [–reason=reason] connector | ibdev port“ command

So here are the steps

  • In my example I would like to disable Port 5, 6, 7
  • ssh  sexa11-ib01
  • listlinkup
  • check the status of ports
  • disableswitchport

Here my example


[root@sexa11-ib01 ~]# listlinkup

...

Connector 13A Present <-> Switch Port 09 is up (Enabled)
Connector 14A Present <-> Switch Port 07 is down (Enabled)
Connector 15A Present <-> Switch Port 05 is down (Enabled)
Connector 16A Present <-> Switch Port 03 is up (Enabled)
Connector 17A Present <-> Switch Port 01 is up (Enabled)
Connector 9B Present <-> Switch Port 13 is up (Enabled)
Connector 10B Present <-> Switch Port 15 is up (Enabled)
Connector 11B Present <-> Switch Port 17 is up (Enabled)
Connector 12B Present <-> Switch Port 12 is up (Enabled)
Connector 13B Present <-> Switch Port 10 is up (Enabled)
Connector 14B Present <-> Switch Port 08 is up (Enabled)
Connector 15B Present <-> Switch Port 06 is down (Enabled)
Connector 16B Present <-> Switch Port 04 is up (Enabled)

Here the disable for Port 6

[root@sexa11-ib01 ~]# disableswitchport --reason=Blacklist 15B
Disable connector 15B Switch port 6 reason: Blacklist
Adminstate:......................Disabled (Blacklist)
LinkWidthEnabled:................1X or 4X
LinkWidthSupported:..............1X or 4X
LinkWidthActive:.................4X
LinkSpeedSupported:..............2.5 Gbps or 5.0 Gbps or 10.0 Gbps
LinkState:.......................Down
PhysLinkState:...................Disabled
LinkSpeedActive:.................2.5 Gbps
LinkSpeedEnabled:................2.5 Gbps or 5.0 Gbps or 10.0 Gbps
NeighborMTU:.....................4096
OperVLs:.........................VL0-7

After the disable

[root@sexa11-ib01 ~]# listlinkup
Connector 14A Present <-> Switch Port 07 is down (Blacklist)
Connector 15A Present <-> Switch Port 05 is down (Blacklist)
Connector 15B Present <-> Switch Port 06 is down (Blacklist)

If you need the ports back you enable it via enableswitchport

 

 

 

 

 

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