Hi Nick,
    Maybe port 43 is the port that connects to the xCAT management node?


Ling Gao
Poughkeepsie Unix Development Lab
IBM Systems and Technology Group
Internal: T/L 293-5692 
External: [email protected], 845-433-5692

"I never worry about the future. It comes soon enough." --- Albert 
Einstein 



From:   Nick Evans <[email protected]>
To:     [email protected]
Date:   09/07/2015 05:34 AM
Subject:        [xcat-user] Discovery question



Hi xcatters,

I am currently working with switch discovery of compute nodes connected to 
a Cisco 3750 switch.

I had originally only configured the ports on the switch that actually had 
something plugged into them and then tried to do a discovery. The attached 
file is the configuration of the ports that i started with

Watching the messages log i found the following message
Sep  7 18:31:58 mgt xcat[80098]: Error communicating with 
ms-h25-mgtobm-1g-40: Unable to get MAC entries via either BRIDGE or 
Q-BRIDE MIB


After 3 days of frustration and going round and round in circles i found 
that if i set 
    switchport access vlan 415
on port 1/0/43 all of a sudden the discovery starts working.

I have no idea why and can't explain this. If anyone could shed some light 
on what is special about port 43 or the configuration of it i would be 
most appreciative.

Thanks for your help in advance
Nick Evans[attachment "switch.txt" deleted by Ling Gao/Poughkeepsie/IBM] 
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