There are two types of shared OS/BMC NICs:
  1) Where the BMC and OS have separate MAC addresses (so separate IP 
addresses).  This is the most common.  
Or
  2) The BMC and OS share the same MAC address and the BMC gets only the IPMI 
traffic to the RMCP port.  

Compare the IPMI LAN MAC with your OS MAC from ifconfig to see which it is.
If case 2, the IP addresses must match or it will not work (arps will fail, 
etc.). 

Andy

-----Original Message-----
From: Carsten Aulbert [mailto:carsten.aulb...@aei.mpg.de] 
Sent: Tuesday, September 06, 2011 3:32 AM
To: ipmitool-devel@lists.sourceforge.net
Subject: [Ipmitool-devel] IPMI LAN interface stops working after upgrade 
toDebian squeeze...

Hi

we are using the old venerable PDSML-LN2+ Supermicro boards where the BMC is 
piggy-backed on top of eth0, thus no dedicated NIC for it.

We are finally preparing to upgrade from Debian Lenny to Debian Squeeze and 
encounter something very special. During installation we reconfigure the IPMI 
settings and everything seems ok, but upon the reboot into the freshly 
installed system, suddenly the IPMI LAN interface stops working. Something in 
the running system seems to disable this, as it usually (but not always) comes 
back alive with a reboot (and fails again during system start-up).

If I do a regular Debian lenny install everything is working as expected, even 
after a reboot.

I'm currently totally puzzled what could be the root cause. The kernel is 
exactly the same, only the userland has changed:

ipmitool versions: 1.8.9-2 vs. 1.8.11-2

ipmitool lan print/user list/channel ...

show only the differences expected (other user name for example).

locally ipmitool has no problems accessing the card, remotely neither lan nor 
lanplus interface works with Squeeze userland.

Anyone with an idea, what to test/how to home into this problem?

Cheers and thanks a lot in advance

Carsten

--
Dr. Carsten Aulbert - Max Planck Institute for Gravitational Physics 
Callinstrasse 38, 30167 Hannover, Germany
Phone/Fax: +49 511 762-17185 / -17193
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