IPMI on localhost

[Kilian CAVALOTTI]

On Wednesday 21 March 2007 09:44:55 am Jesús M. Navarro wrote:
> Hi, Kilian:
>
> El Miércoles, 21 de Marzo de 2007 17:32, Kilian CAVALOTTI escribió:
> > Hi all,
> >
> > I have a couple PE1950 for which I configured BMCs for IPMI access.
> > Everything works perfectly when I try to access hostA's BMC from
> > hostB. But I cannot access hostA's BMC from hostA itself.
>
> That's true, you can't access BMCs from itself using the LAN protocol. 
> Just try to connect without -l option.

Indeed, it works, thank you.

But I'm very curious to know why the LAN protocol doesn't work in this 
case. Since the BMC and the OS's network interface have two different MAC 
addresses, they should be considered by the switch as two different 
network devices, right? 

So an IPMI request issued from the OS network interface (macA) to the BMC 
(macB) should be sent to the switch, which knows that macA and macB are on 
the same port (I checked that), so it should forward the IPMI packets back 
to the the same port they're coming from, where the BMC should catch them, 
since they're bound for macB, shouldn't it?

I'm probably missing something, but I don't see what.

Regards,
-- 
Kilian