On Mon, Oct 26, 2009 at 11:34 AM, Bogdan Costescu <bcoste...@gmail.com> wrote: > On Mon, Oct 26, 2009 at 4:50 PM, Rahul Nabar <rpna...@gmail.com> wrote:
> The BMC is a CPU running some firmware. It's a low power one though, > as it doesn't usually have to do too many things and it should not > consume significant power while the main system is off. Some BMCs even > run a ssh or http daemon to allow an easier interaction. To me the additional services seem one of the root causes of problems. Complexity just means more places for stuff to go wrong at. It may not be super difficult to impliment ARP and IPMI but when you start adding ssh and http you are pretty much writing some pretty complex daemons I suppose. On the original Opteron sun servers which had BMCs and the two Ethernet interfaces which you could daisy-chain, the BMCs were Motorola single board computers running Linux. So ssh and http access were already there with whichever Linux distro they ran (you could look around in /proc for instance) http access was dead useful - I remember using it, and also on the silver coloured xNNNN series which followed them. As I recall, it was a nice interface to list the hardware error logs. Regarding how IPMI and eth0 co-exist on one interface, I though there was a simple bridge chip on the motherboard. The contents of this email are confidential and for the exclusive use of the intended recipient. If you receive this email in error you should not copy it, retransmit it, use it or disclose its contents but should return it to the sender immediately and delete your copy. _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
