Lustre discuss - Jul 2008 - multihomed server and syntax for modprobe.conf

Hi,

I want to set up a small Lustre test environment Lustre with one MDS/MGS and one
OSS. Clients should be able to connect though Infiniband and Gigabit.

The setup for Infiniband is easy, then I tried to configure both transport
methods in /etc/modprobe.conf:

options lnet networks=o2ib(ib1),tcp(eth2)

I also ran tunefs.lustre on the OSS node to tell the OSS the new NID of the MGS:

# tunefs.lustre --eraseparams --mgsnode=192.168.2.27 at o2ib,10.0.0.27 at tcp
/dev/md11

If I try to mount the Lustre filesystem on an Gigabit-only client ("options
lnet networks=tcp(eth1)"), I get an error message, that the client can not
resolve the Infiniband-NID of the OSS ("192.168.2.28 at o2ib").

What is the correct syntax for modprobe.conf? 

- Quotes or no quotes? 
- with number or without (o2ib0 or o2ib)?
- Better use ip2nets? 

Or did I make a mistake elsewhere? 

kind regards
  Meik

On Tue, 2008-07-15 at 14:42 +0200, Meik Langwald wrote:
> Hi,
> 
> I want to set up a small Lustre test environment Lustre with one MDS/MGS
and one OSS. Clients should be able to connect though Infiniband and Gigabit.
> 
> The setup for Infiniband is easy, then I tried to configure both transport
methods in /etc/modprobe.conf:
> 
> options lnet networks=o2ib(ib1),tcp(eth2)
> 
> I also ran tunefs.lustre on the OSS node to tell the OSS the new NID of the
MGS:
> 
> # tunefs.lustre --eraseparams --mgsnode=192.168.2.27 at o2ib,10.0.0.27 at
tcp /dev/md11
This won''t do it.  You need to follow the procedure for changing a
server NID in section 4.2.3.3 of the current Operations Manual.

b.

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