[Lustre-discuss] lctl tcp routing

[Alexander Oltu]

Hi,

We have  a cluster with its internal Lustre filesystem with 10GbE
TCP/IP lnet. The IP range is in 172.16/16 subnet.

Now we want to mount an external Lustre filesystem on our compute
nodes. The external FS has an IP range in 192.168.200/24 subnet.

Switches from both are connected.

We fixed routing tables on both subnets by:
on 172.16 machines:
 route add -net 192.168.200.0/24 dev eth0
on 192.168.200 machines:
 route add -net 172.16.0.0/16 dev eth0

We can ping nodes each other from the both subnets. But lnet ping is not
working and as such we can't mount external Lustre filesystem.

I know that we can add virtual IPs on the compute nodes in 192.168.200
range and it will work, but maybe someone knows about solution with
routing tables and lctl routes?

Thanks,
Alex.