How to make server responds with virtual IP instead of physical IP

[gigiz]

We have a server that (server1) needs to access the NFS App server.

It appears that the client (server1) starts communicating with the virtual IP on the NFS App server, but for some reason, the App server is changing to its interface IP during the conversation for some of the UDP connections. The firewall will not allow this as it thinks that the connection has been hijacked by a different servers.

[gigiz]

many point at all

[Kenan Erdey]

hi,

what are hp-ux versions ?

[gigiz]

Server nfs hpux 11.0 and the client hpux 11.23.
If from my client use physical ip work
If from my client i use Virtual ip not work.

[Fabio Ettore]

Ciao,

I'm not sure to have understood well the problem, I understand the problem is the following:

on NFS client when mounting filesystem/s from NFS server it's using the physical IP address instead of virtual IP which should be the expected behaviour. And I guess you're using the name to mount.

If my statement is correct, I think the point is about the resolution. Try nslookup on both physical and virtual IPs, which name are you using to mount NFS filesystem/s?

Ciao,
Fabio

[gigiz]

Nslookup isn't problem

[Torsten.]

Make sure both IPs are in different subnets.

[Kenan Erdey]

Hi,

have a look at this:

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1174680

you may try adding NFS_TCP=1 and restart nfs.server daemon and run

ndd -set /dev/ip ip_strong_es_model 2

not tested, but hope it helps.

[Fabio Ettore]

Hi,
just to clear my previous post.

When I suggested checking IP addresses by nslookup was not because I think the problem is about nslookup or IP addresses are not correctly configured.

I'll reformulate my question: on NFS client which name are you using to mount NFS filesystem/s?

Best regards,
Fabio