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

gigiz
Valued Contributor

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

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.
8 REPLIES
gigiz
Valued Contributor

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

many point at all
Kenan Erdey
Honored Contributor

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

hi,

what are hp-ux versions ?
Computers have lots of memory but no imagination
gigiz
Valued Contributor

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

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
Honored Contributor

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

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
WISH? IMPROVEMENT!
gigiz
Valued Contributor

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

Nslookup isn't problem
Torsten.
Acclaimed Contributor

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

Make sure both IPs are in different subnets.

Hope this helps!
Regards
Torsten.

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Kenan Erdey
Honored Contributor

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

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.
Computers have lots of memory but no imagination
Fabio Ettore
Honored Contributor

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

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
WISH? IMPROVEMENT!