topic Re: Two LAN card with same IP? in Operating System - HP-UX

Two LAN card with same IP?

Domenico Viggiani — Wed, 10 Dec 2003 10:47:07 GMT

Hi,
I'd like to configure two LAN card in my HP-UX 11.00 machine with same IP address, obviously mantaining only one physically connected.
If I use 'ifconfig', I get "IP address already in use". Can I do something?

Mimmus

Re: Two LAN card with same IP?

Steven E. Protter — Wed, 10 Dec 2003 10:50:36 GMT

Yes.

If you spend around $1,500 to buy APA,Auto Port Agregation.

If not, no, you can not have two NIC cards with HPUX on the same network.

if the ip is 192.168.0.10 and the netmask is 255.255.255.0 the network is 192.168.0

SEP

Re: Two LAN card with same IP?

Massimo Bianchi — Wed, 10 Dec 2003 10:51:12 GMT

Simply: NO.

What you can do:

- buy and use APA (auto port aggregation) if you want fault resiliance and faster network

this aggregates the two lan card as one virtual nic, and assign the IP to that virtual nic

- buy and use MC/SG, if you want fault resiliance

this uses an unconfigured nic as a failover in case of problem to the primary nic. only one nic is active at one time

- write a script that does a check (with linkloop) and switches between the nic, if the connection is not avaiable

Massimo

Re: Two LAN card with same IP?

Sanjay_6 — Wed, 10 Dec 2003 12:43:29 GMT

Hi,

You cannot have two cards on the same system with the same ip unless you go for APA. Hp doesn't recommend multiple addresses on the same system with the same ip / subnet.

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000070742361

The doc id is UTRANKBRC00011759

Hope this helps.

Regds