topic Netmasks for heartbeat ip addresses in Operating System - HP-UX

Netmasks for heartbeat ip addresses

Bruno Bossier_1 — Tue, 19 Jul 2005 05:49:56 GMT

Can you specify a specific netmask for a cluster heartbeat ip adress ? I want to use the following addresses :

172.30.40.210 and 211 with netmask 255.255.255.240 but that does not seem to work.

Does Serviceguard determine the netmask himself based on the ip address you specify ? This is for a heartbeat via a point-to-point connection using a cross-cable.

Bruno

Re: Netmasks for heartbeat ip addresses

melvyn burnard — Tue, 19 Jul 2005 05:55:59 GMT

As long as the ip address and netmask are valid, there should be no issue from SG side of things.
These get set in the netconf file. One item to check is that the broadcast address is correct.
What errors are you getting, and is it on both nodes ?

Re: Netmasks for heartbeat ip addresses

RAC_1 — Tue, 19 Jul 2005 06:00:29 GMT

Your ip address belongs to class C network, you can not have that netmask.

The default netmask for class c network is 255.255.255.0

Anil

Re: Netmasks for heartbeat ip addresses

Bruno Bossier_1 — Tue, 19 Jul 2005 06:14:54 GMT

Netconf is not the problem. I can configure the interfaces through SAM with the ip addresses and netmasks as specified. It's Serviceguard who is complaining :

cmcheckconf gives an error that the netmask is not correct for the ip address specified.

Bruno

Re: Netmasks for heartbeat ip addresses

melvyn burnard — Tue, 19 Jul 2005 06:43:16 GMT

Is this a new SG configuration? or is it an exisiting running cluster?

Re: Netmasks for heartbeat ip addresses

Bruno Bossier_1 — Tue, 19 Jul 2005 07:21:51 GMT

An existing cluster. The current ip addresses are :

192.168.1.1 (server 1) and 192.168.1.2 (server 2) with netmask 255.255.255.0. They are connected point-to-point through a cross-cable.

Bruno

Re: Netmasks for heartbeat ip addresses

melvyn burnard — Tue, 19 Jul 2005 07:23:30 GMT

Ah, are you trying to make these changes on line?
You should halt the cluster, make your chnages and then do cmapplyconf, to get the new netmask accepted.

Re: Netmasks for heartbeat ip addresses

Bruno Bossier_1 — Tue, 19 Jul 2005 07:32:51 GMT

Well, I tried to do this online, but our cluster crashed. OK, stupid from me to do. I will try again when the cluster is down.

Thanks for the hint ...

Cheers,
Bruno

Re: Netmasks for heartbeat ip addresses

Srinivas Krishnappa Sha — Thu, 21 Jul 2005 18:01:56 GMT

Any changes w.r.t the heart beat IP address or cluster nodes Need to be done offline after bringing down the cluster and later you need to check and verify for these changes and apply them and bring the cluster up.