Subnet mask change in 11.20 2 node cluster (646 Views)
Occasional Contributor
Posts: 5
Registered: ‎07-10-2012
Message 1 of 3 (646 Views)

Subnet mask change in 11.20 2 node cluster

[ Edited ]

Hi ,


We have a 2 node 11.20 ServiceGuard Cluster


I am about to change only the subnet mask of one of the configured network .


(The subnet will remain the same only the mask changes.)


I am not sure whether I need to halt the cluster in 11.20 . If halt is needed then do I need to reapply the Cluster configuration . Because no where in the cluster and package configurtion I can see that subnet mask has been mentioned.




P.S. This trhead has been moevd from HP-UX > General HP-UX > Serviceguard. - Hp forum Moderator



Honored Contributor
Posts: 13,910
Registered: ‎06-21-2000
Message 2 of 3 (613 Views)

Re: Subnet mask change in 11.20 2 node cluster

I would recommend shutting down the cluster.  Changing the subnet mask will require networking to be stopped and restarted, which would affect your cluster.


In a test cluster I have, the package control script does mention the subnet mask.  In our definition:





Honored Contributor
Posts: 1,214
Registered: ‎09-19-2000
Message 3 of 3 (588 Views)

Re: Subnet mask change in 11.20 2 node cluster

Serviceguard A.11.20 knows the netmask of the NICs identified in the cluster binary file.


# cmviewcl -v -f line | grep netmask


In order for Serviceguard to update the cluster binary file with the new netmask, you must comment the _IP reference from the cluster ASCII configuration file, cmapplyconf the update (online ok), then re-add the IP.  Note that Serviceguard will reject this if the indicated IP is the sole Heartbeat_IP.   


Also note that /etc/rc.config.d/netconf must be updated and actions of the NIC should be quiesced during the transistion.

The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation.