changing subnet mask

[Fred Martin_1]

I need to change the subnet mask on my HP-UX 11.11 server. I've got users logged in and a database running.

The mask is being broadened, from 255.255.255.0, to 255.255.0.0, so I won't be choking anyone off as far as IP is concerned.

The thing I'm worried about is the live connections.

Can the mask be changed on the fly without, say, interrupting a live telnet session? Or should I be at single-user to do this?

[A. Clay Stephenson · Accepted solution]

It's nice to have a Sandbox to test this sort of stuff. I just did your equivalent ifconfig command remotely and I did not lose my telnet session that made the change itself or another that was echo'ing lines of text to the screen. Changing it back produced no problems either. If my Sandbox is any indication (and it is running 11.11 at the moment) then you should be okay in this particular case of going to a wider subnet mask. I assume this subnet will not interfere with other cards configured on this box.

[Fred Martin_1]

Only one NIC on the box. The DB on there is accessed entirely by telnet for local users and by Progress Webspeed for my web interface (if I have to restart that on the web server, no great loss).

Many thanks Clay. Doing it now sure beats waiting for a downtime window to work in.

[Fred Martin_1]

A related question: the web interface console has it's own IP address. Where is that configured. I assume it has it's own subnet mask setting, I'll need to change that as well.

[Elijah Cuellar]

On the web console look at this link http://docs.hp.com/en/A5191-96018/ch04s03.html about half way down.

[Fred Martin_1]

That was it: GSP> lc

Thanks to both you.