topic Re: Changing IP address via command in Operating System - HP-UX

Changing IP address via command

???_185 — Mon, 20 Mar 2006 10:54:56 GMT

Hello everyone.
Last week, I changed IP addresses on a rp7405 server /w the following steps.

[original conf]
lan0: 10.10.10.10/24
lan1: 20.20.20.20/24

[target conf]
lan0: 20.20.20.20/24
lan1: 10.10.10.1024

[each steps that I did]
# ifconfig lan0 down
# ifconfig lan0 unplumb
# ifconfig lan1 down
# ifconfig lan1 unplumb
# ifconfig lan0 20.20.20.20 255.255.255.0 20.20.20.1
# ifconfig lan0 plumb
# ifconfig lan0 up
# ifconfig lan1 10.10.10.10 255.255.255.0 10.10.10.1
# ifconfig lan1 plumb
# ifconfig lan1 up

and after reconfiguration,
# netstat -in
# netstat -rn
showed correct information that I want.

All NIC's link status were OK.
but afterall cannot ping anywhere except NIC itself. ie. ping 10.10.10.10 on lan1...

I couldn't solve the problem, so I resolv it /w the help of SAM...

Did I miss the step?
Or are there any miss/wrong steps?

Thank you...

Re: Changing IP address via command

Robert-Jan Goossens_1 — Mon, 20 Mar 2006 11:16:03 GMT

Hi,

# ifconfig lan0 down
# ifconfig lan0 unplumb
# ifconfig lan1 down
# ifconfig lan1 unplumb
# ifconfig lan0 plumb
# ifconfig lan0 20.20.20.20 255.255.255.0 20.20.20.1 up
# ifconfig lan1 plumb
# ifconfig lan1 10.10.10.10 255.255.255.0 10.10.10.1 up

and change the /etc/rc.config.d/netconf file.

Regards,
Robert-Jan

Re: Changing IP address via command

John Dvorchak — Mon, 20 Mar 2006 12:03:08 GMT

Any time you can't ping off of your subnet it is a missing or incorrectly defined default router. Are you sure netstat -rn had correct router associated with the correct LAN number?

The step you were missing is the route delete and route add commands. To get the default routers to survive a reboot you would have had to change /etc/rc.config.d/netconf so the correct instance [0] pointed to the correct router.

Sam is a good way to change the addresses because it remembers everything. If you want to change the address from a command line take a look at man set_parms and that script will ask you all the right questions and modify all of the right files. i.e.

set_parms initial

One more thing did you remember to change the IP address in /etc/hosts to reflect any name/address change?

Re: Changing IP address via command

Steven E. Protter — Mon, 20 Mar 2006 12:39:19 GMT

Shalom,

I would conclude that the settings you input are not compatible with the target lan. Its possible you have the cables crossed. Try reversing them.

Also, you might want to run a quick hardware check on the two lan cards with cstm, mstm, or xstm

I doubt however that both of them are bad.

SEP

Re: Changing IP address via command

Nguyen Anh Tien — Mon, 20 Mar 2006 20:44:29 GMT

I think you should modify IP address in /etc/rc.config.d/netconf
then restart net service:
#/sbin/inet.d/net stop
#/sbin/inet.d/net start

Re: Changing IP address via command

Yogeeraj_1 — Mon, 20 Mar 2006 23:07:15 GMT

hi,

/etc/rc.config.d/netconf should be modified manually to as to retain the changes.

don't forget to backup the netconf file prior to any modifications.

kind regards
yogeeraj

Re: Changing IP address via command

???_185 — Thu, 23 Mar 2006 04:04:45 GMT

Gentleman Thank you for all the responses