TCPIP glitch wih aliases
- From: JF Mezei <jfmezei.spamnot@xxxxxxxxxxxxx>
- Date: Tue, 22 May 2007 16:40:37 -0400
I needed to move the cluster alias IP from an alpha to a vax.
I looked at the ifconfig command and issued
ifconfig we0 10.0.0.50 down
where the 10.0.0.50 is the cluster alias IP.
The VAX instantly picked up responsability for 10.0.0.50. But the alpha found its IP stack rather unresponsive.
Turns out the above command disabled all IPs on the WE0 interface, AND zapped the permanent routes from the active database. (why is that ?)
doing IFCONFIG WE0 10.0.0.11 up seemed to work, but it did not restor the routes so that node had no way to reach IPs outside its subnet.
Questions:
I seem to recall a magical TCPIP> incantation which would copy the permanent routes back into the active routes. Could not find it. Does anyone know if there is such a command ?
Also, is there a way to just disable the alias entry so it jumps to another node ? Or must one delete it and recreate it from scratch ?
(I think what I should have done yesterday was:
$ ifconfig WE0 -alias 10.0.0.50
$ ifconfig we0 alias 10.0.0.50 netmask 255.255.0.0
But this requires I know the exact parameters to feed to recreate that interface.
I would rather have those parameters stored in one single place as extra commands to execure during TCPIP startup and not have to worry about recreating them whenever I wish to move the alias to another node.
this si why I though the "down" command would be neat since I expected it to just disable the alias without deleteing it, but it ended up zapping it and disabling the primary interface.
.
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