juan_baptiste_4
Mar 16, 2009Nimbostratus
force a refresh arp caches
Hi,
Is there a way to force a refresh the arp caches of devices to which an LTM is connected ? until now the only way I know is to reboot the LTM.
For example, I was configuring today one of our LTM (ID 1) boxes that was missing a pool and a virtual server of the LTM (ID 2) where we were doing some tests (they're not in H.A. for now until we finish some tests). Both LTM's are connected to the same network, so I created the pool and created the virtual server in disabled state so it wouldn't interfere with the same virtual server of the LTM ID 2, or I thought it would be that simple. But even if the virtual server was disabled, it seems the LTM ID 1 broadcasted the virtual server's IP with the arp address of the vlan it is connected to, thus making it impossible for a client to contact the virtual server on the LTM ID 2 where it was originally running. Even after deleting the virtual server on LTM ID 1 the traffic was still being directed to the new virtual server, and the only way to fix this was rebooting the LTM ID 2 so it would broadcast the virtual server address as it's own again.
That's just one example of the many times I have come across this problem and it's silly to have to reboot the LTM just for a change like that one, there must be a way, right ? or what happens when both LTM are configured in H.A. when the active box goes offline and the standby one becomes active ?