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ringoseagull_77's avatar
ringoseagull_77
Icon for Nimbostratus rankNimbostratus
Jan 30, 2014
Solved

Do F5s continue to advertise virtual server IPs after they have been disabled or deleted?

I've been doing a migration from a pair of 1500s running 10.2.4 to a pair of 5000's running 11.4.1.   After disabling the virtual servers on the old HA pair I enabled them using the same IP addres...
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  • Cory_50405's avatar
    Cory_50405
    Jan 30, 2014

    The LTM should not respond to ARP requests for an IP address assigned to a disabled virtual server. I'm guessing that something is cached within your network, or something is still enabled when it shouldn't be on your 1500s.

     

Cory_50405's avatar
Cory_50405
Icon for Noctilucent rankNoctilucent
Jan 30, 2014

Difficult to say for certain that it was configuration related or not. Disabling the virtual servers on the 1500 pair should have stopped them from responding to ARP requests for the address. If switches in between have the ARP cached though, that really isn't something you can control without manually clearing the cache on the switch.

 

If you wanted to troubleshoot the behavior further, you could setup a dummy virtual server on your 1500 pair and then go through the exercise of trying to migrate it to the 5000 pair and definitively figure out what the issue is. Not sure if your environment will allow you to do something like this, but it would shed some light on your situation.