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brett_01_135751's avatar
brett_01_135751
Icon for Nimbostratus rankNimbostratus
Mar 15, 2014

f5 and bgp

So some background first:   I'm doing a POC/lab test at the moment and this is what I am trying to achieve:   Pair of load balanced DNS Servers sitting behind a single ipv4 address with a healt...
application delivery
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brett_01_135751's avatar
brett_01_135751
Icon for Nimbostratus rankNimbostratus
Mar 17, 2014

So for everybody elses benefit with the help of one of my colleagues I did find the answer to this:

 

I added:

 

aggregate-address 222.222.222.0/24 summary-only

 

to the zebos config on the f5 Now when the DNS servers are working the /24 (instead of the /32) is advertised and when they stop working the /24 gets withdrawn.

 

The next stage that I need to to go to now is to add a second virtual server (within the same /24) also running a pair of DNS servers (for a different zone).

 

Then my logic needs to be if either of these virtual servers stop responding to DNS queries withdraw the whole /24. As the config stands at the moment both real_servers behind both virtual servers would need to go down before the route was withdrawn.

 

Any pointers are appreciated.