DNS anycast node monitor

Eli Heady eli.heady at gmail.com
Thu Apr 9 18:24:45 UTC 2015

We're considering doing something similar, but have nothing in the way
of scripts to offer.

I'm curious what you mean by 'router injection for DNS virtual
addresses'. Off topic for this list, sorry, but are you meaning that
you're currently using dynamic routing (BGP/OSPF/RIP) in the F5 TMM?

This is another option we are considering and I'm curious whether any
issues apart from cost have caused you to consider alternatives.

Off list replies welcome.


On Thu, Apr 9, 2015 at 10:50 AM, Hillary Nelson
<nelsonhillary8 at gmail.com> wrote:
> Currently we have about 20 DNS servers sit behind two pairs of F5 LTM on
> campus, the two pairs of F5s using router injection for DNS virtual
> addresses. This setup is costly and we are trying to use direct anycast
> between router and server instead, with quagga and bgp.
> The decision of advertise/withdraw route seems to be most critical one. I
> guess we'll need two monitors, one on the server, another like nagios
> monitor from a remote system.  I know there are people doing this for many
> year, wonder if
> there are working script that would like to share.
> Thanks!
> Hillary
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