R: OSPF anycast prefix being filtered

[Patrik Lundin]

On Fri, Apr 10, 2015 at 10:37:01AM +0200, Andrea Costantino wrote:
> A quick hack would be to simply bring down BIRD on the box in
> maintenance. Without BFD it will take 40 sec with standard config.for
> OSPF, while if you use BDF or tweak timers, it could be improved to
> subsecond or bunch of seconds, respectively.
> 

BDF would indeed be an interesting solution, and I notice BIRD has
support for that protocol as well.

>
> I manage a pool of Anycast DNS in different POPs, with both BIRD and
> Quagga (for having some "bug" protection would one fail), and the
> quick and dirty solution for managing upgrade, downtime etc. is to
> bring down the daemon (BIRD or Quagga) on the affected node and wait a
> minute.
> 
> If I need to do a site wide maintenance, I simply passive the OSPF
> interface on both upstream router and in a matter of second all
> traffic moves to another POP.
> 

Thanks a lot for the information, it is intersting to hear what is
working for others!

Regards,
Patrik Lundin