On 18/Mar/20 22:22, Nick Hilliard wrote:
> Yeah. I was thinking more for the case of customer-facing anycast
> resolvers, in which case BGP down means that the network is down, and
> if the network is down it doesn't matter than DNS is also down because
> their shared fate means that when BGP is back up, DNS will start
> working again.
As much as possible, I'll always choose to have the most basic
infrastructure available under abnormal conditions, regardless of the
service.
ME3600X's and ASR920's, for example, will install 0/0 and ::/0 in FIB
last. If your access to the core depends entirely on BGP in such
scenarios, you will be unable to access it for as much as 10 minutes.
Mark.
