[as112-ops] AS112 at MSK-IX

[Barry O'Donovan]

Andy Davidson wrote:
>> Transit
> 
> A generic question and not specifically related to Mikhail’s instance
> – does it present an operational concern to anyone if the unicast
> addresses can not be reached?  I ask because this may be a tempting
> AS112 design for IXPs who don’t operate a routed internet service.

Shouldn't be an issue as this is how we run the AS112 instance in INEX
Cork and seems a fairly legit way for IX's to provide the service.

One caveat: we try and convince members to peer directly with the AS112
service as it is less restrictive in BGP filtering than the route
servers. There's an edge case where the IX participant learns the AS112
anycast via the route servers but the as112 node doesn't have a return
route due to strict route server prefix filtering.

 - Barry