[routing-wg] Annoucing supernets in BGP?

Florian Weimer wrote:

> * Michael Markstaller:
> 
> 
>>Is it good/best practice for Swisscom to announce 80/5 into BGP ?
> 
> 
> IIRC, Swisscom does this so that its customers can use routers which
> are not capable of processing the original DFZ, and still have some
> redundancy.  The advertisements should not leak to the general
> Internet.

...whatever the merits of such a setup may be, imho at least minimal
precautions SHOULD be applied, e.g. attaching a "no-export" tag?

>  If the prefixes end up in RIS, this could come from leakage
> by a Swisscom customer (and another upstream which doesn't filter
> properly), or a misconfigured BGP peering for the RIS data feed.

Wilfried