18 Feb
1999
18 Feb
'99
10:33 p.m.
done it such that we only did prefix filtering, not any as-path filtering, this allows them to prepend as they wish, just not advert anything other than what we filtered them at.
FYI, this is dangerous. For example - You have a customer A who has a customer B. B is multi-homed to A and 701. B's link to A goes down. So, if A's network is broken, they will send you a given prefix with as-path ^701 B$ or ^1239 701 B$ or ..., depending on how B sees 701. And you will transit it. Shouldn't cause any major damage, but something to be aware of.
- Jared
Avi