30 Sep
2017
30 Sep
'17
6:44 p.m.
On Sat, 30 Sep 2017 at 15:33, William Herrin <bill@herrin.us> wrote:
To the chucklehead who started announcing a 2200+ byte AS path yesterday around 18:27 EDT, I beg of you: STOP. You've triggered a bug in Quagga that's present in all versions released in the last decade. Your announcement causes routers based on Quagga to send a malformed update to their neighbors, collapsing the entire BGP session. Every 30 seconds or so.
For everyone else: please consider filtering BGP announcements with stupidly long AS paths.
Nowhere in the BGP RFCs it says it is okay for the software to crash. Bugs happen. You patch and move on. :-)