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Long BGP AS paths
- Subject: Long BGP AS paths
- From: job at instituut.net (Job Snijders)
- Date: Sat, 30 Sep 2017 22:44:54 +0000
- In-reply-to: <CAP-guGVE2J2ik7brqs=apDoKZA3mmJZLdfF5zk+BRbkLa+=png@mail.gmail.com>
- References: <CAP-guGVE2J2ik7brqs=apDoKZA3mmJZLdfF5zk+BRbkLa+=png@mail.gmail.com>
On Sat, 30 Sep 2017 at 15:33, William Herrin <bill at 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. :-)
>