On Fri, Dec 22, 2017 at 12:40 PM, Nick Hilliard <nick@foobar.org> wrote:
What router software version are you running that barfs on long as-paths?
Hi Nick, Versions of quagga up until the very most recent release corrupt the transmission of routes with very long AS paths. They add up the packet length wrong. The neighbors of any router brand then barf on the malformed data and terminate the BGP session. Your peer running quagga must either upgrade or filter long AS paths or you will receive corrupt data and terminate the BGP session. There's nothing that -you- can do about it. The AS path lengths we're talking about are unreasonable. They indicate a high probability of misconfiguration at the origin. There's no legitimate cause for them to exist on the pubic Internet at all. It would be reasonable to treat them like when peers offer /32 prefixes and just say no. Regards, Bill Herrin -- William Herrin ................ herrin@dirtside.com bill@herrin.us Dirtside Systems ......... Web: <http://www.dirtside.com/>