On 17 April 2018 at 11:57, Gert Doering <g...@greenie.muc.de> wrote: > Hi, > > On Tue, Apr 17, 2018 at 12:34:18PM +0300, Saku Ytti wrote: >> On 17 April 2018 at 11:25, James Bensley <jwbens...@gmail.com> wrote: >> >> > Also you say you have OSPF and LDP up but if you bring up BGP over >> > this link you may have issues. BGP packs UPDATE messages up to the TCP >> > MSS (derived from the link MTU). If you are carrying the full table >> >> BGP messages are limited to 4096. > > Which does not stop TCP from coalescing two messages into one 8 kbyte packet. > > (As in "I have had a link that was transported over someone else's packet > network, and when they re-routed in an outage, I lost 8 bytes MTU, > resulting in TCP failing across a 9200-minus-8-byte-link...")
This is what I have observed on IOS, UPDATES are packed to the TCP MCC. Not sure if it's the case for Junos too but I simply wouldn't risk it. Cheers, James. _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
