> On Jul 22, 2016, at 1:37 PM, Grzegorz Janoszka <grzeg...@janoszka.pl> wrote: > > On 2016-07-22 15:57, William Herrin wrote: >> On a link containing only routers, you can safely increase the MTU to >> any mutually agreed value with these caveats: > > What I noticed a few years ago was that BGP convergence time was faster with > higher MTU. > Full BGP table load took twice less time on MTU 9192 than on 1500. > Of course BGP has to be allowed to use higher MTU. > > Anyone else observed something similar?
This has been well known for years: http://morse.colorado.edu/~epperson/courses/routing-protocols/handouts/bgp_scalability_IETF.ppt You have to adjust the MTU, Input queues and such. The default TCP stack is very conservative. - Jared
