Hello Baldur, What routers are you running?
-Mike > On May 15, 2019, at 11:22, Baldur Norddahl <baldur.nordd...@gmail.com> wrote: > > Hello > >> On Wed, May 15, 2019 at 3:56 PM Mike Hammett <na...@ics-il.net> wrote: >> What is the most common platform people are using with such limitations? How >> long ago was it deprecated? >> >> > > We are a small network with approx 10k customers and two core routers. The > routers are advertised as 2 million FIB and 10 million RIB. > > This morning at about 2 AM CET our iBGP session between the two core routers > started flapping every 5 minutes. This is how long it takes to exchange the > full table between the routers. The eBGP sessions to our transits were stable > and never went down. > > The iBGP session is a MPLS multiprotocol BGP session that exhanges IPv4, IPv6 > and VRF in a single session. > > We are working closely together with another ISP that have the same routers. > His network went down as well. > > Nothing would help until I culled the majority of the IPv6 routes by > installing a default IPv6 route together with a filter, that drops every IPv6 > route received on our transits. After that I could not make any more > experimentation. Need to have a maintenance window during the night. > > These routers have shared IPv4 and IPv6 memory space. My theory is that the > combined prefix numbers is causing the problem. But it could also be some > IPv6 prefix first seen this night, that triggers a bug. Or something else. > > Regards, > > Baldur > >
