Re: netlink filtering to avoid clostly FNHE table dumps on Linux

2022-01-08 Thread Tomas Hlavacek
Hi Ondrej, all, On Sat, Jan 8, 2022 at 5:56 AM Ondrej Zajicek wrote: > > I believe that many different types of Linux tunnels create the PMTU > > records for all packets transmitted over the tunnel as well. And it > > works like that for a long time - the code that creates the route > > cache

Re: netlink filtering to avoid clostly FNHE table dumps on Linux

2022-01-07 Thread Ondrej Zajicek
On Sat, Jan 08, 2022 at 12:03:52AM +0100, Tomas Hlavacek wrote: > Hi! > > The large table that BIRD pulled from the kernel was a FNHE table > where Linux collects PMTU records for *all* destination IPs that are > routed to the tunnel (which does not seem to be right and I will > discuss it in

netlink filtering to avoid clostly FNHE table dumps on Linux

2022-01-07 Thread Tomas Hlavacek
Hi! This is not a direct follow-up on the thread "BIRD trying to reinsert existing kernel routes, netlink issue?" ( https://www.mail-archive.com/bird-users@network.cz/msg05429.html ) but I think that the cause of my issue can be the same. My scenario: I have a server in LAB that has a public IP