Passing by here to drop another ping on the MRAI - Minimum Route Advertisement Interval in the BIRD, and also on the RFD - Route-Flap-Dampening.
Em qui., 8 de jul. de 2021 às 17:18, Douglas Fischer < fischerdoug...@gmail.com> escreveu: > Hello all. > > Last weeks I'm noticing the increase the increase of BGP messages on some > routers that I have access to. > Specially those connected to IXPs with a considerable number of > participants. > I Checked and the BGP process has increased a bit the use of CPU Also. > So, I suspect that Route-Servers are receiving and forwarding Route Flaps > from one or more participants... > > I know that the right place to fix that would be on the source of those > flaps... > But... Considering IXPs with one ou two thousand participants, there will > always be someone flapping some routes. > > Bird is widely used as the BGP engine on IXP route-servers. > And exactly because of that I came here to ask about Route Flap avoidance > mechanisms on Bird. > > The discussion of methods to avoid Route Flapping in BGP is very > controversial. > - RFD - Route Flapping Dampening comes and goes. > - MRAI is not a consensus, but there is a lot of effort on that, > including som magic algorithms define some variable interval according to > conditions. > - I even saw some ultra-rigorous ideas like rate limiting the BGP > messages... > > Before I come here to bore you with this, I searched a bit on mail list > and documentation of Bird and I found the links bellow related to that: > > There is any work running to deal with that route-flapping question? > > https://bird.network.cz/ - 7.1 Future work > <https://bird.network.cz/?get_doc&v=20&f=bird-7.html> > Question about BGP advertisement-interval in BIRD > <http://trubka.network.cz/pipermail/bird-users/2020-August/014786.html> > [BGP] MRAI connection-based implementation review > <http://trubka.network.cz/pipermail/bird-users/2020-April/014433.html> > Route Flap Dampening > <http://trubka.network.cz/pipermail/bird-users/2019-July/013589.html> > [BGP] bird and RFD > <http://trubka.network.cz/pipermail/bird-users/2020-May/014612.html> > > Thank you all! > > -- > Douglas Fernando Fischer > Engº de Controle e Automação > -- Douglas Fernando Fischer Engº de Controle e Automação
