Re: [j-nsp] IPv4 BFD flaps on MX204

2020-08-19 Thread Mark Tinka
On 19/Aug/20 10:37, Antti Ristimäki wrote: > Hi, > > In fact inline IPv6 BFD is supported for other than link-local addresses > starting from 18.1 IIRC. This doesn't help for IS-IS or OSPFv3, though, as > those use link-local addresses for adjacencies. > > We do have IPv6 BFD enabled for IS-IS

Re: [j-nsp] IPv4 BFD flaps on MX204

2020-08-19 Thread Antti Ristimäki
Hi, In fact inline IPv6 BFD is supported for other than link-local addresses starting from 18.1 IIRC. This doesn't help for IS-IS or OSPFv3, though, as those use link-local addresses for adjacencies. We do have IPv6 BFD enabled for IS-IS but with very relaxed timers compared to IPv4. Haven't s

Re: [j-nsp] IPv4 BFD flaps on MX204

2020-08-18 Thread Mark Tinka
I'd recommend disabling IPv6 BFD for now as well. It's not handled in hardware, and so if it drops, you would lose your IGP. Worse if you run multiple address families in your IGP, e.g., IS-IS, or IPv4 over OSPFv3 . Hardware support for BFDv6 is coming in 1H'21. Mark. On 18/Aug/20 13:01, Mihai w

Re: [j-nsp] IPv4 BFD flaps on MX204

2020-08-18 Thread Mihai
Hi Ivan, Indeed, that was the issue, thanks! Regards On 18/08/2020 09:54, Ivan Malyarchuk wrote: If you have many uncontrolled directly connected L2 domains like IX-es or customers, check policer __default_arp_policer__. If there are drops, you need to apply interface-specific arp policers to

Re: [j-nsp] IPv4 BFD flaps on MX204

2020-08-18 Thread Ivan Malyarchuk
If you have many uncontrolled directly connected L2 domains like IX-es or customers, check policer __default_arp_policer__. If there are drops, you need to apply interface-specific arp policers to interfaces with protocols and/or to source of arp bursts. 18.08.2020 02:35, Mihai пишет: Hi, I

Re: [j-nsp] IPv4 BFD flaps on MX204

2020-08-17 Thread Mark Tinka
On 18/Aug/20 01:35, Mihai wrote: > Hi, > > I have a MX204 with a couple of OSPF/OSPFv3 adj to other MXs over two > et- interfaces, BFD enabled for both protocols. > At random intervals the IPv4 BFD sessions are flapping with or without > the 'no-delegate-processing' option, however the IPv6 ses

[j-nsp] IPv4 BFD flaps on MX204

2020-08-17 Thread Mihai
Hi, I have a MX204 with a couple of OSPF/OSPFv3 adj to other MXs over two et- interfaces, BFD enabled for both protocols. At random intervals the IPv4 BFD sessions are flapping with or without the 'no-delegate-processing' option, however the IPv6 sessions are stable (they are using the same ti