On Fri, Feb 10, 2023 at 03:58:04PM +0000, LIU Chris via Bird-users wrote:
Anyone comment this issue ?
From: Bird-users <bird-users-bounces@network.cz> On Behalf Of LIU Chris via Bird-users Sent: Tuesday, January 24, 2023 4:01 PM To: bird-users@network.cz Subject: RE: Bird bfd configuration
Hello,
I am trying to configure BFD protocol. If configure 2 instances with below, it doesn't work. So I have to configure one instance, and put all the neighbors list to it. Is it possible to configure separate instance ?
Hi Generally, multiple BFD instances are not that useful, as BFD sessions are assigned to the first one that is acceptable, and unless the BFD instance is limited to specific VRF, address family, direct/multihop mode, it accepts all sessions. Note that in contrast to other protocols, you do not need to specify interfaces, all interfaces are allowed by default. If you specify interfaces, it is just for changing per-iface values. So even if you specify just 'interface "eth2"', it will accept BFD sessions for all interfaces. Explicit neighbor statements allow you to define BFD session requests manually in addition to automatic session requests from OSPF, BGP and other protocols. But these are processed in the same way - put to the pool of BFD session requests and then assigned to a matching BFD instance.
The below doesn't work protocol bfd Test1 { interface "eth2" { min rx interval 1000000 us; min tx interval 1000000 us; idle tx interval 3000000 us; multiplier 3; }; neighbor X1.Y1.Z1.A1 local X1.Y1.Z1.B1; }
protocol bfd Test2 { interface "eth0" { min rx interval 1000000 us; min tx interval 1000000 us; idle tx interval 3000000 us; multiplier 3; }; neighbor X2.Y2.Z2.A2 local X2.Y2.Z2.B2; }
Below it is working, protocol bfd Test { interface "eth*" { min rx interval 1000000 us; min tx interval 1000000 us; idle tx interval 3000000 us; multiplier 3; }; neighbor X1.Y1.Z1.A1 local X1.Y1.Z1.B1; neighbor X2.Y2.Z2.A2 local X2.Y2.Z2.B2; }
With best regards,
Chris
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