having trouble getting bird an juniper to be happy with BFD

[Jerry Scharf]

Please ignore this. A typo in iptables...

On 08/18/2017 01:43 PM, Jerry Scharf wrote:
> Hi,
> 
> I'm confused with what is going on with this.
> 
> Here are the config snippets for what I am doing:
> 
> this sets up the bgp peer that I am monitoring:
> template bgp tocore {
>      description "bgp to data center as";
>      local as 65304;
>      direct;
>      export filter inside_export;
>      import filter inside_import;
>      next hop self;
>      bfd on;
> }
> 
> protocol bgp inside_netA from tocore {
>      neighbor 10.12.0.3 as 65304;
>      source address 10.12.0.11;
> }
> 
> this is the bfd config:
> protocol bfd {
>      interface "edge*" {
>          interval 300  ms;
>          multiplier 3;
>      };
>      interface "net*" {
>          interval 300  ms;
>          multiplier 3;
>      };
> }
> 
> Other than not defining any neighbors directly, it looks just like the 
> docs as far as I can tell.
> 
> BGP is working, the peering is established and the routes are passing 
> correctly.
> 
> here is the show protocols all from birdc:
> bfd1     BFD      master   up     13:16:07
>    Preference:     0
>    Input filter:   ACCEPT
>    Output filter:  REJECT
>    Routes:         0 imported, 0 exported, 0 preferred
>    Route change stats:     received   rejected   filtered    ignored 
> accepted
>      Import updates:              0          0          0          0      0
>      Import withdraws:            0          0        ---          0      0
>      Export updates:              0          0          0        ---      0
>      Export withdraws:            0        ---        ---        ---      0
> 
> 
> 
> This machine is .11 and the juniper is .3 on the 10.12.0 net. Here is 
> the tcpdump output:
> 13:37:23.444104 IP 10.12.0.11.38316 > 10.12.0.3.bfd-control: BFDv1, 
> Control, State Down, Flags: [none], length: 24
> 13:37:24.251246 IP 10.12.0.11.38316 > 10.12.0.3.bfd-control: BFDv1, 
> Control, State Down, Flags: [none], length: 24
> 13:37:24.408134 IP 10.12.0.3.49152 > 10.12.0.11.bfd-control: BFDv1, 
> Control, State Init, Flags: [Control Plane Independent], length: 24
> 13:37:25.056399 IP 10.12.0.11.38316 > 10.12.0.3.bfd-control: BFDv1, 
> Control, State Down, Flags: [none], length: 24
> 13:37:25.571488 IP 10.12.0.11.bgp > 10.12.0.3.63762: Flags [P.], seq 
> 54144952:54144971, ack 992801306, win 237, options [nop,nop,TS val 
> 995413 ecr 83872572], length 19: BGP, length: 19
> 13:37:25.673017 IP 10.12.0.3.63762 > 10.12.0.11.bgp: Flags [.], ack 19, 
> win 16384, options [nop,nop,TS val 83880802 ecr 995413], length 0
> 13:37:25.847516 IP 10.12.0.11.38316 > 10.12.0.3.bfd-control: BFDv1, 
> Control, State Down, Flags: [none], length: 24
> ^C13:37:26.408150 IP 10.12.0.3.49152 > 10.12.0.11.bfd-control: BFDv1, 
> Control, State Init, Flags: [Control Plane Independent], length: 24
> 13:37:26.737727 IP 10.12.0.11.38316 > 10.12.0.3.bfd-control: BFDv1, 
> Control, State Down, Flags: [none], length: 24
> 
> and so on
> 
> So clearly from tcpdump bird is always saying down and so nothing is 
> setting up. What do I need to do. This is running 1.6.0 right now.
> 
> jerry
> 

-- 
Jerry Scharf, Soundhound DevOps
"What could possibly go wrong?"