Hello! You won't advertise anything else than basic IPv4 routes with capabilities off as the flowspec SAFI needs to be advertised and negotiated by a BGP Capability Advertisement. Maria On 1/21/20 2:05 PM, posta@davidepucci.it wrote:

Hi. I'm setting up Bird (2.0.7) as a BGP FlowSpec controller and it has to send out FS routes to two (FRR-based) neighbors. Actual configuration is defined as below:

flow4 table flowtab4; protocol static {         flow4 {         import all;         export all;     };

        route flow4 {                 src x.x.y.y/32;                 dst x.x.z.z/32;         } {                 bgp_ext_community.add( (generic, 0x80060000, 0x0) );         }; } template bgp bgp_fs {     local x.x.x.x as ABCDG;     capabilities off;

        flow4 {         table flowtab4;                 import all;                 export all;         };

    ipv4 {         import all;         export all;     }; } protocol bgp bgp_svc01 from bgp_fs {     neighbor y.y.y.y as ABCDE; } protocol bgp bgp_svc02 from bgp_fs {      neighbor z.z.z.z as ABCDF; }

The FS is properly assigned to the BGP protocol instances, but flowtab4 table is only UP as a channel for static1 protocol, while for bgp_svc01/02 is not (hence, no FS routes advertised BGP-side):

bird> show protocol all static1 Name       Proto      Table      State  Since         Info static1    Static     flowtab4   up     13:02:42.987   Channel flow4     State:          UP     ==================     Table:          flowtab4     Preference:     200     Input filter:   ACCEPT     Output filter:  ACCEPT     Routes:         1 imported, 0 exported, 1 preferred     Route change stats:     received   rejected   filtered    ignored   accepted       Import updates:              1          0          0          0          1       Import withdraws:            0          0        ---          0          0       Export updates:              0          0          0        ---          0       Export withdraws:            0        ---        ---        ---          0

bird> show protocol all bgp_svc01 Name       Proto      Table      State  Since         Info bgp_svc01  BGP        ---        up     13:00:17.256  Established   BGP state:          Established     Neighbor address: y.y.y.y     Neighbor AS:      ABCDE     Local AS:         ABCDG     Neighbor ID:      whateverID     Local capabilities     Neighbor capabilities     Session:          external     Source address:   x.x.x.x     Hold timer:       4.820/9     Keepalive timer:  2.054/3   Channel flow4     State:          DOWN     ====================     Table:          flowtab4     Preference:     100     Input filter:   ACCEPT     Output filter:  ACCEPT   Channel ipv4     State:          UP     Table:          master4     Preference:     100     Input filter:   ACCEPT     Output filter:  ACCEPT     Routes:         13 imported, 2 exported, 13 preferred     Route change stats:     received   rejected   filtered    ignored   accepted       [...]     BGP Next hop:   x.x.x.x

Looking forward to get some clarifications. Thank you.

Kind regards, Davide Pucci.