[EXT] Re: Troubleshooting BIRD as flowspec manager

[Noris Rogers]

Sure! r1, r2, and r3 are FRR clients. BGP relationships are successfully formed and BGP routes are exchanged, but no flowspec is seen on the clients. I am currently analyzing packet captures, but still haven’t completely understood where in the packet header the flowspec is/should be.

log syslog all;

router id 4.4.4.4;

protocol device {
    scan time 10;
}

flow4 table flowtab4;

protocol static flowspec4{
  flow4 {
      import all;
      export all;
  };

  route flow4 {
      dst 172.16.0.1/32;
  }{
      bgp_ext_community.add((generic, 0x80060000, 0x0));
  };
}

template bgp bgp_fs_temp {
    local as 4;
    ipv4 {
        import all;
        export all;
    };
    flow4 {
        table flowtab4;
        import none;
        export all;
    };
}

protocol bgp r1 from bgp_fs_temp {
    neighbor 172.16.4.2 as 1;
}
protocol bgp r2 from bgp_fs_temp {
    neighbor 172.16.4.6 as 2;
}
protocol bgp r3 from bgp_fs_temp {
    neighbor 172.16.4.10 as 3;

Thank you!

Noris

From: 彭勇 <ppyy at pubyun.com>
Sent: Thursday, August 26, 2021 11:17 PM
To: Noris Rogers <nrogers at mitre.org>
Cc: bird-users at network.cz
Subject: [EXT] Re: Troubleshooting BIRD as flowspec manager

can you share your config file to let us check?

On Wed, Aug 25, 2021 at 4:23 AM Noris Rogers <nrogers at mitre.org<mailto:nrogers at mitre.org>> wrote:
Hello,

I am seeking to setup BIRD as a flowspec manager to send messages to FRR acting as a flowspec client. However, upon successful configuration of BGP relationships and advertising BGP routes, FRR is not able to see any flowspec rules. Is there a way to check to make sure BIRD is actually sending the flowspec rules with the BGP advertisements?

Thanks!
Noris



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彭勇 (Peng Yong)
江苏网擎信息技术有限公司
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