bird BFD is DOWN

[LIU Chris]

Classified as: {Hitachi Rail – Public}

My setup :
Linux running bird， Peer:  Fortinet Firewall

In bird, configure bfd as below:

protocol bfd BFD_SD_01 {
                interface "*" {
                               min rx interval 1000000 us;
                               min tx interval 1000000 us;
                              idle tx interval 1000000 ums;
                              multiplier 3;
                };
                neighbor 192.168.0.1 local 192.168.0.2;
}

Fortinet side, biasally same, also set rx intrva: 1000 ms, tx interval: 1000ms,  multiplier: 3
However, both side show bfd DOWN。
Catpure tcpdump in Fortinet side,  Fortinet IP: 192.168.0.1
   Time     source      destination protocol    info
1  0.000000 192.168.0.2 192.168.0.1 BFD Control Diag: No Diagnostic, State: Down, Flags: 0x00
6  0.756375 192.168.0.2 192.168.0.1 BFD Control Diag: No Diagnostic, State: Down, Flags: 0x00
11 1.519796 192.168.0.2 192.168.0.1 BFD Control Diag: No Diagnostic, State: Down, Flags: 0x00
14 2.351177 192.168.0.2 192.168.0.1 BFD Control Diag: No Diagnostic, State: Down, Flags: 0x00
19 3.225686 192.168.0.2 192.168.0.1 BFD Control Diag: No Diagnostic, State: Down, Flags: 0x00
24 3.852938 192.168.0.1 192.168.0.2 BFD Control Diag: Control Detection Time Expired, State: Down, Flags: 0x00
25 3.981126 192.168.0.2 192.168.0.1 BFD Control Diag: No Diagnostic, State: Down, Flags: 0x00

from Fortinet neighbour information, it seems cannot receive control message from Peer, why? I don't have any block port. Why get detection time: 1500ms after neighboation
Below is fortinet bfd neighbor information
OurAddress NeighAddress State Interface LDesc/RDesc
192.168.0.1 192.168.0.2 DOWN STN2-SD-A 1/0/M
Local Diag: 1, Demand mode: no, Poll bit: unset
MinTxInt: 1000, MinRxInt: 1000, Multiplier: 3
Received: MinRxInt: 0 (ms), MinTxInt: 0 (ms), Multiplier: 3
Transmit Interval: 6500 (ms), Detection Time: 1500 (ms)
Rx Count: 0, Rx Interval; (ms) min/max/avg 0/0/0
Tx Count: 10287, Tx Interval (ms) min/max/avg 5000/5030/5000, last: 2350 (ms) ago
Registered protocols: Static BGP

Is this bird issue or fortinet?  I suspect 80% caused by Fortiet, but I just want to get some suggestion/proposal from bird expert.

With Best Regards,
Chris LIU

Hitachi Rail – Public


{Hitachi Rail – Public}
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