Hello K. What does "disabled" setting mean? This is my configuration ================================== protocol bfd { multihop { min rx interval 300 ms; min tx interval 300 ms; multiplier 3; }; } protocol bgp as1 { import all; export all; local ~ as ~; neighbor ~ as ~; enable route refresh off; hold time 90; bfd on; } protocol bgp as2 { import all; export all; local ~ as ~; neighbor ~ as ~; enable route refresh off; hold time 90; bfd on; } ================================== Please check it. Regards. 2020년 7월 20일 (월) 오후 7:48, Kees Meijs | Nefos <kees@nefos.nl>님이 작성:

Hello Seunghwan,

Haven't you got a "disabled" setting in de BIRD configuration file in the protocol portion?

Regards, Kees

On 20-07-2020 03:54, seunghwan hwang wrote:

...

I've already tried capturing tcpdump. BIRD's BFD neighbor was captured sending packets, but the packets sent by BIRD were not captured. In this state, BIRD's BFD packets were captured after restarting BFD protocol. The BFD packet was captured Only after restarting the BFD protocol . Is there an issue with BFD Protocol? Please Check it.