https://community.extremenetworks.com/t5/extremeswitching-exos-switch/bfd-flap/m-p/20478#M1244 Hi,<BR /> <BR /> did you check the GTAC Kownledge article B<A href="https://gtacknowledge.extremenetworks.com/articles/Solution/BFD-session-DOWN-messages-seen-when-the-Rx-Tx-intervals-are-configured-within-200ms/" target="_blank" rel="nofollow noreferrer noopener">FD session DOWN messages seen when the “Rx” &amp; “Tx” intervals are configured within 200ms</A>?<BR /> <BR /> Erik Thu, 29 Jun 2017 21:48:00 GMT Erik_Auerswald 2017-06-29T21:48:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/bfd-flap/m-p/20477#M1243 Switch X670. BDF flapping on all peers. We enable log debug-mode for bfd. (In this log problem start at 1:50). And we can't find trigger for this behaviour.<BR /> Thu, 29 Jun 2017 11:26:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/bfd-flap/m-p/20477#M1243 Sergey_Vekli 2017-06-29T11:26:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/bfd-flap/m-p/20478#M1244 Hi,<BR /> <BR /> did you check the GTAC Kownledge article B<A href="https://gtacknowledge.extremenetworks.com/articles/Solution/BFD-session-DOWN-messages-seen-when-the-Rx-Tx-intervals-are-configured-within-200ms/" target="_blank" rel="nofollow noreferrer noopener">FD session DOWN messages seen when the “Rx” &amp; “Tx” intervals are configured within 200ms</A>?<BR /> <BR /> Erik Thu, 29 Jun 2017 21:48:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/bfd-flap/m-p/20478#M1244 Erik_Auerswald 2017-06-29T21:48:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/bfd-flap/m-p/20479#M1245 I don't think it caused by link detection. All peers is down in same time and no LACP in our case, we use single links. Fri, 30 Jun 2017 01:49:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/bfd-flap/m-p/20479#M1245 Sergey_Vekli 2017-06-30T01:49:00Z