Customer has below setting under bundle interface.
lacp {
active;
hold-time up 60;
But when bundle interface flapped only, no member interface flap, the bundle interface came up immediately, no damping of bundle interface for 1 min(60 secs)
When there is no member interface flap, only bundle interface flapped due to BFD missing keepalives, the LACP hold-time up 60 is not damping the bundle interface.
Can use bundle interface hold-time up to damping the bundle interface.
e.g.
set interfaces ae23 aggregated-ether-options lacp hold-time up 120.
Please note if both ae interface and member interface flapped with set of both ae and lacp hold-time, then both hold-time will kicked in.
If both ae and member interface flapped with below setting, then 4 minutes for the ae to be marked UP.
set interfaces ae23 hold-time up 120000. << 2 mins
set interfaces ae23 aggregated-ether-options lacp hold-time up 120. << 2 mins
https://www.juniper.net/documentation/us/en/software/junos/cli-reference/topics/ref/statement/hold-time-edit-interfaces.html
https://www.juniper.net/documentation/us/en/software/junos/cli-reference/topics/ref/statement/hold-time-edit-interfaces-lacp.html