Bug ID 457509: Temporary multicast packets blackout window during cluster primary transition.

Last Modified: Apr 19, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6

Opened: Apr 16, 2014
Severity: 3-Major


The failure relates to how quickly cross-blade trunk tables can be reconfigured after the primary blade is pulled, or powered down. The mcpd driven trunk_wrkng_member deletes may take too long to reach bcm56xxd on remaining blades, for reconfiguring the trunk tables and selecting the new slot for passing the multicast packets.


The remaining blade(s) may experiencing long delays (4+ secs) before receiving trunk_working_member modify messages, as a result of losing the primary slot, resulting in a temporary multicast blackout window.


Primary blade is pulled, powered down, or otherwise experiencing a terminal failure.



Fix Information


Behavior Change