Bug ID 1018673: Virtual Edition systems replicate host traffic to all TMMs when a multicast MAC address is the traffic's nexthop

Last Modified: Apr 24, 2024

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,,, 15.1.9,, 15.1.10,,,, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,,,, 16.1.4,,,, 17.0.0,,

Opened: May 14, 2021

Severity: 3-Major


When BIG-IP Virtual Edition receives a host packet that has a multicast MAC address as its nexthop, it will disaggregate this by forwarding it to all TMMs. This results in all TMMs egressing the packet.


Extraneous packets are egressed from the BIG-IP.


-- BIG-IP Virtual Edition -- A route is configured to a multicast MAC address -- Host traffic (e.g. non-TMM monitors, ping, etc.) is routed to the multicast MAC address


Partial workaround for the case of monitors: use in-TMM monitors where possible. Otherwise, there is no workaround for this.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips