Bug ID 774817: ICMP packets are intermittently forwarded out of both VLAN group members

Last Modified: Dec 13, 2023

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

Known Affected Versions:
14.0.0,,,,,, 14.0.1,, 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,

Fixed In:
16.0.0, 15.1.10

Opened: Apr 19, 2019

Severity: 3-Major


ICMP packets sent out on the wrong interface.


The ICMP packet sent out on the wrong VLAN is dropped by the receiving router because the destination MAC address does not match that of the router. Typically, a topology for asymmetric traffic flows across VLAN groups has VLAN asymmetry built in using routers.


BIG-IP system is configured in VLAN group-based L2 transparent mode.



Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips