Bug ID 1196665: Required TCAM rules are deleted when virtual server configuration is modified

Last Modified: Feb 07, 2024

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

Known Affected Versions:
15.1.8,,, 15.1.9,, 15.1.10,,

Fixed In:

Opened: Dec 01, 2022

Severity: 3-Major


All TCAM rules of a virtual server, that has active protection offloaded to hardware, are deleted when a VLAN is removed from the VLAN list of the virtual server. The protection is handled in software afterwards.


The activated protection is handled by software only.


- Virtual server is configured with an enable VLAN list. - Security or SYN cookie protection is activated and offloaded to hardware. - A VLAN is deleted from the VLAN list of the virtual server.



Fix Information

Updated TCAM rule management logic of deleting VLANs, TCAM rules of a virtual server are not deleted.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips