Bug ID 480299: Delayed update of Virtual Address might not always happen.

Last Modified: May 29, 2024

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

Known Affected Versions:
11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.6.2 HF1, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.0.0, 11.6.0 HF5, 11.5.1 HF6

Opened: Sep 19, 2014

Severity: 2-Critical

Related Article: K16627


When a Virtual IP status changes such that a Virtual Address should transition from down to up, the update does not always get to all subscribers.


RHI might never be re-announced. The delayed update might not propagate the status change, because of the assumption that the previous update reached all subscribers, and might skip the delayed update.


Route Health Injection (RHI)-enabled Virtual Address and routing protocol on the Virtual IP.



Fix Information

Virtual Address delayed update mechanism now sends delayed updates approximately three seconds after change, regardless of previous status, guaranteeing that Virtual Address status reaches all subscribers.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips