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

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4

Fixed In:
12.0.0, 11.6.0 HF5, 11.5.1 HF6

Opened: Sep 19, 2014
Severity: 2-Critical
Related AskF5 Article:
K16627

Symptoms

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.

Impact

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.

Conditions

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

Workaround

None.

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