Last Modified: Oct 06, 2020
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BIG-IP GTM, LTM
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
12.0.0, 11.6.0 HF5, 11.5.1 HF6
Opened: Sep 19, 2014
Related AskF5 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.
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.