Bug ID 423705: SIP monitor doesn't retransmit requests

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
10.1.0, 10.2.0, 10.2.1, 10.2.2, 10.2.3, 10.2.4, 11.0.0, 11.1.0, 11.2.0, 11.2.1, 11.3.0, 11.4.0, 11.4.1

Fixed In:
11.5.0, 11.4.1 HF4, 11.4.0 HF6, 11.2.1 HF11

Opened: Jun 20, 2013
Severity: 2-Critical
Related AskF5 Article:


SIP monitor does not re-transmit requests. The SIP monitor is intended to re-transmit a UDP SIP request if it hasn't received a response after 0.5s, 1s, 2s, and 4s (after each re-transmission, the interval increases).


SIP monitor doesn't retransmit. This could mean adverse side affects: for example, the pool member won't change states.


Server doesn't respond to request before the interval expires.


restart bigd.

Fix Information

The SIP monitor will now internally retransmit a request after 0.5, 1, 2, and 4 seconds.

Behavior Change