Bug ID 431936: For the SASP monitor the pool members are indicated as available even when the GWM server is unreachable.

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.2.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Opened: Sep 26, 2013

Severity: 3-Major

Symptoms

The SASP monitor does not mark pool members down when the GWM server cannot be reached.

Impact

The pool members are not marked down for a SASP monitor in case of a GWM/network failure. They are marked down when the TCP connection to the GWM terminates on a connection timeout which was observed around 10 minutes. This is the correct behavior.

Conditions

The GWM server does not send a RST packet to terminate its connection to the SASP monitor in case of a network failure.

Workaround

Use the ICMP monitor in conjunction with the SASP monitor. The ICMP monitor should use the GWM server as its destination. This monitor should be associated with each of the nodes that are present in the pool using the SASP monitor. The pool members will be marked down when the GWM server cannot be reached.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips