Bug ID 635435: DPD transmit timer has big variations

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 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, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0

Opened: Dec 21, 2016
Severity: 4-Minor

Symptoms

DPD transmit timer had variation about 5 sec and it is OK for big values (like 60 sec) but too big for small values (like 6 sec)

Impact

This problem have (almost) no impacts. The timer variations are visible on tcpdump or highest log level. There is no real functionality effect.

Conditions

small values of DPD timer make this problem visible

Workaround

Mostly cosmetic, does not require mitigation.

Fix Information

After the fix the timer variations became dependable of the basic value and it looks good now.

Behavior Change