Bug ID 635435: DPD transmit timer has big variations

Last Modified: Nov 07, 2022

Affected Product(s):
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,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:

Opened: Dec 21, 2016

Severity: 4-Minor


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)


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


small values of DPD timer make this problem visible


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

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips