Bug ID 445329: DNS cache resolver connections can be slow to terminate

Last Modified: Nov 07, 2022

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

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, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10, 11.5.2, 11.5.2 HF1

Fixed In:
11.6.0, 11.5.3

Opened: Jan 17, 2014

Severity: 1-Blocking

Related Article: K17273


An excessive number of DNS cache resolver connections can build up if local configuration errors (routing, interfaces, VLANs) exist.


An excessive number of outbound DNS cache connections are present.


Local networking configuration errors exist.


Ensure default routes for IPv4 and IPv6 are properly configured and operational.

Fix Information

Local connection errors now cause immediate connection termination.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips