Bug ID 600119: DNS name resolution for servers outside of Network Access Name Split scope can be slow in some conditions

Last Modified: Sep 13, 2023

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

Known Affected Versions:
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

Fixed In:
13.0.0, 12.1.2

Opened: Jun 18, 2016

Severity: 3-Major

Symptoms

When connected to the vpn and wifi adapter is enabled (not connected to any wlan) access to websites outside the vpn is very slow. Access is fine when wifi interface is disabled.

Impact

User experience while navigating servers outside of VPN scope is impacted by increased connection time

Conditions

- number of DNS servers configured for active network adapters matches the number of DNS servers configured in Network Access resource

Workaround

Disable unused adapters or change the number of configured DNS servers

Fix Information

DNS requests for names outside the VPN scope sent to VPN DNS server are redirected to DNS servers from NIC using Round Robin algorithm

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips