Bug ID 500938: Network Access can be interrupted if second NIC is disconnected

Last Modified: Jul 18, 2026

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

Known Affected Versions:
11.5.1, 11.5.1 hf1, 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, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 11.5.3, 11.5.3 hf1, 11.5.3 hf2, 11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 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

Fixed In:
12.1.0, 12.0.0

Opened: Jan 14, 2015

Severity: 3-Major

Symptoms

Networks Access connection breaks if second NIC disconnects. Both NICs should be connected to same network. This happens for a specific Network Access configuration.

Impact

NA is interrupted.

Conditions

Network Access configuration: * Full tunnel with "Prohibit routing table changes during Network Access connection" set to true. * Split tunneling with "Prohibit routing table changes during Network Access connection" set to true, Address space is 0.0.0.0/0. Client with 2 NICs both connected to the same network.

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips