Bug ID 507487: ZebOS Route not withdrawn when VAddr/VIP down and no default pool

Last Modified: Apr 10, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP APM(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, 11.5.2, 11.5.2 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4

Fixed In:
12.0.0, 11.6.0 HF5, 11.5.3

Opened: Feb 17, 2015
Severity: 2-Critical
Related AskF5 Article:
K16595

Symptoms

The BIG-IP system continues announcing RHI routes when Virtual Servers and Virtual Addresses are down.

Impact

The kernel route still is announced, which might cause other network devices to be confused on the network status, so the impact varies.

Conditions

The issue occurs in the following case: -- Have a VIP with pool selection via iRule. -- Configure RHI on the VAddr corresponding to the VIP. -- Down the pools (for example, toggling between HTTP monitor (up) and UDP monitor (down)). -- VIP, VAddr, and pools are red. -- Run the imish command.

Workaround

Configure virtual server with default pool instead of iRule.

Fix Information

Added validation for virtual server iRule pools.

Behavior Change