Bug ID 624671: A route for /32 mask cannot be added

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 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, 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, 12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0

Opened: Oct 25, 2016

Severity: 3-Major

Symptoms

Adding a route for /32 mask is allowed, with no error message, however, /32 route will not be populated into kernel. You will see error messages in /var/log/ltm: -- err chmand[2476]: 012a0003:3: Kernel returns error : Network is unreachable. -- err chmand[2476]: 012a0003:3: Mgmt Operation:0 Dest:7.7.7.7. -- err chmand[2476]: 012a0003:3: Prefix Length:32 Gateway:10.255.0.1 mgmt:0.

Impact

Route is not added to the routing table.

Conditions

Complex route overriding default routes and adding /32 mask route

Workaround

None.

Fix Information

Fixed an issue preventing routes for /32 subnet masks from being added.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips