Bug ID 568670: ASM fails to start with error - ndefined subroutine &F5::CRC::get_crc32

Last Modified: Aug 19, 2026

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

Known Affected Versions:
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, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4

Fixed In:
12.1.0

Opened: Jan 19, 2016

Severity: 3-Major

Symptoms

ASM fails to start with error in ts_debug.log - Undefined subroutine &F5::CRC::get_crc32 called at /usr/local/share/perl5/F5/RamCache.pm line 69

Impact

asm fails to start

Conditions

asm provisioned

Workaround

n/a

Fix Information

A rare condition in which asm fails to start has been fixed

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips