Bug ID 445919: mcpd may core when issuing the command "show sys connection" with a large number of connections

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.6.2 HF1, 11.4.0, 11.4.1

Fixed In:
11.6.0, 11.5.1 HF3, 11.5.0 HF1, 11.4.1 HF4, 11.4.0 HF6

Opened: Jan 23, 2014

Severity: 3-Major

Related Article: K15777

Symptoms

Issuing the command "tmsh show sys conn" when you have over one million connections might cause TMM or MCPD to exhaust its memory and restart.

Impact

mcpd restarts. The BIG-IP system will be unavailable for a few minutes. If there is a standby system, the unit will fail over.

Conditions

Many connections.

Workaround

To avoid the issue, use a filter with the show sys conn command that reduces the result set to below one million results. You can check the number of connections currently running on the system by issuing the command "tmsh show sys performance conn".

Fix Information

Issuing the command "tmsh show sys connection" when you have over one million connections no longer causes TMM or MCPD to core.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips