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

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2

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:


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.


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


Many connections.


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