Manual Chapter : Connection Termination Reasons

Applies To:

Versions

BIG-IP LTM

15.1.10, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0, 14.0.1, 14.0.0, 13.1.5, 13.1.4, 13.1.3, 13.1.1, 13.1.0

Updated Date: 07/07/2026

Connection Termination Reasons

If logging of reset cause is enabled via the tm.rstcause.log db variable, the reason for connection termination is logged to /var/log/ltm.

Reset reason examples:

Reason Why Text	Description
SIP Error	Unexpected internal signaling
SIP parser error	Unable to parse SIP message on a stream transport (like TCP)