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SBC sending BYE to Session Participants After 300 Seconds (Doc ID 2207298.1)

Last updated on SEPTEMBER 29, 2020

Applies to:

Acme Packet 4600 - Version S-Cx6.4.0 to S-Cz7.3.0 [Release S-Cx6.0 to S-Cz7.0]
Information in this document applies to any platform.


Customer reports that chat session was getting closed after some time.

Wireshark traces showed that SBC was closing the session by sending BYE to both side of the call.

While troubleshooting this report, we suspected customer was using MSRP session for Instant Messaging hence asked them to modify following parameter under Media-Manager :

tcp-subsq-guard-timer 300

As per the ACLI Guide : t

Allowable command values: 0 to 999999999 (seconds)
Default value: 300

Timer Expiration:
Initiates tear down of the TCP connection. In the possible, but unlikely event that the value assigned to this timer is less than the value assigned to the MSRP interval timer, expiration initiates forwarding of the delayed BYE request to the recipient MSRP endpoint and tear down of the TCP connection.

This did not resolve the behavior.


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