Session Border Controller : SIP Invite gets Rejected with 422 Session Interval Too Small (Doc ID 2374274.1)

Last updated on OCTOBER 03, 2023

Applies to:

Symptoms

The far end endpoint is expecting session-expires to be at least 3600 seconds but the invite is coming with only 1800s so this invite is rejected with 422 error.

To modify session-expires timer from 1800 to 3600.

Initial invite comes in with Session-Expires: 1800 :

INVITE sip:<NUM>@<IP>:<PORT>;transport=tcp SIP/2.0
Via: SIP/2.0/TCP <IP>:<PORT>;branch=z9hG4bKl5s2ht300o30apo02090.2
From: "<USER NAME>" <sip:<NUM>@<IP>:<PORT>>;tag=<IP>+1+2c7eff8+f20f4606
To: <sip:<NUM>@<IP>:<PORT>>
CSeq: 30326 INVITE
Expires: 60
Supported: 100rel
Content-Length: 237
Call-Info: <sip:<IP>:<PORT>;method="NOTIFY;Event=telephone-event;Duration=2000"
Contact: <sip:<IP>:<PORT>;transport=tcp>
Content-Type: application/sdp
Call-ID: 408b5f7566e29c11afcbc4e42a8bf522@<IP>
Max-Forwards: 24
Session-Expires: 1800
Accept: application/sdp, application/dtmf-relay

The endpoint is rejecting it with 422:

SIP/2.0 422 Session Interval Too Small
From: "<USER NAME>" <sip:<NUM>@<IP>>;tag=<IP>+1+2c7eff8+f20f4606
To: <sip:<NUM>@example.com>;tag=066928aee30e81ad825ab8995900
Call-ID: 408b5f7566e29c11afcbc4e42a8bf522@<IP>
CSeq: 30326 INVITE
Via: SIP/2.0/TCP <IP>:<PORT>;branch=z9hG4bKl5s2ht300o30apo02090.2
Server: <SERVER DATA>
Min-SE: 3600
Content-Length: 0

Changes

Cause

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