SIP 200 OK packet dropped by SIP ALG

SIP 200 OK packet dropped by SIP ALG

SIP 200 OK packet dropped by SIP ALG with the following errors:

Further troubleshooting by enabling the following traceoptions:

The error as in the sip-trace-detail file shows:

Following is a packet capture of the SIP 200 OK packet which matches the above trace:

SIP 200 OK packet dropped by SIP ALG

Matching this debug to the above packet capture, the error occurs in the To field where the “SIP Display info” contains the following “” NULL content as shown highlighted in the above picture.

The SRX SIP ALG had an issue with parsing the above mentioned NULL content. This issue has been fixed from the following releases 10.4R5, 10.2R5. 10.3R4, 11.1R2.

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Prasanna

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