Cisco Bug: CSCta16946 - incorrect SIP URI - @ sign is present when user field is empty
Feb 21, 2018
- Cisco 2800 Series Integrated Services Routers
Known Affected Releases
Symptom: When an ISDN SETUP message is sent without Calling Line Identity to the ISR, the ISR inserts the following PAID in the SIP INVITE: P-Asserted-Identity: <sip:@126.96.36.199> This is an incorrect SIP URI: the user field is empty and the @ sign is incorrectly included. Third party device does not accept this as valid SIP syntax and rejects the call. They would expect the following PAID: P-Asserted-Identity: <sip:188.8.131.52> Conditions: The ISR sends: P-Asserted-Identity: <sip:@184.108.40.206> We then receive: SIP/2.0 400 Invalid P-Asserted-Identity Note: If they configure a default CLI under the pots dialpeer then the call works, or if the ISDN SETUP has CLI the call works.
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