SIP ALG Issue Cisco-3845

[Hamidsattarrana]

Dear All,

I have some issue with SIP ALG. Result of debugging is below. Kindly someone help me find the solution.

Output of Debug IP NAT Sip:

Nov 2 18:09:11.461: NAT: SIP: [1] translated embedded address 203.68.23.243->192.168.33.150
Nov 2 18:09:11.461: NAT: SIP: [1] register:0 door_created:1
Nov 2 18:09:11.461: NAT: SIP: Contact header found
Nov 2 18:09:11.461: NAT: SIP: Trying to find expires parameter
Nov 2 18:09:11.461: NAT: SIP: [1] register:0 door_created:0
Nov 2 18:09:11.497: NAT: SIP: [0] processing SIP/2.0 200 OK message
Nov 2 18:09:11.497: NAT: SIP: [0] register:0 door_created:0
Nov 2 18:09:11.497: NAT: SIP: [0] register:0 door_created:0
Nov 2 18:09:11.497: NAT: SIP: [0] register:0 door_created:0
Nov 2 18:09:11.497: NAT: SIP: [0] message body found
Nov 2 18:09:11.497: NAT: SIP: Media Lines present:1
Nov 2 18:09:11.501: NAT: SIP: Unable to parse session level c= address
Nov 2 18:09:11.501: NAT: SIP: cannot process body, drop packet

[Hamidsattarrana]

When I make a call to any other extension, the call go directly to voicemail. I have seen Debug IP NAT service output but it was different as compared to my debug IP output. We have 2 VOIP Servers both are on port 5050.
Here is the link:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_nat/configuration/15-mt/nat-15-mt-book/nat-tcp-sip-alg.html

[Hamidsattarrana]

Is there any error in Debug Output?

[Georg Pauwen]

Hello,

do you have a static NAT translation for the SIP TCP port ? Post the full running configuration of your 3845...