Problem registering with SIP trunk provider

[tmorton111]

Having trouble getting a 2621xm to register with Flowroute SIP provider.

show sip-ua register status   comes up with nothing:

R2#sh sip-ua register status

Line          peer           expires(sec)  registered

============  =============  ============  ===========

R2#

I'm trying to integrate the 2621xm into my existing home network to setup a voip test lab. The network layout is like so:

ISP -> Cable modem -> Linksys E4200 w/DD-WRT -> 2621xm

I'm able to connect to flowroute and make calls using the X-Lite softphone on a PC connected to the Linksys.

Could the 2621 be having trouble with the NAT running on the linksys? I've tried forwarding ports 5060 and 10000-20000 in the linksys to the 2621's internal IP (192.168.2.9) and I also tried putting the 2621 in the linksys DMZ, but still no luck with the sip registration.

2621xm config is attached. Please help me troubleshoot, I'm a voip newbie.

Thank you!

[tmorton111]

Ok, I've bypassed the linksys and connected the 2621 directly to my cable modem. I can ping out to sip.flowroute.com and there are no inbound access rules.

But the router is still not sending sip packets to flowroute. I engaged flowroute support and they confirmed they are not seeing sip packets on their end. What can I try to fix this?

Thank you.

[Dennis Mink]

Can you run debug ccsip to see what is going on, I would be particularly interested to see if your 2621 is actually trying to register with flowroute. (attach output)

also, is your 8.8.8.8 name server correct?

can you resolve sip.flowroute.com   from the router?

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[tmorton111]

debug ccsip all shows nothing. It's like the router isn't even trying to reach out to sip.flowroute.com.

I waited a few minutes, but no messages in the terminal:

Router#debug ccsip all

This may severely impact system performance. Continue? [confirm]

All SIP Call tracing is enabled

Router#

Router#

Router#

Router#

8.8.8.8 is the dns server I'm using for testing. No problems with name resolution:

Router#ping sip.flowroute.com

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 216.115.69.144, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 88/88/92 ms

Router#

Thank you.

[tmorton111]

I'm seeing these messages in the debug:

Router(config)#

*Mar  2 03:43:42.301: //-1/xxxxxxxxxxxx/SIP/Info/ccsip_register_configured_dest_patterns: No destination patterns to Register

*Mar  2 03:43:42.301: //-1/xxxxxxxxxxxx/SIP/Info/ccsip_register_reset_dns_cache: CCSIP_REGISTER:: Primary registrar DNS resolved addr reset

Router(config)#

Any ideas? Thanks.

[Jagpreet Singh · Accepted solution]

Hi,

     I am no CUBE expert, but can you try the following:

> Lets try and decrease the timer value :

     sip-ua

          registrar dns:sip.flowroute.com expires 60

          retry register 10

> Also from the config which you posted, if 12345 is the username which the ITSP provided, then try the following:

telephony-service
 max-dn 1
 ip source-address 192.168.2.9 port 2000
ephone-dn 1
  number 12345
Let me know if that helps, if it does not please collect the debugs with the config in place and update. 
Regards,
Jagpreet

[tmorton111]

Jagpreet, thank you very much! This command got it working:

ephone-dn1

number 12345

As soon as I entered that, the debug messages started flowing and the router sucessfully registered with Flowroute:

Router#sh sip-ua register status

Line          peer           expires(sec)  registered

============  =============  ============  ===========

12345       20001            2062          yes

Router#

Thanks for the help!