RV042 - SIP registration fails

suryajayanthi · ‎04-05-2012

Hi,

I have a RV042 and I am not able to receive incoming calls from a SIP provider.

My firewall rules are

1. Unblocked outbound Access.

2. UDP port 5060 is open from the providers server IP to the 10 IP Addresses that are assigned to my phones.

Any help is greatly appreciated.

Thank you.

blwright · ‎04-05-2012

Surya,

In order to properly assist you we will need to know a little more information.

Is your PBX local or hosted?

Do you know if your ITSP requires SIP-ALG to be enabled or disabled?

What are ports required for SIP by your ITSP?

What ports are you forwarding, to what IPs, and what devices?

Your title states that SIP registration fails, but you later stat that you can not receive incoming calls. Do the phones register or are you saying that registration fails because you can not receive calls?

What about out going calls?

Blake Wright

Cisco SBSC Network Engineer

suryajayanthi · ‎04-05-2012

Hi.

My PBX is hosted.

ITSP requires SIP-ALG to be disabled.

SIP port is UDP-5060 is the only port required according to the provider.

My IP Phones are polycom 501's. I am forwarding traffic from the hosted server to the phones ip address on port 5060.

I cannot receive calls, my provider tells me that im not able to recieve calls because SIP registration is failing.

I can make outgoing calls.

Thanks

Surya.

suryajayanthi · ‎04-05-2012

This is the reply from my provider.

Is your PBX local or hosted?

Hosted

Do you know if your ITSP requires SIP-ALG to be enabled or disabled?

disabled

What are ports required for SIP by your ITSP?

UDP 5060

What ports are you forwarding, to what IPs, and what devices?

its not a local server, so there is no need of port forwarding (it is a polycom phone)

Your title states that SIP registration fails, but you later stat that you can not receive incoming calls. Do the phones register or are you saying that registration fails because you can not receive calls?

Here is the status o f the SIP phones registry status

4900/4900                  75.99.166.235    D   N   A  62554    OK (70 ms)

4965/4965                  75.99.166.235    D   N   A  1746     UNREACHABLE

4966/4966                  75.99.166.235    D   N   A  5060     UNREACHABLE

4967/4967                  75.99.166.235    D   N   A  5060     UNREACHABLE

4968/4968                  75.99.166.235    D   N   A  5060     UNREACHABLE

4969/4969                  75.99.166.235    D   N   A  5060     UNREACHABLE

4970/4970                  (Unspecified)    D   N   A  5060     UNKNOWN

4971/4971                  125.62.193.243   D   N   A  49681    OK (344 ms)

4972/4972                  125.62.193.243   D   N   A  47665    OK (336 ms)

4973/4973                  125.62.193.243   D   N   A  27505    OK (341 ms)

4974/4974                  125.62.193.243   D   N   A  26749    OK (328 ms)

4975/4975                  125.62.193.243   D   N   A  5060     OK (327 ms)

4976/4976                  75.99.166.235    D   N   A  5060     UNREACHABLE

999/999                    202.63.125.67    D   N   A  55600    OK (397 ms)

After sometime it shows as below and goes back to the above state.

4900/4900 75.99.166.235 D N A 62554 OK (81 ms)

4965/4965 75.99.166.235 D N A 1746 UNREACHABLE

4966/4966 75.99.166.235 D N A 5060 OK (104 ms)

4967/4967 75.99.166.235 D N A 5060 OK (1102 ms)

4968/4968 75.99.166.235 D N A 5060 OK (100 ms)

4969/4969 75.99.166.235 D N A 5060 OK (114 ms)

4970/4970 (Unspecified) D N A 5060 UNKNOWN

4971/4971 125.62.193.243 D N A 49681 OK (344 ms)

4972/4972 125.62.193.243 D N A 47665 OK (336 ms)

4973/4973 125.62.193.243 D N A 27505 OK (341 ms)

4974/4974 125.62.193.243 D N A 26749 OK (327 ms)

4975/4975 125.62.193.243 D N A 5060 OK (336 ms)

4976/4976 75.99.166.235 D N A 5060 OK (128 ms)

999/999 202.63.125.67 D N A 55600 OK (397 ms)

blwright · ‎04-05-2012

Surya,

SIP-ALG is an embedded feature of the RV042 and can not be disabled. This is probably the cause of your registration issue. If possible I would suggest returning the device to the place of purchase and getting a router that has SIP-ALG as feature that can be enabled or disabled. The RV220W is a wireless router that does have this feature. You may want to call 1.866.606.1866 so that an Engineer can provide presales support for another router. If you follow the link below and look under the firewall tab you will see this feature.

http://www.cisco.com/web/sbtg/gui_mockups/RV220W_v1/home.htm

Blake Wright

Cisco SBSC Network Engineer

suryajayanthi · ‎04-05-2012

Thanks for the quicky reply Blake.

I have a question. I have a softphone "xlite" installed on one of the systems that is connected to this firewall, I can receive calls on that soft phone anytime I call it. Do you know why is that happening?

Thanks

Surya.