SIP registrations

[teletechman]

I have a customer that is experiencing call drops on their SIP trunks, we have checked all the switches and firewall settings to make sure that there is not routing issues. What I have seen is that the SIP will re-register to the providers backup server and send a "bye" message when this happens. It seems that the IP Office get the main server sometimes and at other times get the back up. I have been told the following by the provider.
The srv lookups are weighted. When you try to register and do a SRV look up to port 0 it will return to you the 192.58.90.20 ip unless it is unavailable for some reason. If unavailable it will give you 192.58.91.20. If you do a standard DNS lookup if will 50% of the time 192.58.90.20 and the rest 192.58.91.20.
They say it is an issue with the way the IP Office looks up the SRV record for the FQDN. I say this is bull as other customers to the same provider have not complained with the same IP Office settings. Anyone else see anything like this before.
Thank you Mike

 

[fieldtechonIR]

For this sip trunk are you using ip authentication or username and password? what is the sip provider?

 

[teletechman]

Provider is New Horizon and we are using username and password to authenticate.

 

[amriddle01]

Use IP not URL....

 

[teletechman]

The reason for the URL is for the fail over feature. I will work if we set it to the IP but the salesperson and the customer like to the idea of the failover.
I hate salespeople.
Mike

 

[holdmusic34]

^

Found: Grouchy smurf. Good condition. Slightly grouchy.

Nobody cares how you wear your hair, darling. Just keep doing it.

 

[fieldtechonIR]

It sound like your IP in not in the SBC for the failover. Since your using user and password I would think you wouldn't have this issue. Unfortunately every sip provider does things a little different so maybe they need your IP as well. Did they ask what IP you were coming from?

 

[teletechman]

Hi all rehashing this as I have another SIP customer using New Horizons SIP that is going to unregistered because the provider said we are not looking up the DNS records correctly. They are telling us that we need to use SRV records lookup for the SIP to work correctly. I have looked at the programming but can find no way to use this setting.
Is this something that the DNS provider should be using as I am pulling records from them. The provider says we have to use the SRV records as they are weighted. Not sure how to do this in the IPO. We are using the customers server for DNS.
Thanks Mike