Vonage vs IP TV, can't have both?

Posts: 328 · Vonage Forum Evangelist Joined: Dec 13, 2005 Posts: 328

With the speed that you have, I could see having voice quality troubles, but I would still expect the phones to register. As far as subnets go - does the cable modem itself include a router?

Posts: 7 · New Forum Member Joined: Nov 14, 2006 Posts: 7

howiewifi wrote:

With the speed that you have, I could see having voice quality troubles, but I would still expect the phones to register. As far as subnets go - does the cable modem itself include a router?

That's a good question. I will have to dig around the modem to see what it does. Any suggestions for what to look at?

Posts: 328 · Vonage Forum Evangelist Joined: Dec 13, 2005 Posts: 328

I would suggest pluggin a PC directly into the modem with the router off or disconnected, then ping 192.168.1.1 or just try it in your browser. If you get anything other than "can't find" or "no response", then I would recommend changing the router that you control.

Posts: 1 · New Forum Member Joined: Nov 15, 2006 Posts: 1

Two more things to check:
1. Log in to the Vonage box, and if your Vonage box has Local DHCP enabled, disable it.
2. Log in to your router and if your router has Local DHCP enabled, disable it.

You are using static IP addresses so disabling the automatic assignment of IP addresses locally (behind your router) should have no effect.

If there is still a conflict, change your router to 192.168.2.### where ### is the number you've already assigned to the router. Also change the static IP addresses for the computers in the same way AND change the gateway address if entered so they point to the changed address of your router. You would then have two subnets that shouldn't conflict.

You can always change them back to previous settings. To make less work of it, you can test with just one computer and then change the others if the new settings work.

Posts: 7 · New Forum Member Joined: Nov 14, 2006 Posts: 7

I changed my network to 192.168.6.xxx, hoping that it's not colliding with an existing network, the problem still persists.

Fired up Ethereal, turned on my IPTV first, then the Vonage VTA, sniffed it, and found bunch of ARP requests from the VTA asking who knows my router's address.

Reverse the order, turn on VTA first then IPTV, this time no ARP request but IPTV is down. Interestingly, I found an ARP packet from my desktop requesting for the router's address and the Vonage VTA actually responded on behalf of the router!

Now it got me thinking - shouldn't the router reply an ARP request normally? Could it be something wrong with my router?

Went to Linksys' web site, downloaded latest firmware and upgraded it. Viola! Everything starts working like a charm!

I still can't explain why the order of starting the devices matter before the firmware upgrade. I found a couple of ARP related bugs in the new firmware's release note but none indicates the router may fail to respond to an ARP request.

Anyway, thanks for all the help. Much appreciated!