DHCP/IP Setup for SMC (Comcast Biz) & Wireless Router

[Dulanic]

I am having a little trouble in setting up with my new comcast business SMC device as it has it's own built in DHCP server and switch which makes the setup different than my old cable modem. OK the SMC is setup like so:

It is set as 10.1.10.1 as you can see. From what I can find online I should set the router up as 10.1.10.2 but I am having trouble. I tried this...

Now this works but it causes some routing issues etc... so my understanding is I should just use the SMC as my DHCP server. However, when I set my router like so:

My PC no longer gets assigned a IP address, If I update the router UP to 10.1.10.2 it still will not provide a DHCP address... where and what am I doing wrong? Basically, the goal is to have all PCs go through the router, yet I guess get assigned the IP address via the SMC device? I'm not really sure. I am 90% sure I am right in setting the router to 10.1.10.2 and setting that as DMZ on the SMC device.

 

[Lifted]

You probably want to place the Comcast router into bridge mode (it will behave like a typical modem) so the tomato device gets a public IP and you don't have NATing and filtering occurring on both devices.

 

[Ghiedo27]

One thing that has always annoyed me about Business Class is that Comcast provides an SMC “gateway” device that essentially forces double-NAT, even if you just want a modem. There is no true bridge mode with the SMC device.

The OP's SMC might be similarly "featured". I'd attempt connectivity between just the PC plugged into one of the smc's lan ports (with dhcp on, obviously). I think that's your best bet with a combo device. If you need the other router to provide wireless, look into setting it up as a wireless AP. handy guide

 

[Dulanic]

You probably want to place the Comcast router into bridge mode (it will behave like a typical modem) so the tomato device gets a public IP and you don't have NATing and filtering occurring on both devices.

Not an option

 

[imagoon]

Not an option

Yes it is. Call TAC. They will switch it over for you. They are 24/7 for your business pleasure. They only give you the "Fisher Price" level of access to the modem.

 

[Dulanic]

The OP's SMC might be similarly "featured". I'd attempt connectivity between just the PC plugged into one of the smc's lan ports (with dhcp on, obviously). I think that's your best bet with a combo device. If you need the other router to provide wireless, look into setting it up as a wireless AP. handy guide

Not an option, need more abilities /w QoS port fowarding etc from the router that the comcast business SMC device doesn't offer. I've read online that I should be able to just kind of pass off the DHCP to the SMC device and turn off DHCP on the router, but I just can't get that working.

 

[Dulanic]

Yes it is. Call TAC. They will switch it over for you. They are 24/7 for your business pleasure. They only give you the "Fisher Price" level of access to the modem.

Will give them a call.

 

[Dulanic]

Yes it is. Call TAC. They will switch it over for you. They are 24/7 for your business pleasure. They only give you the "Fisher Price" level of access to the modem.

Just called, not an option since I don't have a static IP.

 

[imagoon]

Just called, not an option since I don't have a static IP.

Then they changed it. Or they didn't want to do it for some reason. Honestly I would consider calling again and getting a different tech. When I was with them the end result seemed to vary a lot based on who answered. Granted I finally bought a static IP because the modems seemed to die every 3 months and getting the config reset up each time became a pain.

 

[Dulanic]

Then they changed it. Or they didn't want to do it for some reason. Honestly I would consider calling again and getting a different tech. When I was with them the end result seemed to vary a lot based on who answered. Granted I finally bought a static IP because the modems seemed to die every 3 months and getting the config reset up each time became a pain.

Odd, when I called he said yeah no problem then came back and said when he tried to change it, it rejected it without a static IP.

With how it is, I can somewhat get things running but fowarding etc.. just doesn't like this. I can put the router in the SMC DMZ and the router port foward, but it won't work that way for it for some reason.

 

[imagoon]

Odd, when I called he said yeah no problem then came back and said when he tried to change it, it rejected it without a static IP.

With how it is, I can somewhat get things running but fowarding etc.. just doesn't like this. I can put the router in the SMC DMZ and the router port foward, but it won't work that way for it for some reason.

You will also get double NAT issues running it that way.

 

[Lifted]

I'm beginning to understand how 'comcrap' came about.

 

[Dulanic]

It took cancellation threats (I'm within my 30 days) but they let me use my old residental modem so I am good now.