Is it possible to bypass the 2nd router?

[pmterp]

My network setup: Comcast SMC gateway (10.1.10.1) > Netgear 3500L (192.168.1.1)(or any 2nd router/firewall) > My Laptop. Comcast gateway has a DHCP pool of 10.1.10.2-.100. Shouldn't it be possible to assign my laptop an IP from the Comcast device (outside the pool), change my default gateway to 10.1.10.1, change my DNS to the one Comcast gives out and get online? I thought I had done this before but I can't seem to get it to work.

 

[RealBeast]

Yes, you should be able to make the laptop static in the Comcast router (you'll need the laptop MAC address to enter in the router) outside the DHCP assignment range as you say, assign your laptop the same static address as in the router and the 10.1.10.1 gateway. You shouldn't need to set a DNS as it should get it from the gateway, but you can manually set it to the Comcast DNS.

HERE is a picture of what you are doing and the laptop is on the "front" network.

 

[pmterp]

Yes, you should be able to make the laptop static in the Comcast router (you'll need the laptop MAC address to enter in the router) outside the DHCP assignment range as you say, assign your laptop the same static address as in the router and the 10.1.10.1 gateway. You shouldn't need to set a DNS as it should get it from the gateway, but you can manually set it to the Comcast DNS.

HERE is a picture of what you are doing and the laptop is on the "front" network.

Just to be sure I understand, that would be like what some routers call "reserving" the IP address for my laptop's mac, right? If so, unfortunately, the Comcast gateway does not offer that option, just DCHP without a place to reserve. There is a tab for static routing that asks for name, destination ip, subnet mask, and gateway; but I don't think that's what I'm looking for.

 

[RealBeast]

No, I just assumed that the Comcast gateway does NOT support address reservation in the DHCP function, which would allow an address within the DHCP range to be used. I meant a static address that would be entered for a LAN device NOT for the Internet provider (WAN), which is what I think that you are describing. Every router that I've come across for many years allows you to set a static address for LAN devices.

What model is the SMC Comcast gateway? Your manual should have something on using static addresses for LAN devices.

 

[pmterp]

What model is the SMC Comcast gateway? Your manual should have something on using static addresses for LAN devices.

It's the standard SMCD3G. Not much on the LAN page but your right, it should allow for assigning LAN statics. There is the Static Routing tab but I still don't think that's what I'm looking for. I've attached a screen shot. I'll look at it more on Monday. Thank you for the help.

 

[bill001g]

This will not work if your netgear is running as a router which the different subnet implies. You need to set this to AP mode or cable to the lan ports and disable dhcp and change the IP of the second router if you want to manage it without changing you pc ip all the time.

 

[pmterp]

Ok, why not this? Comcast Modem (port 1) > Netgear Router > Switch > End points AND Comcast Modem (port 2) > Switch Endpoints
Disable DHCP in my Comcast device and manually configure IP's for any devices I need to route straight through it. Other devices still get IP's from Netgear router and run traffic through it.
Example: Laptop still configured for auto IP plug it in to the switch and it get's 192.168.1.2 gateway 192.168.1.1. Plug IP phone into the switch with IP munally configured as 10.1.10.5 gateway 10.1.10.1.
Any reason this wouldn't work?

 

[bill001g]

It will work but it is a extremely non standard thing to do. You now have overlapped 2 networks broadcast areas. Hard to say if it will cause issues.

Why can you not just plug the ip phone directly into the comcast modem instead of plugging it into the second switch.

When you do this your second router really has no purpose you could put all the devices in the top network off the comcast device.

 

[pmterp]

It will work but it is a extremely non standard thing to do. You now have overlapped 2 networks broadcast areas. Hard to say if it will cause issues.

Why can you not just plug the ip phone directly into the comcast modem instead of plugging it into the second switch.

When you do this your second router really has no purpose you could put all the devices in the top network off the comcast device.

Very non standard, that makes me nervous but it seems logical enough to work. The reason I can't go straight to the modem is I tether the Laptop to the phone. The phone works as a passive switch so that there is only one CAT5 run from the network area to my desk.