ER-3 -Comcast Fiber

[mroth911]

OK just so I am following correctly.. eth0 is my wan..

layer3 ip///

and the eth1 is

my usable lan?

[JaredBusch]

@mroth911 said in ER-3 -Comcast Fiber:

OK just so I am following correctly.. eth0 is my wan..

layer3 ip///

and the eth1 is

my usable lan?

Define what you mean by Layer 3 IP, as you have it on a line by itself there so I have no idea what you are referencing.

But yes, your WAN is eth0, LAN is eth1. If you expand the view on LAN there you can setup the IP and subnet to match your existing LAN networking.

[mroth911]

I HAVE WAN BLOCK....
LINK IP ADDRESS. X.X.X.240/30
LAYER 3 IP X.X.X.242
LAYER 3 SUBNET X.X.X 252

THEN I HAVE LAN BLOCK
USABLE IP BLOCK X.X.X.X./27
USABBLE RANGE X.X.X.X-X.X.X.X.
USABLE SUBMET MASK X.X.X.224

IF I CONFIGURE ETH0 AS WAN HOW DO I GET BACK INTO THE ROUTER , I WANT TO HAVE DHCP ON ETH1 10.0.0.1

[JaredBusch]

Also, I think I see what you mean about bridging. It is in the basic wizard.

Do not do it.

Ever.

[mroth911]

then how do i get dhcp on eth1 and get back into the router?

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

then how do i get dhcp on eth1 and get back into the router?

It should go there directly. not sure what you mean by "back in". DHCP isn't needed to access anything.

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

OK just so I am following correctly.. eth0 is my wan..

layer3 ip///

and the eth1 is

my usable lan?

If set by the wizard that way, yes.

[mroth911]

ok so eth1.. that has the 192.168.1 .. what do i put there>

[JaredBusch]

@mroth911 said in ER-3 -Comcast Fiber:

then how do i get dhcp on eth1 and get back into the router?

Is your entire LAN a public network? If not your LAN is a private range that you setup.

[JaredBusch]

@scottalanmiller said in ER-3 -Comcast Fiber:

@mroth911 said in ER-3 -Comcast Fiber:

then how do i get dhcp on eth1 and get back into the router?

It should go there directly. not sure what you mean by "back in". DHCP isn't needed to access anything.

@scottalanmiller He has his own public IP block. noted as LAN from Comcast.

[mroth911]

I have my own public block..

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

THEN I HAVE LAN BLOCK
USABLE IP BLOCK X.X.X.X./27
USABBLE RANGE X.X.X.X-X.X.X.X.
USABLE SUBMET MASK X.X.X.224

Why do you have a LAN block? What is its purpose?

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

I have my own public block..

But why? Is there a purpose to it? You could just not use it.

[mroth911]

IDK!

[scottalanmiller]

@mroth911 said in ER-3 -Comcast Fiber:

IDK!

Then ignore it and set up as usual. you only want that if you REALLY know why, otherwise, ignore it.

[mroth911]

https://business.comcast.com/help-and-support/ethernet/comcast-business-ethernet-equipment-configuration/

[mroth911]

Thats what i was given from tech support

[JaredBusch]

Ok, I just reread some of your posts here. Let me make you a screenshot.

[mroth911]

ok thank you so much!

[JaredBusch]

Basic Wizard

I always expand the secondary LAN, give it a non-default IP, a /24, and disable the DHCP on it. No reason to use resources.

You can just ignore the LAN block from Comcast.