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Two routers

Regular Visitor

Two routers

How do we use two routers with one modem? We want a second, separate router in a detached garage/ADU building, 50 feet from our house. It is connected by ethernet cable through 2 D-Link switches to our modem. We have a Surfboard 6183 modem, a Netgear router in use in our home, and a Linksys router I'd like to add. I believe this requires two IP addresses, since we don't want to have a bridge/relay/extender set up. We'd like two separate main routers.

 

Thanks for any info.

Official Employee

Re: Two routers

Hello, Pleasehelpme3! Thank you for posting in our community! We don't recommend to use two routers and we can't really help with the setup. Are you having issues with the WiFi coverage? 


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Frequent Visitor

Re: Two routers

What it sounds like you need is something like an access point.  You can try something like a ubiquiti unifi ap.

Regular Visitor

Re: Two routers

How do I "post publicly"? Thanks for any info.

Regular Visitor

Re: Two routers

Also - I don't quite understand how your forum works, but I am asking since I found this post in the forum - 

 

DickyDck
Frequent Visitor
Getting a second IP address for my SB8200 Modem

Hello, I've found SEVERAL other forums from people who have had the same issue I am facing. I want to get a Second IP address for my ARRIS SB8200 modem!!!! as of 09/10/2018 4:29pm Eastern Standard time I am presently still on the phone while typing this post up trying to find someone who can help me. I am on call with a Supervisor named Kelly from Level 2 Support, who initially told me this couldn't be done on my self-purchased modem, and then listed off a bunch of DOCSIS 3.0 Comcast provided modems that could. Well anyone with some networking background knows this is untrue, so far the only DOCSIS 3.1 modem I have found is the SB8200 with 2 Ethernet ports on the back that can be assigned 2 IP addresses. So I'm hoping someone from Comcast will reply and reach out to me here.

 

Yes

It is on my list of available services.

Checked here...

https://comcaststore.s3.amazonaws.com/prod/wk/urc/585bc84a5bcd10375b2cfa56/high_res/UN0000028_sik_hi...

 

I have gigabit "Blast" package service which is 1000dl/35ul.

 

PLEASE someone from Comcast reply and help me, I'm not even joking, I'm STILL on the phone and have been for about an hour, and "Kelly" is still on hold trying to get someone from tech support, which if they are truly technical they will know what I am asking for is possible, especially since there are at least 5 other threads here from people claiming to have had it done.

Expert

Re: Two routers


@Pleasehelpme3 wrote:

How do I "post publicly"? Thanks for any info.


Are you talking about posting a pic / pics ?



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
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Regular Visitor

Re: Two routers

Not particularly, I'm just trying to learn my way around and get an answer. One reply asked that I "post publicly". What does that mean, and how do I do it? I cannot find any such reference in the help topics.

 

Thanks for any info.

 

PS, as to my original request, it doesn't seem impossible, and I'm looking for the answer to longer reference post I included, which had a reply in a private message, rather than a public post. I'm confused.

Official Employee

Re: Two routers

@Pleasehelpme3 - You already posted publicly by creating this thread. If you would like to purchase a second IP address - I can check if we offer this feature in your area. We offer the second IP in some areas but we can't assist with setting up your personal equipment (except modem). I see that you already sent us a private message and I will reply back in a second. Thank you!


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Official Employees are from multiple teams within Comcast: CARE, Product, Leadership. We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
Regular Visitor

Re: Two routers

How do I reply to a private message? This is so confusing. I just want Wifi in a detached building and now I'm lost in these forums.  Thanks for any info.


@ComcastElla wrote:

@Pleasehelpme3 - You already posted publicly by creating this thread. If you would like to purchase a second IP address - I can check if we offer this feature in your area. We offer the second IP in some areas but we can't assist with setting up your personal equipment (except modem). I see that you already sent us a private message and I will reply back in a second. Thank you!


 

Frequent Visitor

Re: Two routers

Read my first post.  YOU DON'T NEED A SECOND IP ADDRESS IF ALL YOU WANT IS WIFI IN ANOTHER AREA.  There's no point in purchasing a second IP or racking your mind with trying to figure that out.  ALL YOU NEED IS AN ACCESS POINT  Something like this

Regular Visitor

Re: Two routers

Thanks - but what did Dickydck do in the post I referenced above? I'm just trying to figure out how all this works.

Highlighted
Expert

Re: Two routers


@Pleasehelpme3 wrote:

Thanks - but what did Dickydck do in the post I referenced above? I'm just trying to figure out how all this works.


SInce I was involved in that thread- 

 

Each modem on a consumer account is typically assigned one public IP (IPv4) address.. What that particular user wanted was to have a second one for their modem so that they can run a separate public connection to the internet with a separate IP address from the same modem. 

 

Since you stated that you wanted a separate WIFI connection on a separate router, presumably with a separate IPv4 address to a detached building as stated here:

 


@Pleasehelpme3 wrote:

How do we use two routers with one modem? We want a second, separate router in a detached garage/ADU building, 50 feet from our house. It is connected by ethernet cable through 2 D-Link switches to our modem. We have a Surfboard 6183 modem, a Netgear router in use in our home, and a Linksys router I'd like to add. I believe this requires two IP addresses, since we don't want to have a bridge/relay/extender set up. We'd like two separate main routers.


...you will need to:

 

  1. Go to https://www.xfinity.com/support/rate-card (requires XFINITY account logon) and check if the option for having an additional IPv4 address is available in your area. The option will be listed under "XFINITY Internet" on the last page. If the option is available, go to step 2. If it is not available, then you will not be able to get one. 
  2. Upgrade your SB6183 modem to one that has two or more ethernet ports to allow for configuration of a separate IP address into a separate router. (E.G. ARRIS SB8200,  Netgear CM1100, Motorola MB8600. 
  3. Post back here and your request will be elevated to a Comcast Specialist for processing. 

 

Note Comcast allows only one modem or gateway per consumer account.


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We ask that you post publicly so people with similar questions may benefit from the conversation.
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Expert

Re: Two routers


@darkangelic wrote:

  1. Upgrade your SB6183 modem to one that has two or more ethernet ports to allow for configuration of a separate IP address into a separate router. (E.G. ARRIS SB8200,  Netgear CM1100, Motorola MB8600. .

FWIW, can't an ethernet switch be used with any single port cable modem for port expansion purposes (with an additional public IP addy of course)  ?



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I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
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