Welcome to Xfinity Help & Support Forums
Find solutions, share knowledge, and get answers from customers and experts

New to the Community? Start here.

5,845,038

members

671

online

36,678

topics

Top

Assigning a second IP address to an Arris SB8200

ANSWERED
New Poster

Assigning a second IP address to an Arris SB8200

After spending 3 hours speaking to 12 scripted reps, I am trying my hand here for someone who can help me out.

 

I have an Arris SURFboard SB8200 cable modem. I would like to be able to make use of both ports, so one of the ports can be used as a direct line, and the other fed to a router. My understanding is that this requires a second IP address to be assigned to the modem. I would appreciate if a Comcast rep could tell me:

 

A: Whether this is possible under a residential plan in my area.

&

B: How much this would cost.

 

Thanks.

Accepted Solution

Re: Assigning a second IP address to an Arris SB8200

I dont believe anyone is allowed to use the other ports on modems like the SB8200 and MB8600 currently allowed unless if having another IP.

 

Look at this link and see if an additional IP is available for your area.

https://www.xfinity.com/support/rate-card/

 

Another link for reference:

http://forums.xfinity.com/t5/Your-Home-Network/SB8200-Ports/td-p/2915827

View answer in context
Cable Expert

Re: Assigning a second IP address to an Arris SB8200

If a second residential IP is available (it's not in many areas), it's about $7/month.  But I don't think that's what you really need. Aren't both ethernet ports already active? Why wouldn't you just plug into the router?




Community Icon
I am not a Comcast employee, I am a paying customer just like you!
I am an XFINITY Forum Expert and I am here to help. For information on the program click here.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark a Best Answer!solution Icon
Community Icon
I am not a Comcast employee. I am a paying customer just like you!
I am an XFINITY Forum Expert and I am here to help.
We ask that you post publicly so people with similar questions may benefit.
Was your question answered? Mark a Best Answer!solution Icon
Community Icon
I am not a Comcast employee.

Was your question answered?
Mark an Answer!solution Icon

Highlighted
Problem Solver

Re: Assigning a second IP address to an Arris SB8200

I dont believe anyone is allowed to use the other ports on modems like the SB8200 and MB8600 currently allowed unless if having another IP.

 

Look at this link and see if an additional IP is available for your area.

https://www.xfinity.com/support/rate-card/

 

Another link for reference:

http://forums.xfinity.com/t5/Your-Home-Network/SB8200-Ports/td-p/2915827

New Poster

Re: Assigning a second IP address to an Arris SB8200

@nerdburg

 

It is indeed what I need. Only one port is usable at a time without a second IP address, according to Arris' own documentation.

 

I need a direct line from the modem concurrently active with a line to the router, for diagnostic purposes.

New Poster

Re: Assigning a second IP address to an Arris SB8200

@jweaver

 

Thanks for the links, this is exactly what I needed!

Problem Solver

Re: Assigning a second IP address to an Arris SB8200

Just wanted to say if the only diagnostic use you are going to use it for is signal stats if you had a problem you dont need to get a second ip. For example, if youre internet is slow behind your router (192.168.1.1) and you wanted to check the modem stats, you can go to 192.168.100.1 right from any connected device.

Forums Tips and Tricks:
Tagging Posts... See More
Discussion stats
  • 5 replies
  • 279 views
  • 0 kudos
  • 3 in conversation