Visitor
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1 Message
Additional IP on a residential connection
Hello, I have a Comcast residential connection and I reached out to multiple support staff. I need a secondary ip address For a second router that I need to run behind my modem. The second router cannot be added, and I can’t use VPN due to what I’ll be running on it and latency
From what I understand the option to add an IP address has been removed a while ago, but if you reach out to the white people you still can add it.
One technician said that he did it and it’ll take time for it to propagate, but I don’t think he did And I never got billed for it.
This board is my last hope
edit: I have contacted support multiple times and a couple people said that they can do it and they’re escalating it to layer two in which I never heard back.
XfinityChelseaB
Official Employee
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2.1K Messages
9 hours ago
Hello @user_6jypfa, Thanks so much for taking a moment out of your day to leave a post on our community forum and we would be happy to help. This is not something we can help with but have you looked at our business services to see if that will fit your needs more?
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zandor60657
Contributor
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223 Messages
5 hours ago
What do you need the additional address for? Is IPV6 good enough? I don't think you can get additional IPV4 addresses on residential service, but if IPV6 is good enough you can hint for a /60 and get 16 subnets on a residential connection. I've been asking for a /61, so 8 IPV6 subnets, and getting it for years. I could probably get a /60, but I just don't need 16 subnets so I didn't ask for it. You'll need a router that supports that, so commercial/business class equipment. Also that's only IPV6. I still only have one IPV4 address. IPV4 uses 32-bit addresses, so there are a total of 2^32 addresses for the entire world. So a little over 4 billion and there are more people than that. IPV6 uses 128-bit addresses, but the minimum subnet size is half that, so there are 2^64 subnets. So 4 billion times 4 billion. It's a lot, and the spec says residential IPV6 service is supposed to get multiple subnets. As best I can tell Comcast implements the IPV6 spec correctly, but you can't take full advantage of it with a rented modem or any consumer device you can get at a big box store.
If you need a second IPV4 IP address I'm sure they can do it, but I'd expect you'll have to pay for a business class connection.
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