DavidDude's profile

New Poster

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1 Message

Sat, Sep 21, 2019 9:00 AM

How do I reserve an IP address in xfi

How do I reserve an IP address for my printer in xfi?

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Accepted Solution

ComcastBrittany

Official Employee

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712 Messages

2 y ago

Hi @DavidDude, there is no way to set static or reserved IPs in xFi. In some markets, static IP addresses are available for purchase. 

 

Can I ask why you are trying to do this? Perhaps I could help provide some additional guidance. 

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New Poster

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2 Messages

1 y ago

I have the same need.  I want to reserve an IP address for specific device on my home network so that when I access it from the Internet (port forwarding) I always have the same address.

New Poster

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3 Messages

1 y ago

While for some dumb reason the xfinity routers do not let you create reserved IP addresses (like every other router), as a workaround you can change the DHCP start/end IPs to allow you to manually set IPs outside of that range.

 

 

I use the first 10 IPs for this purpose:

  • DHCP Start Range: 10.0.0.11
  • DHCP End Range:   10.0.0.253

New Poster

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1 Message

1 y ago

Assigning static IPs is necessary for many 'smart' items to keep them in network.  For example, many smart locks - and most recently experienced broadly (See one example here) will lose connection with their gateway when the gateway (nest connect, smart hub, etc) is dynamically assigned wifi IPs.

 

A simple way to resolve that connect/reconnect issue is by assigning the gateway a static IP.

 

Can Comcast tell us why assigning a static IP is not possible? Is this to intentionally make it more difficult to use non Comcast smart devices?

Contributor

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30 Messages

1 y ago


@JMichaelTX wrote:

While for some dumb reason the xfinity routers do not let you create reserved IP addresses (like every other router), as a workaround you can change the DHCP start/end IPs to allow you to manually set IPs outside of that range.

 

 

I use the first 10 IPs for this purpose:

  • DHCP Start Range: 10.0.0.11
  • DHCP End Range:   10.0.0.253

 

 

WHen I try to do that I get an error message saying the assigned IP must be INSIDE the specified range and when it is I am unable to assign an IP of my choice.  I'm using the Xfinity Gateway

Model: CGM4140COM

Visitor

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1 Message

10 d ago

help! i also want to do this for a minecraft server :(

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