time capsule and xfinity

The Time Capsule is currently set up in Bridge Mode. It is not acting as a router. The "DHCP" that you see under Internet has no bearing on whether the Time Capsule is set up as a router or it is set up in Bridge Mode.

Chances are, the Time Capsule has been set up in Bridge Mode all along, and you were not really aware of this.

Apple does not make it easy, but "Off (Bridge Mode)" is exactly the same thing as Bridge Mode.

Is this clear to you now?

If the Time Capsule were set up as a router........the Network Mode setting would look like this:

You would also see a Double NAT message if the Time Capsule were set up as a router.

Switch your Time Capsule Wi-Fi network off, and wire it to your Ethernet network.

The Time Capsule will operate as a NAS.

If nobody connects to the old Wi-Fi name, there are no clients to receive the double-NAT that’s latent here.

Another option is to switch the Time Capsule and the XFinity box to access points, but that’s more work, and usually more to configure as you’ll get familiar with DHCP and other details.

My time capsule appears to also be acting as a router (its not in bridge mode) I know this because the previous network name when the time capsule was the router is still up and running. My question is- is there a problem with this

The fact that the Time Capsule might still be producing a Wi-Fi signal does not necessarily mean that it is acting as a router, although it is possible that it might be.

A lot of users do not understand that the Time Capsule can still produce a Wi-Fi network signal when it is in Bridge Mode.

Have you checked the Network settings in AirPort Utility to verify whether the Time Capsule is set up as a DHCP and NAT router.....or.....whether it is set up in Bridge Mode, which Apple calls "Off (Bridge Mode)".

Do you want to back up using the Xfinity Wi-Fi network.....or.....the Time Capsule Wi-Fi network? If you want to back up using the Xfinity network, then you should turn off the Wi-Fi function on the Time Capsule so that it will act only as a wired hard drive attached to your Xfinity router.

You would also need to have the Time Capsule in Bridge Mode for this type of setup.

I'm not getting a double nat message...

Normally, you would see a Double NAT message if the Time Capsule is set up as a DHCP and NAT router with another router also on the network......unless......you previously chose to "ignore" the Double NAT as an option.

Offhand, I can't think of any good reason to have a Double NAT setup on a network if it can be avoided.....unless you are trying for some kind of special setup to isolate one network from the other.

I had it on DHCP and bridge mode is off.

Sounds like we need to double check some settings, because is is easy to be confused.

Open AirPort Utility

Select the Network tab

Is the setting for Network Mode........DHCP and NAT......or is it "Off (Bridge Mode)".

If it is DHCP and NAT......the Time Capsule is set up as a router.

If it is Off (Bridge Mode).....the Time Capsule is not set up as a router......it is set up in Bridge Mode and the DHCP and NAT normal router settings are "Off".

Another way to say the same thing......the routing functions of the Time Capsule are turned "Off"......so the Time Capsule is in Bridge Mode.

Apple would make it lot easier if they would simply use the term Bridge Mode......not Off (Bridge Mode)......because Off (Bridge Mode) is exactly the same thing as Bridge Mode.

It might be easier for you to simply ignore the "Off" and make believe that it is not there.

Once you are clear on exactly how the Time Capsule is currently set up, we'll tackle the other questions.

Nice work!