C7800 to be used as router while Comcast XB6 used as Gateway

[magic9669]

Not sure if this is the right place so if someone could let me know otherwise, i'd appreciate it.  I have a c7800 and I need to keep my Comcast XB6 online.  I wanted to put it in bridge mode and then use my c7800 as the router, but when I connect the netgear to the xb6, nothing works.  

Has anyone gotten this to work by chance?

[antinode]

> [...] I wanted to put it in bridge mode [...]

By "it", you mean the XB6?

> [...] when I connect the netgear to the xb6, nothing works.

   How, exactly, did you "connect the netgear to the xb6"? What,
exactly, did you connect to what, exactly?

> Has anyone gotten this to work by chance?

   I'd guess not "by chance" or by any other means.

   If a C7800 had a WAN/Internet Ethernet port, then you might have a
chance.  Visit http://netgear.com/support , put in your model number,
and look for Documentation.  Get the User Manual.  Look for "Rear
Panel".  Do _you_ see a WAN/Internet Ethernet port?  Do you see anything
in that manual about connecting a C7800 to any other modem(+router)?