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Forum Discussion
Solved
CM1100 IPv6 Problem (Xfinity)
Hi everyone,
I replaced our C7100V with a new CM1100 yesterday. After a bit of wrangling on the phone with Comcast, it's activated and working... but only on IPv4. Firmware version after the Comcas...
CM is just a bridge modem. It is not do anything for CPE side (LAN side) Ipv6 other than just mere forwarding it.
Comcast does DHCPv6 for the routers and provides a delegated Prefix (PD) along with it.
Not sure what firewall you are using, but most linux ones support DHCPv6 with PD.
Update 2: Let's mark this as "solved," since the CM1100 is indeed pulling an IPv6 address. I'll continue working the issue with Untangle, since it's likely related to an issue with DHCPv6 / Native IPv6 / stateless / PD / RA, or a block of ICMPv6 traffic.
Thanks!
One final question about the CM1100 - will there ever be an ADVANCED > Advanced Setup > IPv6 settings page for the CM1100, like with other Nighthawk products?
Thanks!