Comcast Business Support Community

Newbie guide to Copper business static IPv4/IPv6 offerings from Comcast

NOTE THAT DYNAMIC IPv4 MEANS DYNAMIC IPv6!!!!!!! A REBOOT OF THE MODEM DOES NOT GUARANTEE YOU WILL COME BACK WITH THE SAME IPv4 OR IPv6!!!!!! THIS POST IS ABOUT STATIC IPv6!!! NOTE THAT TECHNICOLOR BOUGHT CISCO CABLE MODEMS IN 2015Technicolor's manuals for former Cisco cable modems are here

@jb_geek I don't know anything about ip6 to ip4 translations and the link you provided doesn't seem to work. Comcast also assignes a /56 to my cable modem. The cable modem hands out /64's to my router. The interface from the router to

Newbie guide to Copper business static IPv4/IPv6 offerings from Comcast

NOTE THAT DYNAMIC IPv4 MEANS DYNAMIC IPv6!!!!!!! A REBOOT OF THE MODEM DOES NOT GUARANTEE YOU WILL COME BACK WITH THE SAME IPv4 OR IPv6!!!!!! THIS POST IS ABOUT STATIC IPv6!!! NOTE THAT TECHNICOLOR BOUGHT CISCO CABLE MODEMS IN 2015Technicolor's manuals for former Cisco cable modems are here

Hi @jb_geek , I just received a CGA4131COM on Tuesday. At first it would not issue a PD. Not sure what changed, but it is now handing me /64 addresses for the two subnets I have setup. I've rebooted it a couple of times and so far the PD's h

Newbie guide to Copper business static IPv4/IPv6 offerings from Comcast

NOTE THAT DYNAMIC IPv4 MEANS DYNAMIC IPv6!!!!!!! A REBOOT OF THE MODEM DOES NOT GUARANTEE YOU WILL COME BACK WITH THE SAME IPv4 OR IPv6!!!!!! THIS POST IS ABOUT STATIC IPv6!!! NOTE THAT TECHNICOLOR BOUGHT CISCO CABLE MODEMS IN 2015Technicolor's manuals for former Cisco cable modems are here

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/59 prefix delegation block changed...

I have a /56 static on Comcast Business. Recently I had a cable modem issue (as determiend by comcast) and the cable modem was replaced. Everything is working, but I received a different /59 (still inside my /56) so I had to renumber several vlans! How do I keep this from changing

@rob__jr yea...I thought I had found a solution, but alas, it was my hot spot connection to my phone that was getting the good results (Iphone is using ipv6). They aren't going to fix it, and they really don't care...so I've reverted my network bac

Questions about Comcast Business Delegated Prefixes

It's my understanding that DHCP-PD is only responsible for doling out IPv6 prefixes to routers which ask for them, and generally does nothing about the routing of those prefixes, leaving the routing up to the implementer.I'm wondering how Comcast implements the routing side? Is there a standard set

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Technicolor/Cisco DPC3939 IPv6 ceases to route and Prefix Delegation changes

Hello, The following post describes exactly what I am experiencing with my DPC3939. https://forums.businesshelp.comcast.com/conversations/ipv6/newbie-guide-to-copper-business-static-ipv4ipv6-offerings-from-comcast/6084833f43a1b761d4e7f0e6 Specifically: "DHCPv6-PD works immediately after reboot t

This is a very good thread on this topic. https://forums.businesshelp.comcast.com/conversations/ipv6/questions-about-comcast-business-delegated-prefixes/60311b7bc5375f08cdab2ddc?commentId=60879de86346df7a82b7cfd6

Technicolor/Cisco DPC3939 IPv6 ceases to route and Prefix Delegation changes

Hello, The following post describes exactly what I am experiencing with my DPC3939. https://forums.businesshelp.comcast.com/conversations/ipv6/newbie-guide-to-copper-business-static-ipv4ipv6-offerings-from-comcast/6084833f43a1b761d4e7f0e6 Specifically: "DHCPv6-PD works immediately after reboot t

Another very knowledgeable user has discovered that the Netgear CG3000CR is really the way to go. It is older, but it it's IPv6 PD is more solid than any of the other CPE's you guys have. How can I get a Netgear CG3000CR? It looks like the AR

I use a Netgear CG3000CR myself on a business line with statics. Yesterday at 11 am the modem started flopping the circuit up and down. I called Comcast and finally got them to dispatch a tech who came out and said he's seen this before

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"thank you for taking the time to reach out in our forum and help further our awesome community. I'd be happy to help see if we can avoid you reaching out and spending hours updating reverse address IPv6 entries. In order to get started can you pleas

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Nobody has called me and told me my speeds have been discontinued. Years ago they did do a speed change and I upgraded to a slightly faster speed but nobody said anything about replacing the cable modem. The Netgears are good for roughly up to

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