US Cable Support → Comcast HSI > [IPv6] Evidence of Comcast IPv6 CPE Dual Stack (CPE and CPEPD)

Re: [IPv6] Evidence of Comcast IPv6 CPE Dual Stack (CPE and CPEP

Chicago, IL
OpenBSD router, SB6120 modem

Holland, PA
Netgear WNDR3400
Windows 7

Don't have a screen shot, but I just got an Arris 722G today, so from my Netgear router:

Router's IPv6 Address On WAN
2001:558:

Router's IPv6 Address On LAN
2601:b:

Whitehouse Station, NJ
Motorola SB6121 modem connected to ASUS RT-N16 with toastman's tomato build.

Don't have a screenshot either, just lit up at around 6AM today. Note, getting tomato working with this was a pain, there's a thread on the forums helping out.

Public IP starts with 2601:c:

(topic move) [IPv6] Is this native IPv6?

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The post that was here, has been moved to a new topic .. » [IPv6] Is this native IPv6?

Re: [IPv6] Evidence of Comcast IPv6 CPE Dual Stack (CPE and CPEP

Flags: X - disabled, I - invalid, D - dynamic, G - global, L - link-local
 #    ADDRESS                                     FROM-... INTERFACE        ADV
 0  G 2601:1:xxxx:xx::/72                                  eth1-wan         no
 1 XG ::/64                                                eth2-lan         yes
 2 DL fe80::20c:42ff:fe73:dfc0/64                          eth1-wan         no
 3 DL fe80::20c:42ff:fe73:dfc1/64                          eth2-lan         no
 4  G 2601:1:xxxx:xx:xxx::1/64                             eth2-lan         yes
 

Hello.

Does anyone know if the Comcast CMTS in Atlanta is capable of IPv6? Got the new firmware update for the Moto SB6120 yesterday and for a moment, the configuration page said the modem was in IPv6 mode. But now, it's back to IPv4 mode.

Does anyone know if the Comcast Atlanta CMTS is capable of IPv6? I tried that lookup of the MAC address and it seemed to indicate a brand that was not Cisco. So, I thought it would get IPv6 soon.

Thanks.

I have a WNDR4500 but it's not getting the IPv6 address correctly...at least when I remove the 6to4 setting, my browser tests all fail on the IPv6 tests.

I just want to say Thank You to all of you for posting these.. I am really glad all the hard work is getting used ..

Comcast Tuska

(topic move) [IPv6] Have Cisco CMTS's gone native IPv6 yet?

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(topic move) [IPv6] My router doesn't work over IPv6

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The post that was here (and all 1 followups to it), has been moved to a new topic .. »[IPv6] My router doesn't work over IPv6

Re: [IPv6] Evidence of Comcast IPv6 CPE Dual Stack (CPE and CPEP

As you can see above, the router issue has been solved.

The WNDR3700v4 uses a newer Atheros chipset (as opposed to the Broadcom chipset of the v3, or older Atheros chipset of the v2) - thus, no third-party firmware is available (yet).

Re: [IPv6] Evidence of Comcast IPv6 CPE Dual Stack (CPE and CPEP

test-ipv6 screencap

I noticed yesterday that Comcast loaded a new firmware into my Comcast provided modem, and it does show IPv6 settings now, but they are not yet enabled. This is in Jacksonville FL with a business account and an SMC modem/router combination.

At the same time (probably) and the reason I checked the modem, my connectivity became pretty poor. The modem keeps getting very slow about every 1-2 minutes with pings to the modem itself exceeding 1sec. Also, the web based admin interface doesn't respond well at all. The modem is also not listed as IPv6 capable at »mydeviceinfo.comcast.net (but maybe they only consider the old firmware). I suspect they may be trying to do too much with this modem.