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dccatl1
join:2009-12-28
Mableton, GA

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

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1) Mableton, GA
2) Zoom 5341J --> Netgear WNDR4500
charlesed
join:2011-06-28
Minneapolis, MN

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Crystal, MN
pfSense 2.1-RC1 (i386, built on Wed Aug 28 16:55:02 EDT 2013)
djoye
join:2009-08-15
Murfreesboro, TN

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Nashville
5341j
Netgear WNDR4300

Chris 313
Because It's Geekier
Premium Member
join:2004-07-18
Houma, LA
·AT&T FTTP
·Comcast XFINITY

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Houma, La
Motorola SB6141
Asus RT-N66U
Windows XP SP3

From »test-ipv6.com/ -

Your IPv4 address on the public Internet appears to be 75
(COMCAST-22258 - Comcast Cable Communications Holdings, Inc)

Your IPv6 address on the public Internet appears to be 2601
(COMCAST-7922 - Comcast Cable Communications, Inc.)

Since you have IPv6, we are including a tab that shows how well you can reach other IPv6 sites. [more info]

Good news! Your current configuration will continue to work as web sites enable IPv6.

Rediness score: 10/10

Keep up with the good upgrades, NetDog. Your IPv6 upgrades have spread to Louisiana and the Cisco 10k CMTSs that we have here!

Trips
join:2002-06-14
Augusta, GA

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Augusta, GA
Arris CM820A
Linksys E4200v2
Windows 7 Ultimate 64-bit
willmo
join:2013-06-03
Seattle, WA

1 recommendation

willmo

Member

Working now, everything's 10/10. Thanks guys! This is about as good as it gets for residential ISP support.
willmo

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Now packets from my LAN aren't even making it to hop 3 in the traceroute I posted. PMs sent.

I did have an issue a couple times where OpenWRT's new DHCPv6 client (odhcp6c) freaked out and started sending packets out the WAN interface as fast as it could (many thousands per second), using 100% CPU. This happened once a couple months ago and again a few days ago, which was why I decided to update OpenWRT Tuesday night. I didn't really have a chance to investigate since at the time I just needed my router to stop being slow (killing the process fixed it). I'd been wondering if that would cause me to be IPv6-blacklisted or something. But hopefully since IPv6 wasn't enabled then (at least the first time) the packets never made it to the DOCSIS side of my modem...

netcool
Premium Member
join:2008-11-05
Englewood, CO

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said by willmo:

Clearly packets from my LAN *are* making it out of my router into Comcast's network (the 2001:558 addresses), but Comcast is not routing packets to and/or from my LAN.

Can you run your tests again? Your CMTS wasn't properly advertising its IPV6 routes, we corrected the config and you should be good now.

NetDog
Premium Member
join:2002-03-04
Hollywood, FL

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said by willmo:

Seattle, WA (Capitol Hill)
SB6121
Netgear WNDR3700v1
OpenWRT trunk r37767 (I build it from source myself)
Performance

Your CMTS is enabled for IPv6 CPE, I just checked send me your CM MAC please so I can check your modem.
willmo
join:2013-06-03
Seattle, WA

willmo

Member

Actually it appears that my router is working, and Comcast just hasn't finished enabling IPv6 here yet.

My router itself has full IPv6 connectivity, but machines on my LAN can't reach the Internet. At first I assumed my router wasn't routing, but traceroute6 says otherwise. On the router:

# traceroute6 ipv6.test-ipv6.com
traceroute to ipv6.test-ipv6.com (2001:470:1:18::119), 30 hops max, 16 byte packets
 1  2001:558:600a:63::1 (2001:558:600a:63::1)  7.467 ms  7.149 ms  19.396 ms
 2  2001:558:a2:2037::1 (2001:558:a2:2037::1)  8.975 ms  9.811 ms  10.053 ms
 3  ae-20-0-ar03.seattle.wa.seattle.comcast.net (2001:558:a0:212::1)  10.455 ms  9.788 ms  9.513 ms
 4  he-1-7-0-0-11-cr01.seattle.wa.ibone.comcast.net (2001:558:0:f741::1)  10.425 ms  9.843 ms  11.317 ms
 5  if-xe-0-3-1.0.tcore1.00S-Seattle.ipv6.as6453.net (2001:5a0:1f00:200::d)  9.157 ms  7.804 ms  10.116 ms
 6  if-ae14.2.tcore1.PDI-PaloAlto.ipv6.as6453.net (2001:5a0:200:400::e)  36.608 ms  32.630 ms  30.402 ms
 7  if-ae2.2.tcore2.PDI-PaloAlto.ipv6.as6453.net (2001:5a0:1200:300::2)  27.083 ms  25.687 ms  27.414 ms
 8  if-ae5.2.tcore2.SQN-SanJose.ipv6.as6453.net (2001:5a0:1500:500::1)  48.423 ms  54.270 ms  36.242 ms
 9  gigabitethernet5-16.core1.sjc2.he.net (2001:470:0:196::1)  38.951 ms  38.941 ms  36.617 ms
10  10gigabitethernet1-1.core1.fmt1.he.net (2001:470:0:2f::1)  37.464 ms  36.564 ms  40.913 ms
11  ip119.gigo.com (2001:470:1:18::119)  37.621 ms  44.905 ms  39.549 ms
 

On a machine on my LAN:

$ traceroute6 ipv6.test-ipv6.com
traceroute6 to ipv6.test-ipv6.com (2001:470:1:18::119) from 2601:8:b1xx:xxxx:xxxx:xxxx:xxxx:xxxx, 64 hops max, 12 byte packets
 1  2601:8:b1xx:xxxx::1  1.131 ms  3.477 ms  1.396 ms
 2  2001:558:4082:63::1  9.603 ms  12.047 ms  10.439 ms
 3  2001:558:a2:2034::1  18.784 ms  17.231 ms  16.693 ms
[wait a while]
^C
 

Clearly packets from my LAN *are* making it out of my router into Comcast's network (the 2001:558 addresses), but Comcast is not routing packets to and/or from my LAN.

It's interesting how they do this in stages: last night my router wasn't getting any DHCPv6 responses, but it was spewing messages about being unable to reach several addresses in 2001:558:4082:63::/64. I assume it was receiving ICMPv6 packets and trying to respond, but couldn't because it didn't have an IPv6 address (?).

Oh well, I'm patient. :-)

Seattle, WA (Capitol Hill)
SB6121
Netgear WNDR3700v1
OpenWRT trunk r37767 (I build it from source myself)
Performance
willmo

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Looks like they're in the midst of enabling it here. comcast6.net says my CMTS is supported. test-ipv6.com says I have nothing, but machines on my LAN have an IP...or several...

en0: flags=8863 mtu 1500
ether 20:c9:xx:xx:xx:xx
inet6 fe80::xxxx:xxxx:xxxx:xxxx%en0 prefixlen 64 scopeid 0x4
inet6 2601:8:b1xx:xxxx:xxxx:xxxx:xxxx:xxxx prefixlen 64 autoconf
inet6 2601:8:b1xx:xxxx:xxxx:xxxx:xxxx:xxxx prefixlen 64 autoconf temporary
inet6 fd9f:xxxx:xxxx::xxxx:xxxx:xxxx:xxxx prefixlen 64 deprecated autoconf
inet6 2601:8:b1xx:xxxx::xxx prefixlen 64
inet 192.168.1.x netmask 0xffffff00 broadcast 192.168.1.255
media: autoselect
status: active


Very possible that my router is misconfigured or buggy (OpenWRT trunk from last night, with some old config files that probably need to be updated). I'm looking into it.
Madtown
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join:2008-04-26
93637-2905

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Madera, Ca (Parkwood)

SB6121

Netgear WNDR3700

Performance
Expand your moderator at work

PaulGo
join:2005-01-29
Gaithersburg, MD

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

Congratulations! You appear to have both IPv4 and IPv6 internet working. If a publisher publishes to IPv6, your browser will connect using IPv6. Your browser prefers IPv6 over IPv4 when given the choice (this is the expected outcome).

Your DNS server (possibly run by your ISP) appears to have IPv6 internet access.
Your Readiness Scores
10/10 Important Measure: Your IPv4 stability, when sites offer both IPv4 and IPv6
10/10 Long-Term: Your IPv6 readiness when sites go IPv6-only - NOT CRITICAL right now

North Potomac, MD
Netgear R6300 router
Motorola SB6141 modem

Oregonian
Premium Member
join:2000-12-21
West Linn, OR

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West Linn, Oregon
SB6120 modem and a Linksys EA4500 router.
grod46
join:2012-11-25
Fresno, CA

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comcast6.net
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HTC One
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Nexus 7
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t
1:Firebaugh,Ca
2:SMCD3GNV (Bridged) to a D-LINK DIR-615
earletp
join:2004-02-03
PDX
ARRIS SB8200
Asus RT-AC68

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Portland, Oregon
Motorola SB6120 to a Netgear WNDR4500
Scilicet (banned)
Spaced Out
join:2005-04-11
Aurora, CO

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1. Aurora, CO
2. Modem: Motorola SB6120
3. Neatgear WGR614v10 (not yet configured)

I hadn't noticed this until today. The modem has been at IPv4 for I don't know how long. I've been troubleshooting a network problem and the IPv6 popped up on the modem status page.

Edit: It would seem that the Netgear WGR614v10 does not support IPv6. Wonderful!

bradyr
YCCD - Network Operations
Premium Member
join:2008-10-27
Sonora, CA
(Software) pfSense
Netgear CM1200
Ubiquiti UAP-AC-HD

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IPv6 Connection Type: Native with DHCP-PD
WAN IPv6 Address: 2001:558:6012:38:4c81:eba6:7420:3b8a/64
WAN IPv6 Gateway: fe80::201:5cff:fe3d:ac41
LAN IPv6 Address: 2601:c:9c80:7b:62a4:4cff:fe29:6cb8/64
LAN IPv6 Link-Local Address: fe80::62a4:4cff:fe29:6cb8/64
DHCP-PD: Enabled
LAN IPv6 prefix: 2601:c:9c80:7b::/64
DNS Address: 2001:558:feed::1 2001:558:feed::2



lit up IPv6 for a day and a half just for because. Everything seems ready to rock and roll. Might turn it on permanently once I get some proper IPv6 firewall rules setup.

-Sonora, CA (95370)
-Zoom 5341J
-ASUS rt-n66u running latest Merlin firmware (3.0.0.4.372.30_2 at the time of this post)
ViRGE
join:2002-10-25

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1. Salem, OR
2. Modem: Motorola SB6121
3. Linksys E3000, Running Tomato USB (Toastman, latest)

Coelispex
join:2013-06-03
Howell, MI

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1. Wilmette, IL (60091)
2. Modem: Motorola SurfBoard SB6141
3. Linksys EA2700 N600 Dual-Band Wireless-N Router
JNhome
join:2012-07-15
Salinas, CA

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Went live in Salinas, CA (70mi south of San Jose) in June 2013
CplEstesUSMC
join:2005-02-16
Douglasville, GA

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Winston Georgia
ASUS RT-N66U - Firmware 3.0.0.4.370_172-g85af9d0
I never got IPv6 address until my firmware was updated
bgoodbody
Bill G
join:2002-05-08
North Truro, MA

1 recommendation

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The Cisco CMTS has begun.
»www.comcast6.net/

pende_tim
Premium Member
join:2004-01-04
Selbyville, DE

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Have IPv6 running down here in Selbyville, DE 19975. Asus RT-N16/Tomato 1.28 behind a Zoom Model "J".

NetFixer
From My Cold Dead Hands
Premium Member
join:2004-06-24
The Boro
Netgear CM500
Pace 5268AC
TRENDnet TEW-829DRU

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Add another D-Link router to the list of routers that seem to fully support Comcast's dual stack implementation. I've got to give D-Link a big thumbs up; they seem to be trying very hard to make their entire current residential/soho router product line IPv6 functional. Of course (as with most vendors) if you have an older hardware version that is not in current production, you will likely be out of luck unless your particular router is supported by OpenWRT, DDWRT, et al.

Netgear EBR-2310-C1 firmware rev 3.01





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artie
join:2002-07-14
Panama City, FL

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

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1) Panama City, Florida
2) Direct Connect w/ Windows 7
3) ^
jmsq
join:2013-04-25
West Lafayette, IN

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1) West Lafayette, IN
2) Linksys E3000 running Tomato

NetFixer
From My Cold Dead Hands
Premium Member
join:2004-06-24
The Boro
Netgear CM500
Pace 5268AC
TRENDnet TEW-829DRU

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Here are the test results using the D-Link DIR601-A1 with 1.04NA firmware I obtained from the D-Link Canadian web site: »www.dlink.com/ca/en/supp ··· =ca_reva

The D-Link US website does not have that firmware release, and it contains some significant improvements to IPv6 implementation over the 1.02NA firmware that is available on the D-Link US web site.