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theisonews
join:2013-09-19
Miami, FL

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theisonews

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[IPv6] why can't I test ipv6


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Split from this topic --> »[Speed] New Comcast dual stack speed test
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why can't I test the ipv6. I have Comcast and windows 8 and I live in Miami florida usa 33193

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

NetFixer

Premium Member

Re: [Speed] New Comcast dual stack speed test

said by theisonews:

why can't I test the ipv6. I have Comcast and windows 8 and I live in Miami florida usa 33193

I have no idea. What browser do you use? What modem and router do you use? What results do you see if you go to »comcast6.net/ and »test-ipv6.com/ ?
theisonews
join:2013-09-19
Miami, FL

theisonews

Member

i use IE10 and Opera16, I have no router only modem and it's an Arris tm822 from the link you provided I get

Your CMTS is not supported at this time
Your IPv4 address on the public Internet appears to be
removed

Your IPv6 address on the public Internet appears to be 2002:328c:3f32::328c:3f32
Your IPv6 service appears to be: 6to4

Your Internet Service Provider (ISP) appears to be COMCAST-20214 - Comcast Cable Communications Holdings, Inc

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

You appear to be using a public 6to4 gateway; your router may be providing this to you automatically. Such public gateways have no service level agreements; you may see performance problems using such. Better would be to get a native IPv6 address from your ISP. [more info]

Your DNS server (possibly run by your ISP) appears to have IPv6 Internet access.

Test with IPv4 DNS record
ok (0.137s) using ipv4

Test with IPv6 DNS record
ok (0.146s) using ipv6 6to4

Test with Dual Stack DNS record
ok (0.616s) using ipv4

Test for Dual Stack DNS and large packet
ok (0.394s) using ipv4

Test IPv4 without DNS
ok (0.196s) using ipv4

Test IPv6 without DNS
ok (0.234s) using ipv6 6to4

Test IPv6 large packet
ok (0.134s) using ipv6 6to4

Test if your ISP's DNS server uses IPv6
ok (0.664s) using ipv4

Find IPv4 Service Provider
ok (0.533s) using ipv4 ASN 20214

Find IPv6 Service Provider
ok (0.488s) using ipv6 6to4

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

1 edit

1 recommendation

NetFixer

Premium Member

said by theisonews:

I have no router only modem and it's an Arris tm822 from the link you provided I get

Your CMTS is not supported at this time
Your IPv4 address on the public Internet appears to be
removed

Your IPv6 address on the public Internet appears to be 2002:328c:3f32::328c:3f32
Your IPv6 service appears to be: 6to4...

The statement "Your CMTS is not supported at this time" means that your local Comcast infrastructure does not support native IPv4/IPv6 dual stack. That is why the Comcast IPv6 speed test does not run.

You do seem to have IPv6 connectivity using a 6to4 tunnel, but that means that Windows tries by default to use IPv4 connectivity before it tries to use IPv6 connectivity, and I believe that is the reason that Comcast's speed test does not even try to run the IPv6 test. While there is a way to force Windows to give a 6to4 tunnel priority over IPv4 traffic, I am not going to even point to any articles explaining how to do that since I don't think it is a good idea (one of a small number of network default settings that MS and I agree on).

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

NetDog to theisonews

Premium Member

to theisonews

Re: [IPv6] why can't I test ipv6

PM me your IPv4 address I would like to check the CMTS that supports your area.