Subj : Comcast & IPv6
To   : Bill McGarrity
From : Michiel van der Vlist
Date : Mon May 12 2014 21:58:42

Hello Bill,

On Monday May 12 2014 11:29, you wrote to me:

 MvV>> ready. So my guess is that:

 MvV>> 1) It is your router that is not IPv6 ready

 BM> It's the router... it's a Cisco E3000

I hag a look at the specs and I can't find anything about IPv6, so I guess you are right, your router does not support IPv6. :-(

I am a bit surprised, it does not look that old.  Five years ago, when I got my SixXs tunnel and with that IPv6 access to the Internet, I promised myself not to by any more new network equipment that did not support IPv6. Back then the list of IPv6 capable routers was short, but that was five years ago.

Maybe there is a firmware upgrade available?

Just to dod some more illimination: what happens when you bypass the router ad plug your computer directly into the cable modem? What does comcar tell you then? And what does http://test-ipv6.com/ say?

 BM> I'm running Server2008 Enterprise... it says it's IPv6 ready.. :)

OK.

 MvV>> What happens if you open up a command window and type:
 MvV>> "ipconfig" ?

 BM> says:
 BM> .
 BM> IPv6 address: 2002:ae39:cd76:0:89a0:1f59:d57d:61da

So you DO have an IPv6 address. But... it is a 6to4 address. The 2002: is the 6to4 prefix and the ae39:cd76 is the hex representation of your IPv4 address 174.57.205.118.

The last four 16 bit hex numbers, the host part,  are probably derived form your MAC address, they are the same as those in the lnk local address below.

 BM> Link-local IPv6: fe80::89a0:1f59:d57d:61da%10

fe80:: is the prefix for a link local address, the host part is derived form the  MAC address of the NIC.

 BM> IPv4 Address: 192.168.1.2
 BM> Subnet Mask: 255.255.255.0
 BM> Default Gateway: fe80::6a7f:74ff:fec4:3c75%10

That one is probably the link local address of your router. Again, the host part derived from the MAC address (of your router)

But... if that router has a link local address, it must have IPv6...

So maybe it DOES have IPv6 but you need to enable something to make it work...

I suggest you ask Cisco.


Cheers, Michiel

--- GoldED+/W32-MINGW 1.1.5-b20110320
 * Origin: 2001:470:1f15:1117::1 (2:280/5555)

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