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Luieburger

@comcast.net

No IPV6 on SBG6580? It worked fine on the SB6121.

I have Comcast in Kirkland, WA and I have been using the Motorola SB6121 modem. It works great, but requires a router to divide up the connection and create Wi-Fi access. So I looked into the SBG6580 and decided to get that for an all-in-one solution for my networking needs.

My SB6121 had been giving me IPV6 addresses and tested fine on the following website: »test-ipv6.com/

However, now I am using the SBG6580 and the same test says I don't have IPV6.

What am I missing here?



Motohead

@army.mil

Most probably the software/firmware download from Comcast.



NetDog
Premium,VIP
join:2002-03-04
Parker, CO
kudos:79

1 recommendation

reply to Luieburger

The device could be pulling a 6to4 address. what address are you getting?



whfsdude
Premium
join:2003-04-05
Washington, DC
Reviews:
·Comcast

said by NetDog:

The device could be pulling a 6to4 address. what address are you getting?

If you don't want to share the whole address, you can just share the network prefix.

Eg. 2001:470:8:60e:c855:7dbc:63fa:57a
Share: 2001:470:8:60e:


chkthis

@comcast.net

»mydeviceinfo.comcast.net/

funny, it lists the 6121 as no IPV6 either, only the 6120

Motorola state that IPV6 is supported by the 6580, must be a Comcast related issue, they are still just testing IPV6.



Luieburger

@comcast.net
reply to NetDog

I get a link-local ipv6 address on my desktop (which is plugged into the modem/router) but when I test my IPv6 connection (»test-ipv6.com/) all it can see is my ipv4 address.



chkthis

@comcast.net

Maybe try manually entering Comcast's IPV6 DNS servers into the modem/router.

2001:558:FEED::1

2001:558:FEED::2



cablegeek01

join:2003-05-13
USA
kudos:1

1 recommendation

reply to Luieburger

I don't believe the 6580 currently supports IPv6 on the gateway side. Only IPv6 to the cable modem management interface. This could be firmware specific though. If your current firmware is below v3.2.1.0, it may not support any IPv6 functions. (1.0.3.2 for SB6120 and SB6121).
Since the SB6120 and SB6121 are bridging modems, and not gateway devices they will pass an IPv6 address to your CPE.
To be honest, I haven't seen any of the eRouter options on the SBG6580, so I'm not sure about it's IPv6 to CPE capabilities.