Announcements
You Could WIN A Year Of Wireless Service – Learn More!

Tutor

 • 

11 Messages

Wed, Jan 14, 2015 4:04 PM

ATT IPV6 tunnel issue solved (Cisco router only)

Just now I fixed my own problem...for once.

 

If you have a Cisco router behind NVG510 in IP passthrough follow these steps:

 

1: Go to the gateway broadband status page. There you will find an IPV6 address and a border relay address.

 

2: The IPV6 address is a /60 so go to http://www.gestioip.net/cgi-bin/subnet_calculator.cgi and subnet it into /64 networks.

 

3: Create a 6to4 tunnel on the cisco router.

 

Router(config)# interface tunnel (tunnel number here ei 0)

Router(config-if)# tunnel mode ipv6ip

Router(config-if)# tunnel destination (border relay address here ei 1.2.3.4)

 

Ok, so now you will assign the first ip of the first subnet here (2602:x:x:x::1/64)

 

Router(config-if)# ipv6 address 2602:x:x:x::1/64

Router(config-if)# exit

 

4: Add the first ip from the second subnet to your inside facing interface (vlan 2 for me)

 

Router(config)# interface vlan 2

Router(config-if)# ipv6 address 2602:x:x:x:1::1/64

 

Configure the interface for client autoconfig

 

Router(config-if)# ipv6 nd other-config-flag

Router(config-if)# exit

Router(config)#

 

4: Set the default IPV6 route to be the tunnel interface

 

Router(config)# ipv6 route ::0/0 tunnel 0

 

5: Enjoy IPV6

 

Side note: If you have an 802.11N-draft access point, you may need to drop to 802.11g mode in order for ipv6 autoconfig to work on your computers (My experience with Linksys WRT120N)

Responses

Tutor

 • 

11 Messages

5 years ago

Forgot a few things.

 

1: Set the tunnel source to your WAN interface

 

Router(config)#  int tunnel0 (or whatever your interface is)

Router(config-if)# tunnel source f0/0 (your WAN facing interface)

 

2: Set router advertisements to on (default on my router)

 

Router(config)# int vlan 2 (your LAN facing interface)

Router(config-if)# no ipv6 nd ra suppress

 

3: I probably won't have time to respond to questions about this so...

 

http://www.cisco.com/c/en/us/td/docs/ios/ipv6/configuration/guide/12_4t/ipv6_12_4t_book.pdf

 

Refer all questions to this link

Tutor

 • 

11 Messages

5 years ago

Last thing... I promise...maybe.

 

Don't forget to turn on ipv6 routing.

 

Router(config)# ipv6 unicast-routing

Tutor

 • 

11 Messages

5 years ago

Just a little laugh for anyone interested:

 

Screen Shot 2015-01-14 at 2.39.55 PM.png

Contributor

 • 

1 Message

4 years ago

I upgraded my service to the new AT&T U-verse Power Tier back in October which replaced my old 2Wire 3801 residential gateway with the brand new Motorola NVG589 unit. This unit was deployed with AT&T’s IPv6 6rd tunnel solution enabled out of the box. 300-085 VCE This provided IPv6 access to the segment directly attached to my residential gateway with a /60 netblock assignment. It’s a pretty generous assignment, aside from the fact that it only assigned a single /64 to the local LAN and there was no obvious way to delegate the 15 other /64 networks to a downstream router.

Tutor

 • 

6 Messages

2 years ago

Too bad this won't work with native IPv6 now :(. Seems the only solution it to figure out how to bypass the stupid residential gateway (mine is a BGW210-700). Unfortunately this will require the router to authenticate to the ONT. If only AT&T would follow the RFC's properly...