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IPV6 6to4

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banger:
Trying to configure IPv6 on a non native 6to4 network on an Asus router. It worked on ipv6-test.com the other day but reloading the same settings it no longer works. Here are my settings

Connection type   6to4
IPv4 Anycast Relay   
192.88.99.1
Tunnel MTU   
1280
Tunnel TTL   
255

I have a IPv6 LAN address and am using TBB BQM to ping it and it responds but I cannot browse any IPV6 sites or test sites say no IPV6 address advertised. Any thoughts?

Chrysalis:
sounds like the lan side dhcp6 and radvd is not working properly, so in short the router has ipv6 but the clients behind it do not.

Check if they enabled in the asus settings.

banger:
As far as I can tell the windows box has IPV6 connectivity but just simply doesn't work.

smf22:
If you run ipconfig from the command prompt of the Windows client does it show an IPv6 Global Unicast Address and is this from the same range that you see on the router?

I'm assuming you don't want to run an IPv6 DHCP server on the Asus and will simply run SLAAC (Stateless Address Autoconfiguration) for the clients to get an IPv6 address? SLAAC is the simplest option and has the router advertising the IPv6 address prefix in an IPv6 Router Advertisement (RA) which are seen and used by the clients to determine the IPv6 address prefix they should use. I'm not sure how to do this on an Asus, but hopefully there's an option to enable SLAAC on the LAN interface.

If you have Wireshark installed on the Windows client you could try capturing the IPv6 RA as follows:

1. Open a command line prompt as Administrator
2. Enter cd C:\Program Files\Wireshark
3. Run the command ipconfig to get the name of the LAN interface on the client. In the example below mine is named "Home_LAN"


--- Code: ---C:\Users\smf22>ipconfig

Windows IP Configuration

Ethernet adapter Home_LAN:

   Connection-specific DNS Suffix  . : home
   IPv6 Address. . . . . . . . . . . : 2a00:23c5:xxxx:yyyy:a039:ce9f:e009:15ae
   Temporary IPv6 Address. . . . . . : 2a00:23c5:xxxx:yyyy:6d54:48c5:83eb:8895
   Link-local IPv6 Address . . . . . : fe80::a039:ce9f:e009:15ae%5
   IPv4 Address. . . . . . . . . . . : 192.168.1.78
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : fe80::46d9:e7ff:fe50:5b7e%5
                                       192.168.1.1

--- End code ---

4. Run the command tshark -V -i <interface_name> icmp6 and ip6[40]==134 to capture the IPv6 Router Advertisement. You'll need to change the <interface_name> to that you found in step 3.

What we're looking for is an ICMPv6 option specifying the IPv6 prefix, for example:


--- Code: ---Ethernet II, Src: Ubiquiti_50:5b:7e (44:d9:e7:50:5b:7e), Dst: IPv6mcast_01 (33:33:00:00:00:01)
    Destination: IPv6mcast_01 (33:33:00:00:00:01)
    [snip]
Internet Control Message Protocol v6
    Type: Router Advertisement (134)
    Code: 0
    [snip]
    Router lifetime (s): 1800
    Reachable time (ms): 0
    Retrans timer (ms): 0
    ICMPv6 Option (Prefix information : 2a00:23c5:xxxx:yyyy::/64)
        Type: Prefix information (3)
        Length: 4 (32 bytes)
        Prefix Length: 64
        Flag: 0xc0, On-link flag(L), Autonomous address-configuration flag(A)
            1... .... = On-link flag(L): Set
            .1.. .... = Autonomous address-configuration flag(A): Set
            ..0. .... = Router address flag(R): Not set
            ...0 0000 = Reserved: 0
        Valid Lifetime: 2592000
        Preferred Lifetime: 604800
        Reserved
        Prefix: 2a00:23c5:xxxx:yyyy::

--- End code ---

banger:

--- Code: ---Ethernet adapter Ethernet 4:

   Connection-specific DNS Suffix  . :
   IPv6 Address. . . . . . . . . . . : 2002:****:****:0:9559:edde:8bc:bbfe
   Temporary IPv6 Address. . . . . . : 2002:****:****:0:751e:2364:b10b:b77a
   Temporary IPv6 Address. . . . . . : 2002:****:****:0:c9d1:7fdd:26af:3a43
   Link-local IPv6 Address . . . . . : fe80::9559:edde:8bc:bbfe%13
   IPv4 Address. . . . . . . . . . . : 192.168.1.54
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : fe80::e23f:49ff:fe97:436c%13
                                       192.168.1.1
--- End code ---

I got as far as ipconfig but got a bit lost with wireshark. I might just wait for Native IPV6 which is planned. Router advertisment is on in the 6to4 settings on the Asus.

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