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Message 11 of 96

Re: IPv6 addresses given but no connection

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@De_Carabas

 

Just a thought, you haven't set the prefix to 32 in the IPv6 settings page by any chance?  That may explain the /56 showing on the LAN side.  Not sure what effect that would have on connectivity.

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Message 12 of 96

Re: IPv6 addresses given but no connection

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Here's the setup instructions https://www.asus.com/support/Knowledge-searchV2/?keyword=ASUSWRT%20IPv6%20

 

The only variation I've tried is manually setting the DNS.

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Message 13 of 96

Re: IPv6 addresses given but no connection

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The actual router model number would be helpful.  The link leaves out a lot of info for the WAN settings.

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Message 14 of 96

Re: IPv6 addresses given but no connection

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Yes good point.  The router is an Asus RT-N66U.  I was on the latest beta Merlin firmware https://asuswrt.lostrealm.ca/ but to remove a variable I just flashed back to the stock latext firmware - 3.0.0.4.380.7378.

Everything is the same however, other than it's currently not reporting a WAN IPv6 address... Although I see this in the log - "May 10 12:14:51 dhcp6 client: bound prefix 2a00:23c5:7604:4200::/56" but I guess that's LAN?

 

Current info on the IPv6 status - <screenshot>

         IPv6 Connection Type: Native with DHCP-PD
              WAN IPv6 Address: 
              WAN IPv6 Gateway: fe80::ea4:2ff:fe3e:1
              LAN IPv6 Address: 2a00:23c5:7604:4200::1/56
   LAN IPv6 Link-Local Address: fe80::a60:6eff:fecc:1ff0/64
                       DHCP-PD: Enabled
               LAN IPv6 Prefix: 2a00:23c5:7604:4200::/56
                   DNS Servers: 2620:0:ccc::2 2620:0:ccd::2 


IPv6 LAN Devices List
-------------------------------------------------------------------
Hostname                         MAC Address       IPv6 Address                           
                                 c0:56:27:8e:f1:83 2a00:23c5:7604:4200:61a0:207f:a679:4300, 2a00:23c5:7604:4200:1875:59e3:c82d:4d79

IPv6 settings page <screenshot>

 

Main WAN Setup <screenshot>

 

Hope the links work ok, Dropbox changed the way links to files/images work and some forums don't like it.

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Message 15 of 96

Re: IPv6 addresses given but no connection

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@De_Carabas wrote:

Everything is the same however, other than it's currently not reporting a WAN IPv6 address... Although I see this in the log - "May 10 12:14:51 dhcp6 client: bound prefix 2a00:23c5:7604:4200::/56" but I guess that's LAN?

 

 


Not reporting a WAN address is not necessarily wrong. BT do not use IPv6 Global Addressing i.e., from the 2000::/3 range on the WAN, but instead use Link Local (fe80) addressing.

 

In terms of the log message, I think this is about the WAN. The way the router works is by using a DHCP client on the WAN PPPoE interface to request an IPv6 prefix via 'Prefix Delegation' from an upstream BT DHCP server. BT allocate a /56 and then your router is free to allocate addresses from this range as it sees fit. What I'd expect is that the router allocates /64 to the LAN interface.

 

Are there any tools on the router e.g., ping6? If so can you try and ping something on the Internet from the router? You could also try and ping the 'WAN IPv6 Gateway' address e.g., fe80::ea4:2ff:fe3e:1? As this is a Link Local address you may need to specify the interface that needs to be used. On my router I append '%pppoe0' to the ping command as follows:

 

smf22@erx1:~$ show ipv6 route
IPv6 Routing Table
Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,
       IA - OSPF inter area, E1 - OSPF external type 1,
       E2 - OSPF external type 2, N1 - OSPF NSSA external type 1,
       N2 - OSPF NSSA external type 2, B - BGP
Timers: Uptime
IP Route Table for VRF "default"
K      ::/0 [0/1024] via fe80::223:3eff:fe6e:e650, pppoe0, 6d06h20m
[snip]

smf22@erx1:~$ ping6 fe80::223:3eff:fe6e:e650%pppoe0
PING fe80::223:3eff:fe6e:e650%pppoe0(fe80::223:3eff:fe6e:e650) 56 data bytes
64 bytes from fe80::223:3eff:fe6e:e650: icmp_seq=1 ttl=255 time=5.14 ms
64 bytes from fe80::223:3eff:fe6e:e650: icmp_seq=2 ttl=255 time=5.06 ms
^C
--- fe80::223:3eff:fe6e:e650%pppoe0 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 5.062/5.105/5.149/0.083 ms

A quick Google seems to suggest that the Asus WRT Merlin software has command line access. If you have access to this we may be able to get more information than from the GUI.

 

Regards

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Message 16 of 96

Re: IPv6 addresses given but no connection

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Links work fine.

I had a look at the manual, it's pretty uninformative.  I can't find any reference to WAN settings.  Those that are in the Advanced setup part.  Only reference to WAN I can find relates to the auto quick setup.  Useless.

Can you post an image of the settings currently shown in Advanced - WAN.

Might shed some light.  What modem are you using?

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Message 17 of 96

Re: IPv6 addresses given but no connection

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The other thing to try is whether you can traceroute6 towards the prefix you have been assigned. If you try http://www.subnetonline.com/pages/ipv6-network-tools/online-ipv6-traceroute.php and enter the address of a host on your LAN, how far does the trace get?

 

Also is there any access to the firewall statistics or logs? If so what do you see and are there any hits on any drop counters?

 

Regards

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Message 18 of 96

Re: IPv6 addresses given but no connection

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Lots of posts to (try) and answer! Cool.

 

Not sure where you are looking at for Advanced -WAN.   Here's the screenshot of the bottom of the Wan setup page. <link>

 

Is there a setting in particular you are looking for? 

 

For the Modem, it's the standard one supplied by BT.  White and labeled as Openreach.

 

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Message 19 of 96

Re: IPv6 addresses given but no connection

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Given that I have the same issue on Stock and the Merlin Firmware I've gone back to the Merlin as it has more flexibility.

I have SSH access.  From the router I tried pinging the WAN IPv6 Gateway address and got 100% packet loss.  As a test I pinged the WAN IP Address which worked.

 

I have Ping and ping6 commands that both say to use -I to specify interface but pppo0 doesn't work.  Trying to find examples...

 

 

I tried the trace route back to the Address on this PC

traceroute to 2a00:23c5:7604:4200:74c7:b68b:d752:ebd4 (2a00:23c5:7604:4200:74c7:b68b:d752:ebd4), 30 hops max, 40 byte packets
 1  gw-v130.xl-is.net (2a02:348:82::1)  2.859 ms  2.899 ms  0.270 ms
 2  te0-22.cr1.nkf.as49685.net (2001:4cb8:40b:1::1d01)  1.126 ms  1.443 ms  1.597 ms
 3  ams-ix.bt.com (2001:7f8:1::a500:5400:1)  0.694 ms  0.690 ms  0.649 ms
 4  2a00:2000:0:80c0::d7 (2a00:2000:0:80c0::d7)  7.241 ms 2a00:2000:0:80c0::d9 (2a00:2000:0:80c0::d9)  7.304 ms 2a00:2000:0:80c0::5c (2a00:2000:0:80c0::5c)  7.278 ms
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 ---- Finished ------ 
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Message 20 of 96

Re: IPv6 addresses given but no connection

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Firewall  - Yes both IPv4 and IPv6  The settings page for the IPv6 firewall is pretty basic.  On/OFF and then inbound rules.

The main Firewall tab has option to specify logging level and I've changed it to 'dropped'.  Not sure if it applies to both v4 and v6 but i've set that and then I'll do some pinging and see what we get.

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