IPV6 help

Fizzy · Aug 16, 2013, 02:40:40

Hi,

I've been trying to get IPV6 working on my home setup. I'm using a Draytek Vigor 2750 FTTC box.

Basically I've set everything up on the router to issue local addresses (FD00: range) and can ping the router from my pc using the Ping -6 option to it's configured/gateway address. If I try to get anything beyond that it doesn't work. Eg :-

C:\Windows\system32>ping -6 ipv6.idnet.net

Pinging ipv6.idnet.net [2a02:390:1:0:20f:1fff:fe03:ca47] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 2a02:390:1:0:20f:1fff:fe03:ca47:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

I've checked on the WAN connection details and it's only giving an FE80:: address (link) rather than a global (routable?) one. Does this mean that there is no proper IPV6 address being presented by idnet to my router? I'm using gateway 6 if that makes any difference.

Running a test via "test-ipv6.com" site states "No IPV6 address detected" - which I assume means the internet connection since the PC does have one (as well as it's autoconfigured address).

I've also noticed some strange speed issues lately too but that's for another post.....

Steve · Aug 16, 2013, 05:43:36

Could be wrong but I don't think anyone with IDNet has got IPv6 to work with a Draytek router

Fizzy · Aug 16, 2013, 07:26:04

Quote from: Steve on Aug 16, 2013, 05:43:36
Could be wrong but I don't think anyone with IDNet has got IPv6 to work with a Draytek router

Doesn't sound encouraging - but does sound like a challenge.

Steve · Aug 16, 2013, 07:36:45

There has been rare occasions when the dynamic IPv6 address has not been available, so maybe worth a phone call before you lose hair. On my Asus RT N66U I've had to use a static IPv6 wan address, otherwise its no go. How did I get the static - I copied the same wan IPv6 address utilised by my previous Billion 7800N which does pick up the wan address automatically. So again it's certainly not always straightforward.

Fizzy · Aug 16, 2013, 08:01:58

Well, using the BT provided modem thingy and a Windows 7 "dial up connection" network setup, IPV6 is working fine. I get 10/10 on test-ipv6.com.

Looks like the Draytek router is either very picky, or unlikely to work with IPV6 with idnet without some major hacking.

Steve · Aug 16, 2013, 08:17:38

Can you set a static option with the Draytek?

Would it be wrong (probably is as it's derived from the MAC on my machine, as I know little about IPv6 ) to use the static address you've got on the Windows machine as the WAN gateway?

Fizzy · Aug 16, 2013, 15:39:07

Quote from: Steve on Aug 16, 2013, 08:17:38
Can you set a static option with the Draytek?

Would it be wrong (probably is as it's derived from the MAC on my machine, as I know little about IPv6 ) to use the static address you've got on the Windows machine as the WAN gateway?

I could check what global address has been assigned to either my pc via the bt modem, or if the modem is in fact a router with reduced functionality whatever it has picked up. Would need to check how to get the info out of a stock bt box though.

The draytek does indeed allow me to specify a static IPV6 address - and in theory given the available range of IPV6 addresses gateways aren't actually needed most of the time. So as long as it talks out to the "big wide world" should work...... in theory. EDIT: I've just noticed you posted a reply stating the same thing a couple of posts up.

I'll try a few things later. Technically using a dynamically assigned ipv6 address as a static one may cause a conflict - but there are a lot more addresses so less chance of it.

If it works, then may see about getting a static ipv6 address assigned to my account (since I already have an IPV4 one).

Steve · Aug 16, 2013, 16:03:24

I've been having a look at my router - I've no idea where I got the static address from as it's not the same as one I was using on the 7800N. Interestingly for some reason I've just tried Native DHCP PD and it's worked, although of course it's dynamic which will mess up my TBB QM,it's never worked on this router before although I've probably not tried it on my current firmware. It's a complete mystery to me!!!!

andrue · Aug 18, 2013, 12:27:22

Quote from: Fizzy on Aug 16, 2013, 15:39:07If it works, then may see about getting a static ipv6 address assigned to my account (since I already have an IPV4 one).

I thought that if we were on static IPv4 we got a static IPv6 prefix anyway. Don't know why I thought that though since I can't find much information. All I've found is an old TBB post where one of the Simons says they are planning to offer static IPv6 prefixes eventually. That was in 2011.

Steve · Aug 18, 2013, 14:15:54

The IPv6 prefix is static as far as I am aware, it's just for things like monitoring ie TBB QM the latter part of WAN address on mine will change with every reboot.

andrue · Aug 18, 2013, 14:28:36

Quote from: Steve on Aug 18, 2013, 14:15:54
The IPv6 prefix is static as far as I am aware, it's just for things like monitoring ie TBB QM the latter part of WAN address on mine will change with every reboot.

Ah! When I set up a TBBQM I used the address of my Windows server and it seemed to stay the same despite my server auto rebooting once a week. I tried to give it a formal static address but it just lost all network connectivity

andrue · Aug 18, 2013, 15:57:42

Well that was easy. I took a closer look at the public IPv6 address on my laptop and router and realised they are both generated from their respective MAC addresses á la RFC 4291 (http://tools.ietf.org/html/rfc4291). That means they are effectively static. The only thing I can't quite follow is the output from the Windows command:

c:\>netsh interface ipv6 show addresses command

Addr Type DAD State Valid Life Pref. Life Address
--------- ----------- ---------- ---------- ------------------------
Public Preferred 23h59m58s 3h59m58s 2a02:xxxx:xxxx:1:226:22ff:fe1c:c68a

I'd have thought the valid life and preferred life would both be infinite.

Incidentally I just noticed that the RFC for this is the same as Victor Meldrew's phone number in One Foot in the Grave

http://www.youtube.com/watch?v=e0tiNwOpZ68

Fizzy · Aug 19, 2013, 02:10:34

Not having much luck with the Draytek.

Connected on the BT openreach box again (via Windows 7 PPP connection) and checked ip settings using IPConfig /all

It's been assigned a 2a02:390:xxxxxxx IPV6 address.
Link local is fe80::<same as main ipv6> - looks to be derived from the main IPV6 address or both are created using mac address or some other common reference.

Anyhow - default gateway is set to a different fe80:: address. Not sure where it has this from - possibly provided by idnet connection, or hardcoded address of the BT box? DNS servers are IDNET IPV4 addresses.

IPV6 connections work fine on this.

Back to the Draytek.

The WAN IPV6 section has a static ip option. When selecting this it asks for an address (inc a "/" suffix box), gateway address, and two DNS server addresses.

I enter just the address off the bt box - and after the connection to IDNET comes back, it shows the address in the WAN section, with "/0" suffix (net mask I assume?).

IPV6 tests still fail though and I get an error code when trying to ping via ipv6. IPConfig /all shows that there is no IPV6 default gateway on my network connection - so I add one in for the Draytek.

Ping now resolves name, but times out. Tracert shows it gets to internal draytek address, but then times out. Not getting out onto the WAN. This is the case whether I use the draytek LAN local link address or the LAN global address I configured on it for dhcpv6 puproses as the network connection gateway address.

I tried setting the default gateway on the draytek ipv6 WAN setup to the same as the one used with the BT box, but problem persists.

When the IDNET link comes up, it does have a local link ipv6 address showing on the WAN side. I tried setting this as the gateway address for the WAN IPV6 static settings, which it does accept - but then resets the WAN connection, and on reconnect the assigned local link address is different anyway. Not sure if this is the correct gateway address to use on the static settings though, or if one is in fact needed at all.

I have noted that this wan local link address has a "/10" suffix - so could be a net mask mismatch. Set the mask to the same on the static WAN ip on the draytek but still no joy.

So - tried various options but still can't seem to get out onto the WAN with IPV6 on the draytek.

Will probably have to disable IPV6 on my computers network connection for now since it's causing delays when things specifically try to connect via ipv6 specifically.

Looks like if I really want to use IPV6, will just have to use the BT modem/router box.