IPV6 Setup

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facsi
DD-WRT User


Joined: 27 Nov 2010
Posts: 213

PostPosted: Wed Mar 07, 2018 0:59    Post subject: IPV6 Setup Reply with quote
I have "Native IPV6 from ISP" but I cannot configure it... Help?

Actually I belive this is the option i should select because this is the only option that gives dd-wrt router an IPv6 Address.

My setup is:

ISP MODEM/router (pppoe) LAN -> WAN DDWRT router

I have a guest network on the ISP modem/router and my internal home network for the family members. Connecting thru ISP router, it provides an IPV6 address. But it does not provide when using ddwrt internal network.

When configuring it as Native IPv6 from ISP it gives ddwrt one ipv6 address. I used radvd as wiki suggests but after doing it, my devices get an valid Ipv6 address but does not connect to the internet.
On windows it does not show ipv6 DNS servers...and i dont know if the ipv6 gateway is a correct number.

Looking on the web i could not find much but i belive the issue is related with routing (br0, vlan2, etc...)

I did a "ip -6 addr show" and it only show ipv6 on vlan2. br0 dont have ipv6...

Any directions?

thanks!


EDIT: I have a /64 prefix
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Per Yngve Berg
DD-WRT Guru


Joined: 13 Aug 2013
Posts: 6858
Location: Romerike, Norway

PostPosted: Thu Aug 09, 2018 16:22    Post subject: Reply with quote
This is a late reply, but you have to get a prefix less than 64 on your main router.

With a 60 prefix, you can divide it into 16 /64 prefix for the various interfaces.

DHCP6C Custom:

interface eth0 {
send rapid-commit;
send ia-pd 1;
request domain-name-servers, domain-name;
};

id-assoc pd 1 {
prefix ::/60 infinity;
prefix-interface br0 {
sla-id 0;
sla-len 4;
};
prefix-interface ath1 {
sla-id 1;
sla-len 4;
};
prefix-interface eth1.3 {
sla-id 2;
sla-len 4;
};
};
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