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OpenWRT routers: Difference between revisions
Describe gotcha with multiple /64 blocks.
m (Mention that Technicolor's firmware is based on OpenWrt) |
(Describe gotcha with multiple /64 blocks.) |
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= Configuring the WAN interface to access AAISP =
== Multiple routed IPv6 /64 blocks ==
There's a gotcha for users who have multiple /64 blocks routed to them by AAISP. OpenWrt uses Policy-Based Routing (PBR) which allows routing to be configured according to multiple rules, not just be destination address.
If DHCPv6 is used to request Prefix Delegation (PD), AAISP reply with one /64 block. OpenWrt uses this to set the LAN address and netmask, and then enables routing from '''just this block''' from LAN to WAN. Any other /64 blocks routed to you won't be able to send packets to the Internet.
In my case, I have 2001:8b0:xxxx:4534::/64, ...:4535/64, ...:4536::/64 and ...:4536::/64 routed to me, but only ::4534 is routed back.
# ip -f inet6 route
default from 2001:8b0:xxxx:4534::/64 via fe80::203:97ff:feba:900 dev pppoe-wan metric 512
=== Solutions ===
I'm investigating the options:
* Configure manually, not using DHCPv6
* Configure automatically, adding missing routes
* See whether delegating a /60 is any better
= Enabling IPv6 in the local network =
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