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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!

OpenWRT routers: Difference between revisions

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Adsb (talk | contribs)
Describe gotcha with multiple /64 blocks.
Adsb (talk | contribs)
Add detail
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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.
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.
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
# ip -f inet6 route
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I'm investigating the options:
I'm investigating the options:


* Configure manually, not using DHCPv6
* Configure IPv6 on the WAN manually, not using DHCPv6


* Configure automatically, adding missing routes
* Configure automatically with DHCPv6, and add the missing route(s)


* See whether delegating a /60 is any better
* See whether delegating a /60 is any better - does DHCPv6 PD reply with the /60 or just one /64 ?


= Enabling IPv6 in the local network =
= Enabling IPv6 in the local network =