[OpenWrt-Devel] Recommended settings ip6 DNS server / dnsmasq

[Jean-Michel Pouré - GOOZE]

Le mardi 18 août 2015 à 18:30 +0200, Steven Barth a écrit :
> It is not possible, DHCPv6 doesn't carry routes. So you still need 
> RAs even with ra_management set to 2.


I spotted a problem with ra_management = 2
First configuration: stateful only configuration/sbin/route -A inet6 Table de routage IPv6 du noyauDestination                    Next Hop                   Flag Met Ref Use If2a01:e35:xxxx:xxxx::3/128      ::                         U    256 0     0 eth0fe80::/64                      ::                         U    256 1     4 eth0::/0                           ::                         !n   -1  1 11892 lo::1/128                        ::                         Un   0   11   101 lo2a01:e35:xxxx:xxxx::3/128      ::                         Un   0   1    15 lofe80::5642:49ff:xxxx:xxxx/128  ::                         Un   0   1    39 loff00::/8                       ::                         U    256 3     0 eth0::/0                           ::                         !n   -1  1 11892 lo
There is no unique gateway (no Next Hop for ::/0).The unique gateway should be the local address of the OpenWRT gateway.As a result, ping6 does not work (network unreachable).
Second configuration: static IPv6 configurationIf i set the IPv6 staticly with correct gateway, the routing table becomes:/sbin/route -A inet6 Table de routage IPv6 du noyauDestination                    Next Hop                   Flag Met Ref Use If2a01:e35:xxxx:xxxx::7/128      ::                         U    256 0     0 eth0fe80::ea94:f6ff:xxxx:xxxx/128  ::                         U    100 0     3 eth0fe80::/64                      ::                         U    256 0     0 eth0::/0                           fe80::ea94:f6ff:xxxx:xxxx  UG   100 7     0 eth0::/0                           ::                         !n   -1  1 11937 lo::1/128                        ::                         Un   0   11   107 lo2a01:e35:xxxx:xxxx::7/128      ::                         Un   0   1    38 lofe80::5642:49ff:xxxx:xxxx/128  ::                         Un   0   1     9 loff00::/8                       ::                         U    256 2     0 eth0::/0                           ::                         !n   -1  1 11937 lo
fe80::ea94:f6ff:xxxx:xxx is the correct UG. ping6 works.

To me, it seems that when using stateful only configuration, IPv6 gateway is not broadcasted. How can this be configured/fixed?
The best would be IMHO to broadcast IPv6 gateway along with dhcp:config host        option name 'sony-vaio'        option ip '192.168.1.xxx'        option mac '54:42:49:xx:xx:xx'        option duid '0004901071a15f278795aa0ddxxxxxxxxxxx'        option hostid '3'        => option gateway 'fe80::ea94:f6ff:xxxx:xxxx'???
What do you think? Do you know a workaround? Shall I open a bug/feature report?
Kind regards,Gnutella
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