interface not getting address when net.ipv6.conf.all.forwarding is 1

[Folkert van Heusden <folkert@vanheusden.com>]

Hi,

Situation:
- couple of debian systems interconnected using a vpn (tinc)
- ipv6 is routed over the vpn
- all systems but one get an ipv6 address sent by radvd on the server
- the problem system ('thegate') ONLY gets an address if
  net.ipv6.conf.all.forwarding is set to 0, as soon as it is set to 1
  (and the vpn is restarted of course), then the interface does not get
  an address

kernel of problematic system: 2.6.32-3-686-bigmem
radvd on server: 1:1.6-1

radvd configuration on server ('fvhglobalnet' is the network device(!)):

interface fvhglobalnet {
        AdvSendAdvert on;
        AdvHomeAgentFlag off;
        MaxRtrAdvInterval 30;
        
        prefix 2001:888:13b3:172::/64 {
                AdvOnLink on;
                AdvAutonomous on;
                AdvRouterAddr on;
        };
};

Anyone got an idea what is going wrong?


Folkert van Heusden

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