ipv6 route configuration

ipv6 route configuration

[Mohan Lal Jangir]

[foo:/root] route -A inet6 add 2::/64 gw 2::1 dev eth5
SIOCADDRT: Invalid argument
[foo:/root] 

Could someone please tell why route addition tells invalid argument ?

Gateway 2::1 is reachable.

[foo:/root] ping6 2::1
PING 2::1(2::1) 56 data bytes
64 bytes from 2::1: icmp_seq=0 ttl=64 time=0.755 ms
64 bytes from 2::1: icmp_seq=1 ttl=64 time=0.395 ms
 
--- 2::1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1012ms
rtt min/avg/max/mdev = 0.395/0.575/0.755/0.180 ms, pipe 2

Thanks
-Mohan

Re: ipv6 route configuration

[Brian Haley]

Mohan Lal Jangir wrote:
> [foo:/root] route -A inet6 add 2::/64 gw 2::1 dev eth5
> SIOCADDRT: Invalid argument
> [foo:/root]
> Could someone please tell why route addition tells invalid argument ?

Because 2::1 is in the reserved address space (see 
http://www.iana.org/assignments/ipv6-address-space) and the kernel needs 
to have a unicast address for the gateway.  You could try using the 
link-local address (which is preferred) for that system instead.  Or use 
a real global prefix or generate a ULA.

-Brian