IPv6 configuration with prefixlen != 64

cmeerw · Jul 20, 2010

Is there a way to configure the prefixlen for an IPv6 address (in /etc/rc.conf)?

Currently, I have set ipv6_enable, ipv6_ifconfig_re0 and ipv6_defaultrouter in /etc/rc.conf which appears to work to some extent except that the prefixlen appears to be set (hardcoded?) to 64, but I would like the prefixlen to be 80. Is there a way to configure the prefixlen (and what would be the best way)?

vivek · Jul 20, 2010

Try in rc.conf

Code:

ipv6_ifconfig_em0="2001:470:1e04:5ea::10 prefix 80"

Or at shell:

Code:

 ifconfig em0 inet6 001:470:1e04:5ea::10 prefixlen 80

Replace em0 and ips with your actual setup.
Ref:

IPv6 configuration with prefixlen != 64

cmeerw

vivek