How do I set the prefixlen for an IPv6 address under FreeBSD operating systems?
You can set the prefixlen for an IPv6 address by editing /etc/rc.conf file, enter:
# vi /etc/rc.conf
Assuming that your IPv6 is address is 2001:48c8:7::2 for em0, enter:
ipv6_ifconfig_em0="2001:48c8:7::2 prefix 64"
Save and close the file. Restart networking. You can also set it at the shell prompt using the ifconfig command as follows:
ifconfig interFace inet6 ipv6IpAddress prefixlen Value ifconfig fxp0 inet6 2001:48c8:7::2 prefixlen 64
Where,
- fxp0 or em0 - FreeBSD NIC interface name
- 2001:48c8:7::2 - IPv6 public IP address
- 64 - IPv6 Prefixlen Value
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