IPv6 : ipv6calc

[ what’s ipv6calc ? ]

ipv6calc is a tool that manipulates IPv6 addresses.
It’s very useful tool for me to understand IPv6 ‘cause I’m newbie to IPv6 :)

[ how to install ipv6calc ]

- ubuntu 11.04

# apt-get install ipv6calc

- CnetOS 5.6

# yum install ipv6calc.x86_64

[ how to use ]

The following is my IPv6 local link address.

# LANG=C ifconfig br0 | grep inet6 | grep -i link       inet6 addr: fe80::226:55ff:fee1:e83a/64 Scope:Link

# ipv6calc --addr_to_uncompressed fe80::226:55ff:fee1:e83a fe80:0:0:0:226:55ff:fee1:e83a

- generate EUI-64 address w/ ipv6calc

You can generate unique IPv6 address based on Hardware address.

ipv6calc --in prefix+mac --action prefixmac2ipv6 --out ipv6addr fe80::/64 00:26:55:e1:e8:3a fe80::226:55ff:fee1:e83a/64

- show detailed info of an IPv6 address

# ipv6calc --showinfo -m fe80::226:55ff:fee1:e83a No input type specified, try autodetection...found type: ipv6addr No output type specified, try autodetection...found type: ipv6addr IPV6=fe80:0000:0000:0000:0226:55ff:fee1:e83a TYPE=unicast,link-local IPV6_REGISTRY=reserved IID=0226:55ff:fee1:e83a  <- interface ID EUI48=00:26:55:e1:e8:3a <- Hardware address EUI48_SCOPE=global EUI48_TYPE=unicast OUI="Hewlett Packard" IPV6CALC_NAME=ipv6calc IPV6CALC_VERSION=0.73.0 IPV6CALC_COPYRIGHT="(P) & (C) 2001-2008 by Peter Bieringer <pb (at) bieringer.de>" IPV6CALC_OUTPUT_VERSION=4

generate an IPv6 address from an IPv4

# ipv6calc --ipv4_to_6to4addr 192.168.10.11 2002:c0a8:a0b:: # # ipv6calc --showinfo -m 2002:c0a8:a0b:: No input type specified, try autodetection...found type: ipv6addr No output type specified, try autodetection...found type: ipv6addr IPV6=2002:c0a8:0a0b:0000:0000:0000:0000:0000 TYPE=unicast,6to4,global-unicast,productive IPV4_SOURCE[192.168.10.11]=6TO4 IPV4[192.168.10.11]=192.168.10.11 IPV4_REGISTRY[192.168.10.11]=reserved(RFC1918) SLA=0000 IID=0000:0000:0000:0000 EUI64_SCOPE=local IPV6CALC_NAME=ipv6calc IPV6CALC_VERSION=0.73.0 IPV6CALC_COPYRIGHT="(P) & (C) 2001-2008 by Peter Bieringer <pb (at) bieringer.de>" IPV6CALC_OUTPUT_VERSION=4

[ how to assign a fixed IPv6 address ]

- prepare IPv6 address

prefix is fe80:123:456:1 ( /64 )
create interface ID based on MAC address.

# ipv6calc --in prefix+mac --action prefixmac2ipv6 --out ipv6addr fe80:123:456:1::/64 00:26:55:e1:e8:3a fe80:123:456:1:226:55ff:fee1:e83a/64

# ipv6calc --showinfo -m fe80:123:456:1:226:55ff:fee1:e83a No input type specified, try autodetection...found type: ipv6addr No output type specified, try autodetection...found type: ipv6addr IPV6=fe80:0123:0456:0001:0226:55ff:fee1:e83a TYPE=unicast,link-local IPV6_REGISTRY=reserved IID=0226:55ff:fee1:e83a EUI48=00:26:55:e1:e8:3a EUI48_SCOPE=global EUI48_TYPE=unicast IPV6CALC_NAME=ipv6calc IPV6CALC_VERSION=0.61.0 IPV6CALC_COPYRIGHT="(P) & (C) 2001-2006 by Peter Bieringer <pb (at) bieringer.de>" IPV6CALC_OUTPUT_VERSION=3

assign IPv6 temporally

# ifconfig eth2 add fe80:0123:0456:0001:0226:55ff:fee1:e83a/64

# ifconfig eth2 | grep inet6 | egrep "fe80:123"       inet6 addr: fe80:123:456:1:226:55ff:fee1:e83a/64 Scope:Link

assign IPv6 permanently

- CentOS

edit /etc/sysconfig/network-scripts/ifcfg-ethX file like this:

IPV6INIT=yes IPV6ADDR=fe80:0123:0456:0001:0226:55ff:fee1:e83a/64 IPV6_DEFAULTGW=fe80:0123:0456:0001:0226:55ff:fee1:e83b

n’ then restart network scripts of ifdown ethX ; ifup ethX

# /etc/init.d/network restart or # ifdown ethX; ifup ethX

- Ubuntu

edit /etc/network/interfaces file

auto br0 iface br0 inet static     address 192.168.10.14     netmask 255.255.255.0     network 192.168.10.0     gateway 192.168.10.254     bridge_ports eth2     bridge_stp off     bridge_fd 0     bridge_maxwait 0 iface br0 inet6 static     pre-up modprobe ipv6     address fe80:0123:0456:0001:0226:55ff:fee1:e83a     netmask 64    gateway fe80:0123:0456:0001:0226:55ff:fee1:e83b

restart network script

# /etc/init.d/networking restart