olivierlambert/onlinenet_debian_ipv6.md

## onlinenet_debian_ipv6.md

      
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              onlinenet_debian_ipv6.md
            
          
    Online.net: IPv6 in Debian virtual machines

Without this annoying dribbler thing.
Variables


RANGE = /64
EXT_IF = external interface
IPV6 = Any IPv6 in RANGE
DUID = dhcp client id. Find it in console.online.net

Procedure

Add to /etc/network/interfaces

iface EXT_IF inet6 static
  address IPV6
  netmask 64
  accept_ra 1
  pre-up sleep 5 # because dhclient will fail if called too early
  # -1 parameter to avoid infinite fail
  pre-up dhclient -1 -cf /etc/dhcp/dhclient6.conf -pf /run/dhclient6.EXT_IF.pid -6 -P EXT_IF
  pre-down dhclient -x -pf /run/dhclient6.EXT_IF.pid

Create /etc/dhcp/dhclient6.conf

With a timeout to avoid infinite fail:
interface "EXT_IF" {
  send dhcp6.client-id DUID;
  request;
  timeout 10;
}

Apply

With networking restart: ifdown EXT_IF && ifup EXT_IF
Without:
sysctl net.ipv6.conf.EXT_IF.accept_ra=1
sysctl net.ipv6.conf.EXT_IF.autoconf=0
dhclient -cf /etc/dhcp/dhclient6.conf -pf /run/dhclient6.EXT_IF.pid -6 -P EXT_IF
ifconfig EXT_IF inet6 add IPV6/64

Bonus: add moar IPs

In /etc/network/interfaces, in the "iface EXT_IF inet6 static" section:
  up ifconfig eth0 inet6 add ANOTHER_IPV6/64
  down ifconfig eth0 inet6 del ANOTHER_IPV6/64

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