is a portable implementation of the DHCPv6 relay. DHCPv6 relays are
proxies, which allow one server to support links, which server is not
directly connected to. There are ports available for Linux 2.4/2.6 systems
as well as MS Windows XP and 2003. They are freely available under
version 2 (or later) license.
[ run | start | stop | status ]
- starts relay in the console. Relay can be closed using ctrl-c.
- starts relay in daemon mode.
- stops running relay.
- shows status of the relay.
Relay forwards DHCPv6 messages between interfaces. Messages from
client are encapsulated and forwarded as RELAY_FORW messages. Replies
from server are received as RELAY_REPL message. After decapsulation,
they are being sent back to clients.
It is vital to inform server, where this relayed message was
received. DHCPv6 does this using interface-id option. This identifier
must be unique. Otherwise relays will get confused when they will
receive reply from server. Note that this id does not need to be
alligned with system interface id (ifindex). Think about it as
"ethernet segment identifier" if you are using Ethernet network or as
"bss identifier" if you are using 802.11 network.
Let's assume this case: relay has 2 interfaces: eth0 and
eth1. Clients are located on the eth1 network. Relay should receive
data on that interface using well-known ALL_DHCP_RELAYS_AND_SERVER
multicast address (ff02::1:2). Relay also listens on its global
address 2000::123. Packets received on the eth1 should be forwarded on
the eth0 interface, also using multicast address:
Here is another exmaple. This time messages should be forwarded from
eth1 and eth3 to the eth0 interface (using multicast) and to the eth2
interface (using server's global address 2000::546). Also clients must
use multicasts (the default approach):
Dibbler was developed as master thesis on the Technical University of
Gdansk by Tomasz Mrugalski and Marek Senderski. Currently Marek has
not enough free time, so this project is being developed by Tomasz
Mrugalski. Author can be reached at firstname.lastname@example.org.
There are dibbler-server(8) and dibbler-client(8) manual pages available. You are
also advised to take a look at project website located at
As far as authors know, this is the only Windows DHCPv6 stateful
implementation available and the only one with relay support. It is
also one of two freely available under Linux. The other Linux
implementation is available at
but it is rather outdated and seems not being actively developed.