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ISC DHCP supports IPv6 since version 4.x.
Note that currently, the ISC DHCP server can only serve IPv4 or IPv6, means you have to start the daemon twice (for IPv6 with option ”-6”) to support both protocols.
Create a dedicated configuration file /etc/dhcp/dhcpd6.conf for the IPv6 part of the dhcpd. Note, that the router requires to have a interface configured with an IPv6 address out of the defined subnet.
default-lease-time 600;
max-lease-time 7200;
log-facility local7;
subnet6 2001:db8:0:1::/64 {
# Range for clients
range6 2001:db8:0:1::129 2001:db8:0:1::254;
# Range for clients requesting a temporary address
range6 2001:db8:0:1::/64 temporary;
# Additional options
option dhcp6.name-servers fec0:0:0:1::1;
option dhcp6.domain-search "domain.example";
# Prefix range for delegation to sub-routers
prefix6 2001:db8:0:100:: 2001:db8:0:f00:: /56;
# Example for a fixed host address
host specialclient {
host-identifier option dhcp6.client-id 00:01:00:01:4a:1f:ba:e3:60:b9:1f:01:23:45;
fixed-address6 2001:db8:0:1::127;
}
} |
Note that the ”dhcp.client-id” no longer belongs to a MAC address, an unique ID is used instead! ”dhcp6c” (see above) uses the file /var/lib/dhcpv6/dhcp6c_duid (would be created during first start, if not existing) as unique identity. It's a 14 byte long identifier, starting with a 2 byte length information (usually ”0x000e”):
# hexdump -e '"%07.7_ax " 1/2 "%04x" " " 14/1 "%02x:" "\n"' /var/lib/dhcpv6/dhcp6c_duid 0000000 000e 00:01:00:01:4a:1f:ba:e3:60:b9:1f:01:23:45: |
Start server in foreground:
# /usr/sbin/dhcpd -6 -d -cf /etc/dhcp/dhcpd6.conf eth1 Internet Systems Consortium DHCP Server 4.1.0 Copyright 2004-2008 Internet Systems Consortium. All rights reserved. For info, please visit http://www.isc.org/sw/dhcp/ Not searching LDAP since ldap-server, ldap-port and ldap-base-dn were not specified in the config file Wrote 0 leases to leases file. Bound to *:547 Listening on Socket/5/eth1/2001:db8:0:1::/64 Sending on Socket/5/eth1/2001:db8:0:1::/64 |
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