User's Manual

If the DHCPv6 server is configured with the SIP proxy IPv4–mapped address, the IP
Deskphone registers with its IPv4 address. If the DHCPv6 server is configured with the SIP
proxy IPv4-mapped and IPv6 addresses, the DHCPv6 client calls the destination address
selection algorithm and selects the address based on the configured preference. If
PREFER_IPV6 is configured to YES, the IP Deskphone selects the IPv6 address of the highest
precedence.
Server specifications
All servers in a network can be IPv4 mode, IPv4/IPv6 dual mode, or IPv6 mode.
When the IP Deskphone is configured to operate in dual mode, DHCPv4 or DHCPv6, or a dual
mode DHCP server must be available, otherwise the IP Deskphone does not boot up.
Internet Control Message Protocol for IPv6
Internet Control Message Protocol for IPv6 (ICMPv6) is a required IPv6 standard defined by
RFC 4443.
With ICMPv6, hosts and routers that use IPv6 communication can report errors encountered
in processing packets and send simple echo messages for diagnostics.
ICMPv6 provides the framework for the following:
• • Neighbor Discovery as defined by RFC 2461
• • Multicast Listener Discovery (MLD) as defined by RFC 2710
Configuring the DHCP server
The DHCPv4 and DHCPv6 servers must be installed to run on the same box. If Dibbler
DHCPv6 server is used, go to
http://klub.com.pl/dhcpv6 for installation guidelines.
To stop and start the DHCPv6 server, use the following:
/etc/init.d/dibbler-server run /* prints all server debug messages*/
/etc/init.d/dibbler-server start
/etc/init.d/dibbler-server stop
/etc/init.d/dibbler-server status
The configuration file is located at: /etc/dibbler/server.conf.
Internet Control Message Protocol for IPv6
SIP Software for Avaya 1100 Series IP Deskphones-Administration November 2012 307