Instructions

38
Gigabit Ethernet PoE+ Web-Managed AV SwitchUser Manual
CLUSTER CONFIGURATION
Neighbor Discovery Protocol (NDP) is an important protocol in IPv6. NDP is based on ICMPv6 and is used
to identify the relationships between different neighboring devices in an IPv6 network. Many important
functions of IPv6 such as resolving MAC address of an IPv6 Address (in IPv4, ARP is used for this), Router
Discovery etc., are now performed using Neighbor Discovery Protocol (NDP).
The following are the important functions of Neighbor Discovery Protocol (NDP):
• Discovering Routers Dynamically: NDP is used to automatically discover routers in
an IPv6 network using Router Solicitation & Router Advertisement messages.
• Discovering Network Prexes Dynamically: NDP is used to automatically discover IPv6 network
prexes where the host belongs to, by using Router Solicitation & Router Advertisement messages.
• Resolving MAC address dynamically: We use IP addresses for communication but the
addresses which are used by the LAN Switches for delivery of Ethernet frames to the destination
devices are MAC addresses. In IPv4, Address Resolution Protocol (ARP) is used for resolving
IPv4 address to MAC address. The role of ARP in IPv4 is performed by NDP in IPv6.
• Autoconguration of IPv6 addresses: After learning IPv6 network prexes using NDP
Router Solicitation & Router Advertisement messages, IPv6 devices can autocongure an IPv6
address by self-generating the host part of the IPv6 address by using EUI-64 method.
• DAD (Duplicate Address Detection): DAD is an NDP mechanism to detect
whether duplicate IPv6 addresses exist in an IPv6 network. DAD is useful
because IPv6 has many address autoconguration mechanisms.
NDP CONFIGURATION
The following image shows the NDP configuration page.
• The congurable information includes:
• Selecting the port (for port selection, select the port as required, and enable the port NDP function)
• Enabling the NDP function of the port For NDP (both global and port NDP must be enabled)
• Enabling the global NDP function (both global and port NDP must be enabled)
• Entering the interval for sending NDP packets (the valid time range
is 1-4096 seconds; the default value is 180 seconds)
• Entering the aging time of the NDP packets on the receiving device (the
valid time range is 1-4096 seconds, and the default is 60 seconds)