ZyXEL Communications P-2302HW User Manual

 

All contents copyright (c) 2005 ZyXEL Communications Corporation.   

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What is IP Multicast ? 

Traditionally, IP packets are transmitted in two ways - unicast or broadcast. Multicast is a third way to 

deliver IP packets to a group of hosts. Host groups are identified by class D IP addresses, i.e., those with 

"1110" as their higher-order bits. In dotted decimal notation, host group addresses range from 224.0.0.0 to 

239.255.255.255. Among them, 224.0.0.1 is assigned to the permanent IP hosts group, and 224.0.0.2 is 

assigned to the multicast routers group.   

IGMP  (Internet  Group  Management  Protocol)  is  the  protocol  used  for  multicasting.  There  are  currently  two 

versions: versions 1 and 2. Through IGMP, IP hosts are able to report their multicast group membership to any 

immediate-neighbor multicast routers which decide if a multicast packet needs to be forwarded.   

At start up, the Prestige queries all directly connected networks to gather group membership information. The 

Prestige then updates the information through periodic queries.   

The Prestige supports IGMP versions 1 and 2. You can enable/disable multicast setting on the Ethernet interface 

or to the remote node.   

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IP Multicast Setup 

Enable IGMP on the Prestige's LAN interface in menu 3.2:   

 

                              Menu 3.2 - TCP/IP and DHCP Ethernet Setup 

     DHCP= Server                           TCP/IP Setup: 

     Client IP Pool: 

       Starting Address= 192.168.1.33       IP Address= 192.168.1.1 

       Size of Client IP Pool= 32           IP Subnet Mask= 255.255.255.0 

     First DNS Server= From ISP             RIP Direction= Both 

       IP Address= N/A                        Version= RIP-1 

     Second DNS Server= From ISP            Multicast= 

IGMP-v2