ZyXEL P-1100 User Guide - Page 39

IP Multicast

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Prestige 1100 Internet Access Router Follow Table 3-2 to configure TCP/IP parameters for the Ethernet port. Table 3-2 TCP/IP Ethernet Setup Menu Fields Field Description Example TCP/IP Setup IP Address Enter the IP address of your Prestige 1100 in dotted decimal notation. 192.168.1.1 IP Subnet Mask Your Prestige 1100 will automatically calculate the subnet mask based on the IP address that you assign. Unless you are implementing subnetting, use the value computed by the Prestige 1100. 255.255.255.0 RIP Direction Press the space bar to select the RIP direction among [Both]/[In Only]/[Out Only]/[None] [Both] (default) Version Press the space bar to select the RIP version among [RIP-1]/[RIP2B]/[RIP-2M]. [RIP-1] (default) Multicast Turn on/off IGMP support and select the version from [IGMPv2]/[IGMP-v1]/[None]. This field is disabled if [DHCP= ]is set to [Client]. [IGMP-v2] IP Policies You can apply up to four IP Policy sets (from twelve) by entering their numbers separated by commas, e.g., 3, 4, 6, 11 SUA Press the space bar to select [Yes]to enable SUA on the Ethernet. [No] (default) When you have completed this menu, press [ENTER] at the prompt [Press ENTER to Confirm...] to save your configuration, or press [ESC] at any time to cancel. 3.4 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 to support multicast groups. The latest version is version 2 (see RFC2236). IP hosts use IGMP to report their multicast group membership to any immediate-neighbor multicast routers so the multicast routers can decide if a multicast packet needs to be forwarded. At start up, the Prestige queries all directly connected networks to gather group membership. After that, the Prestige updates the information by periodic queries. The Prestige implementation of IGMP Internet Access 3-5

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Prestige 1100 Internet Access Router
Internet Access
3-5
Follow Table 3-2 to configure TCP/IP parameters for the Ethernet port.
Table 3-2 TCP/IP Ethernet Setup Menu Fields
Field
Description
Example
TCP/IP Setup
IP Address
Enter the IP address of your Prestige 1100 in dotted decimal notation.
192.168.1.1
IP Subnet Mask
Your Prestige 1100 will automatically calculate the subnet mask based
on the IP address that you assign. Unless you are implementing
subnetting, use the value computed by the Prestige 1100.
255.255.255.0
RIP Direction
Press the space bar to select the RIP direction among [Both]/[In
Only]/[Out Only]/[None]
[Both]
(default)
Version
Press the space bar to select the RIP version among [RIP-1]/[RIP-
2B]/[RIP-2M].
[RIP-1]
(default)
Multicast
Turn on/off IGMP support and select the version from [IGMP-
v2]/[IGMP-v1]/[None]. This field is disabled if [DHCP= ]is set to [Client]
.
[IGMP-v2]
IP Policies
You can apply up to four IP Policy sets (from twelve) by entering their
numbers separated by commas, e.g., 3, 4, 6, 11
SUA
Press the space bar to select [Yes]to enable SUA on the Ethernet.
[No]
(default)
When you have completed this menu, press [ENTER] at the prompt [Press ENTER to Confirm…] to save
your configuration, or press [ESC] at any time to cancel.
3.4
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 to support multicast groups.
The latest
version is version 2 (see RFC2236). IP hosts use IGMP to report their multicast group membership to any
immediate-neighbor multicast routers so the multicast routers can decide if a multicast packet needs to be
forwarded.
At start up, the Prestige queries all directly connected networks to gather group membership.
After that, the Prestige updates the information by periodic queries.
The Prestige implementation of IGMP