Wr1500, Port wireless dsl/cable router – ParkerVision WR1500 User Manual

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WR1500

4-Port Wireless DSL/Cable Router

5.6

Multicast

Traditionally, IP packets are transmitted in one of either two ways -

Unicast (1 sender -1 recipient) or

Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to a group of hosts

on the network - not everybody and not just 1.

IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish membership

in a Multicast group - it is not used to carry user data.

IGMP version 2 (RFC 2236) is an improvement

over version 1 (RFC 1112) but IGMP version 1 is still in wide use. If you would like to read more

detailed information about interoperability between IGMP version 2 and version 1, please see sections

4 and 5 of RFC 2236.

The class D IP address is used to identify host groups and can be in the range 224.0.0.0 to

239.255.255.255. The address 224.0.0.0 is not assigned to any group and is used by IP multicast

computers. The address 224.0.0.1 is used for query messages and is assigned to the permanent

group of all IP hosts (including gateways).

All hosts must join the 224.0.0.1 group in order to participate in IGMP. The address 224.0.0.2 is

assigned to the multicast routers group.

The WR1500 Wireless Router supports both IGMP version 1 (IGMP-vl) and IGMP version 2

(IGMP-v2).

At start up, the WR1500 Wireless Router queries all directly connected networks to gather group

membership. After that, the WR1500 Wireless Router periodically updates this information. IP

multicasting can be enabled/disabled on the WR1500 Wireless Router LAN and/or WAN interfaces

in the Web Conﬁ guration Utility (LAN; WAN). Select

None to disable IP multicasting on these

interfaces.

5.7

Conﬁ guring the LAN IP Screens

Click

ADVANCED and then LAN to open the IP Screen.

This screen’s options are described on the next page.

Apply

Reset

DHCP Setup

LAN TCP/IP

Windows Networking (NetBIOS over TCP/IP)

DHCP Server

IP Pool Starting Address 192.168.1.33

Pool Size 8

DNS Servers Assigned by DHCP Server

First DNS Server
Second DNS Server
Third DNS Server

From ISP

0.0.0.0
0.0.0.0
0.0.0.0

IP Address
IP Subnet Mask
Multicast

192.168.1.1
255.255.255.0

None

Allow between LAN and WAN

LAN

From ISP
From ISP

RIP Direction
RIP Version

Both
RIP-1