user manual

7-32 Administrator’s Handbook

4. Toggle or enter any IP parameters you require and return to the Add Connection Proﬁle screen by pressing

Escape. For more information on NAT, see “Multi-NAT,” beginning on page 4-1.

The Local WAN IP Address is displayed for numbered or NAT proﬁles. The Local WAN IP Mask is displayed

for numbered proﬁles. The Remote IP Address and Remote IP Mask are displayed for unnumbered proﬁles.

5. Select ADD PROFILE NOW and press Return. Your new connection proﬁle will be added.

If you want to view the connection proﬁles in your gateway, return to the WAN Conﬁguration screen, and

select Display/Change Connection Proﬁle. The list of connection proﬁles is displayed in a scrolling pop-up

screen.

Multicast Forwarding

Multicasting is a method for transmitting large amounts of information to many, but not all, computers over an

Internet. One common use is to distribute real time audio and video to the set of computers which have joined

a distributed conference.

Multicasting is similar to radio or TV broadcasts in the sense that only those who have tuned in to a particular

frequency receive the information. You see and hear the channel you are interested in, but not the others.

Since a router should not be used as a passive forwarding device, Motorola Netopia

Routers use a protocol for

forwarding multicasting. This protocol is Internet Group Management Protocol (IGMP). Motorola Netopia

Routers can use either IGMP Version 1, Version 2, or Version 3, however, Multicast For warding will only work if

your service provider suppor ts it. Check with your service provider. IGMP forwarding is enabled per IP Proﬁle

and WAN Connection Proﬁle.

You conﬁgure Multicast For warding in two Telnet menu screens:

• First, you enable Multicast Forwarding in the IP Setup screen in the System Conﬁguration menu,

WAN Configuration

+-Profile Name---------------------IP Address------+

+--------------------------------------------------+

| Easy Setup Profile 127.0.0.2 |

| Profile 1 0.0.0.0 |

| |

| |on: Yes

| |

+--------------------------------------------------+

Up/Down Arrow Keys to select, ESC to dismiss, Return/Enter to Edit.