IP multicasting provides services such as the delivery of information to multiple destinations with a single transmission and the solicitation of servers by clients. These services benefit applications such as video conferencing, dissemination of datagram information, and dissemination of mail or news to a large number of recipients.

The Passport switch supports two protocols for IP multicasting:

1. Distance Vector Multicast Routing Protocol (DVMRP)

2. Internet Group Management Protocol (IGMP)

The following sections describe how to use Passport Device Manager to set up IP Multicast features:

• Configuring DVMRP
• Configuring L3 IGMP

Device Manager allows you to view and modify Multicast parameters through the following management windows:

• DVMRP dialog box
• IGMP dialog box
• Multicast dialog box

• For procedures for setting IGMP snooping, refer to the information about working with VLANs in <Italic>Reference for Passport Management Software Switching Operations.