3Com 5500 Requirement Analysis, Mode may vary depending on user requirements, Configuration Plan

148CHAPTER 16: MULTICAST CONFIGURATION GUIDE

Networking and	Requirement Analysis
Configuration	When users receive VOD information through multicast, the information receiving
Requirements
	mode may vary depending on user requirements:

1To avoid flooding of the video information at Layer 2, IGMP Snooping needs to be enabled on Switch E, through which Host A and Host B receive the multicast data.

2To ensure reliable and stable reception of multicast data, Switch B and Switch C provide link backup for the directly attached stub network N1, which comprises multicast receivers Host C and Host D.

3The PIM-SM domain as a single-BSR domain, and OSPF runs in the domain for unicast routing.

Configuration Plan

1Switch D connects to the network that comprises the multicast source (Source) through VLAN-interface 300.

2Switch A connects to Switch F through VLAN-interface 100, and to Switch D and Switch E through VLAN-interface 101 and VLAN-interface 102 respectively.

3Switch B and Switch C connect to stub network N1 through their respective VLAN-interface 200, and to Switch E through VLAN-interface 103 and VLAN-interface 104 respectively.

4Both VLAN-interface 105 of Switch D and VLAN-interface 102 of Switch E serve as C-BSRs and C-RPs.

5Enable IGMPv2 on VLAN-interface 100 of Switch A. On Switch F, enable IGMP Snooping globally and in VLAN 100. Run IGMPv2 on Switch B and Switch C for group management on stub network N1. Typically, Switch B acts as the querier because its interface on the multi-access subnet has a lower IP address.

Application Product

Matrix	Product series	Software version	Hardware version
	Switch 5500	Release V03.02.04	All versions
	Switch 5500G	Release V03.02.04	All versions

Configuration Procedure Configuring the interface IP addresses and unicast routing protocol for each switch

Configure the IP address and subnet mask for each interface as per Figure 39. The detailed configuration steps are omitted here.

Configure OSPF for interoperation among the switches in the PIM-SM domain. Ensure the network-layer interoperation among Switch A, Switch B, Switch C, Switch D and Switch E in the PIM-SM domain and enable dynamic update of routing information among the switches through a unicast routing protocol. The specific configuration steps are omitted here.

Configuring multicast protocols

#Enable IP multicast routing on Switch A, enable PIM-SM on each interface, and run IGMPv2 on VLAN-interface 100.

<SwitchA> system-view

[SwitchA] multicast routing-enable

[SwitchA] interface Vlan-interface 100