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Chapter 2

956651

IP Multicast in a Campus Network

IP Multicast Small Campus Design

Figure 2-5

Small Campus Design Reference Diagram

Access layer

VLAN 2 data VLAN 12 voice

VLAN 3 data VLAN 13 voice

3550-left-access

3524-right-access

Data and voice VLAN trunks

Backbone layer (collapsed core- distribution)

4kS3-left-BB

Layer 3

4kS3-right-BB

Layer 3 interfaces HSRP 10.1.vlan.1 Standby10.1.vlan.2 Active 10.1.vlan.3

Server farm layer

3550-left-SF

3550-right-SF

Data Center

VLAN 10

VLAN 11

76645

CallManager with MoH

IPTV server

In this design:

Both IGMP snooping and CGMP are used. There is a Catalyst 3550 (IGMP snooping) and a Catalyst 3524-PWR (CGMP) in the access layer.

There are two Catalyst 4006 switches with Supervisor III in the collapsed core/distribution layer. The access-layer switches rely on the backbone switches as the RPs for PIM-SM.

Based on the size of the network and the number of sources and receivers that will be active on the network, there is no need for an advanced multicast deployment model. PIM-SIM is used on the two backbone switches to provide multicast forwarding between the Layer 3 links/VLANs in this design. Auto-RP is used to distribute group-to-RP mapping information. Additionally, simple security features are implemented to secure the network from unauthorized sources and RPs.

Cisco AVVID Network Infrastructure IP Multicast Design

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