IP Multicast in a Campus Network
IP Multicast Small Campus Design
Small Campus Design Reference Diagram
VLAN 2 data VLAN 12 voice
VLAN 3 data VLAN 13 voice
Data and voice VLAN trunks
Backbone layer (collapsed core- distribution)
Layer 3 interfaces HSRP 10.1.vlan.1 Standby10.1.vlan.2 Active 10.1.vlan.3
Server farm layer
CallManager with MoH
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