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Chapter 5

IP Multicast in a WAN

IP Multicast WAN Configuration

IP Multicast WAN Configuration

The WAN topology, shown in Figure 5-1, is based on a dual-PVC Frame Relay model. The PVCs are not load-balanced. Preference is given to the PVC connected to “wanaggleft” by configuring the delay variable to influence the preference given by the IP Unicast routing protocol, EIGRP.

RP placement will occur on Layer 3 switches in the campus (in a server farm or core). RP resource requirements are discussed in Chapter 1, “IP Multicast Overview.”

Key IP addresses are listed in the diagram for reference. The “Corporate Network” cloud represents the campus as a whole. The example design uses the two core switches as the RPs. IP multicast configuration for the campus is covered in Chapter 2, “IP Multicast in a Campus Network.” In this chapter, a brief configuration for the campus RPs is shown for reference.

Figure 5-1

Multicast WAN Topology

IP/TV server

M

CallManager with MMoH

Key IP Addresses

HQ campus

6k-core-1

Corporate network

6k-core-2

Name

IP Address

IPTV server

10.5.11.20

CallManager 10.5.10.20 with MMoH

Primary PVC Secondary PVC

wanaggleft

F 5/0/0

S 0/0/0

L0

L0

L1

L1

IP WAN

F 0/0

Site

BW

Left

768K

Middle

256k

Right

128K

S 4/0

wanaggright

Branch sites

leftrtr

V

middlertr

V

rightrtr

V

dot1q trunk

dot1q trunk

dot1q trunk

left 3524

_

middle 3524

_

right_3524

IP IP

IP IP

IP IP

87040

Voice VLAN 120

IPTV Viewer Data VLAN 20

Voice VLAN 130

IPTV Viewer Data VLAN 30

Voice VLAN 140

IPTV Viewer Data VLAN 40

This section provides information and sample configurations for deploying the following IP multicast elements in a WAN:

Anycast RP IGMP Snooping and CGMP

Cisco AVVID Network Infrastructure IP Multicast Design

5-2

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