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Chapter 2

IP Multicast in a Campus Network

IP Multicast Small Campus Design

Core/Distribution-Layer Switch Configuration

The following example shows the configuration of “4kS3-left-BB.” This switch is configured for Auto-RP and is the HSRP standby device.

Enables IP multicast routing globally. Creates interface used for RP and Mapping Agent operation. ip multicast-routing interface Loopback0 description Interface used for RP/MA ip address 1.1.1.1 255.255.255.255 ip pim sparse-dense-mode ! interface Vlan2 description Data VLAN 2 ip address 10.1.2.2 255.255.255.0 ip pim sparse-dense-mode standby 2 ip 10.1.2.1 standby 2 priority 110 preempt Enables sparse-dense mode on each interface. Because priority 110 is less than 120 (on the right switch), this device will be the HSRP standby. ! ! interface Vlan3 description Data VLAN 3 ip address 10.1.3.2 255.255.25 ip pim sparse-dense-mode standby 3 ip 10.1.3.1 standby 3 priority 110 preempt ip cgmp ! interface Vlan10 description Server Farm VLAN 1 ip address 10.1.10.2 255.255.2 ip pim sparse-dense-mode standby 10 ip 10.1.10.1 standby 10 priority 110 preemp ! interface Vlan11 description Server Farm VLAN 1 ip address 10.1.11.2 255.255.2 ip pim sparse-dense-mode standby 11 ip 10.1.11.1 standby 11 priority 110 preemp ! interface Vlan12 description Voice VLAN 12 ip address 10.1.12.2 255.255.2 ip pim sparse-dense-mode standby 12 ip 10.1.12.1 standby 12 priority 110 preemp ! interface Vlan13 description Voice VLAN 13 ip address 10.1.13.2 255.255.2 ip pim sparse-dense-mode standby 13 10.1.13.1 standby 13 priority 110 preemp ip cgmp ! ip pim send-rp-announce Loopbac VLAN 3 connects to 3524-right-access, which supports only CGMP. 5.0 Enables CGMP Server. 0 - MOH 55.0 t 1 - IP/TV 55.0 t 55.0 t VLAN 13 connects to 3524-right-access, which supports only CGMP. 55.0 t Enables CGMP Server. Sends an Auto-RP announcement k0 scope 16 group-list 1

! ip pim send-rp-discovery Loopback0 scope 16 !

message to the 224.0.1.39 group. Sends an Auto-RP announcement message to the 224.0.1.40 group.

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