Specifications

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Configuring Multicast

April 16, 2009 Page 29 of 32

Router R3 Configuration

Onthisrouter,PIM‐SMisenabledonallinterfaces.VLAN10isconfiguredasabackupcandidate

BSR,byleavingitspriorityatthedefaultof0.

VLAN10isalsoconfiguredasabackupcandidateRPformulticastgroup224.2.2.0/24,by setting

itspriorityvalueslightlyhigher(3)than

thepriorityconfiguredonR2forthesamegroup(2)

(sincetheC‐RPwiththe smallestpriorityvalueiselected).

R3>Router(config)#router id 1.1.1.3

R3>Router(config)#interface vlan 4

R3>Router(config-if(Vlan 4))#ip address 172.1.3.3 255.255.255.0

R3>Router(config-if(Vlan 4))#no shutdown

R3>Router(config-if(Vlan 4))#ip pim sparse-mode

R3>Router(config-if(Vlan 4))#exit

R3>Router(config)# interface vlan 8

R3>Router(config-if(Vlan 8))#ip address 172.2.3.3 255.255.255.0

R3>Router(config-if(Vlan 8))#no shutdown

R3>Router(config-if(Vlan 8))#ip pim sparse-mode

R3>Router(config-if(Vlan 8))#exit

R3>Router(config)#interface vlan 10

R3>Router(config-if(Vlan 10))#ip address 172.3.3.3 255.255.255.0

R3>Router(config-if(Vlan 10))#no shutdown

R3>Router(config-if(Vlan 10))#ip pim bsr-candidate vlan 10

R3>Router(config-if(Vlan 10))#ip pim sparse-mode

R3>Router(config-if(Vlan 10))#exit

R3>Router(config)#ip pim rp-candidate 172.3.3.3 224.2.2.0 255.255.255.0 priority

R3>Router(config)#interface vlan 6

R3>Router(config-if(Vlan 6))#ip address 172.3.4.3 255.255.255.0

R3>Router(config-if(Vlan 6))#no shutdown

R3>Router(config-if(Vlan 6))#ip pim sparse-mode

R3>Router(config-if(Vlan 6))#exit

Router R4 Configuration

ThisrouterdoesnotplayanyspecialroleinPIM‐SM,exceptthatithashostsdirectlyconnectedto

it.IGMPisenabledontheinterfacethatconnectstohostsandPIM‐SMisenabledonallinterfaces.

R4>Router(router-config)#router id 1.1.1.4

R4>Router(config)#interface vlan 5

R4>Router(config-if(Vlan 5))#ip address 172.2.4.4 255.255.255.0

R4>Router(config-if(Vlan 5))#no shutdown

R4>Router(config-if(Vlan 5))#ip pim sparse-mode

R4>Router(config-if(Vlan 5))#exit

R4>Router(config)#interface vlan 6

R4>Router(config-if(Vlan 6))#ip address 172.3.4.4 255.255.255.0

R4>Router(config-if(Vlan 6))#no shutdown

R4>Router(config-if(Vlan 6))#ip pim sparse-mode

R4>Router(config-if(Vlan 6))#exit