配置如下:
Enable PIM sparse mode (PIM-SM) on OSPF Area 0 and Area 142 according to the following requirements.: 􀁺 There is a multicast source on VLAN 44 and clients are located on the BB3 subnets (150.3.YY.0/24) 􀁺 Use a non-proprietary dynamic method of learning the Rendezvous Point (RP) 􀁺 Ensure that R1-Lo0 is the preferred RP but that R2-Lo0 is able to take over in case R1 goes down 􀁺 Simulate that clients have sent requests to join the multicast group 239.YY.YY.1 and ensure they replay to pings from R4 fa0/0 (join Vlan33 to group) Step1 R4(config)#ip multicast-routing R4(config)#int f0/0 R4(config-if)#ip pim sparse-mode R4(config)#int f0/1 R4(config-if)#ip pim sparse-mode R4(config)#int s0/0/0 R4(config-if)#ip pim sparse-mode R4(config)#int s0/0/1 R4(config-if)#ip pim sparse-mode R1(config)#ip multicast-routing R1(config)#int f0/0 R1(config-if)#ip pim sparse-mode R1(config)#int s0/1/0 R1(config-if)#ip pim sparse-mode R2(config)#ip multicast-routing R2(config)#int f0/0 R2(config-if)#ip pim sparse-mode R2(config)#int s0/3/0 R2(config-if)#ip pim sparse-mode SW1(config)#ip multicast-routing distributed SW1 (config)#int f0/1 SW1 (config-if)#ip pim sparse-mode SW1 (config)#int vlan 123 SW1 (config-if)#ip pim sparse-mode SW4(config)#ip multicast-routing Step2 R1(config)#int lo0 R1(config-if)#ip pim sparse-mode R1(config)#ip pim rp-candidate lo0 R2(config)#int lo0 R2(config-if)#ip pim sparse-mode R2(config)#ip pim rp-candidate lo0 priority 100 R2(config)#ip pim bsr-candidate lo0 SW2(config)#int vlan 33 SW2(config-if)#ip igmp join-group 239.YY.YY.1 distributed SW4 (config)#int vlan 42 SW4 (config-if)#ip pim sparse-mode SW4 (config)#int vlan 123 SW4 (config-if)#ip pim sparse-mode SW2(config)#ip multicast-routing distributed SW2 (config)#int vlan 33 SW2 (config-if)#ip pim sparse-mode SW2 (config)#int vlan 123 SW2 (config-if)#ip pim sparse-mode SW3(config)#ip multicast-routing distributed SW3 (config)#int vlan 123 SW3 (config-if)#ip pim sparse-mode
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