Section 8: Multicast (6 Points)

• Configure Multicast PIM Sparse-mode on VLAN_22 to allow Multicast traffic between R3, R5, and R6. Make R6 the rendezvous point. Make this a static configuration.

If you configured this correctly as shown in Example 6-50, you have scored 3 points.

Example 6-50. R3, R5, and R6 Multicast Configuration

 R3#show run Building configuration... ! ip multicast-routing ! interface FastEthernet0/0  ip address 160.10.22.3 255.255.255.0  ip pim sparse-mode ! ip pim rp-address 160.10.22.6 ! R3# ! ________________________________________________________________ R5#show run Building configuration... ! ip multicast-routing ! interface FastEthernet0/0  ip address 160.10.22.5 255.255.255.0  ip pim sparse-mode ! ip pim rp-address 160.10.22.6 ! R5# ! ! ________________________________________________________________ R6#show run Building configuration... ! ip multicast-routing ! ! interface Ethernet0/0  ip address 160.10.22.6 255.255.255.0   ip pim sparse-mode ! R6# ! ! ________________________________________________________________ R3#show ip pim rp Group: 224.0.1.40, RP: 160.10.22.6, uptime 1d01h, expires never R3# ! ! ________________________________________________________________ R5#show ip pim rp Group: 224.0.1.40, RP: 160.10.22.6, uptime 1d01h, expires never R5# 

• Configure R3, R5, and R6 to prune their groups in eight seconds.

The idea is to have the responder router to respond quickly to an IGMP query message before the router deletes the group. The default is 10 seconds, so you need to configure a value a little less than 10 seconds.

If you configured this correctly as shown in Example 6-51, you have scored 3 points.

Example 6-51. R3, R5, and R6 Maximum Query Response Time Change Configuration

 R3#sh run int fa0/0 Building configuration... Current configuration : 185 bytes ! interface FastEthernet0/0  ip address 160.10.22.3 255.255.255.0  ip igmp query-max-response-time 8 ! R3# ! ________________________________________________________________ R5#sh run int fa0/0 Building configuration... Current configuration : 187 bytes ! interface FastEthernet0/0  ip address 160.10.22.5 255.255.255.0 ip igmp query-max-response-time 8  end ! R5# ! ________________________________________________________________ R6#sh run int e0/0 Building configuration... Current configuration : 152 bytes ! interface Ethernet0/0  ip address 160.10.22.6 255.255.255.0  ip igmp query-max-response-time 8 end R6#