Di Posting Oleh : Simple Learning
Kategori : Multicast
Prerequisites: CCNP level skills.
Note!
All routers are running EIGRP protocol as well as multicast routing. All transit interfaces have been configured as Sparse Mode.
Topology
Pic. 1 - Topology Diagram.
Icons designed by: Andrzej Szoblik - http://www.newo.pl
Task 1
All routers in the topology run PIM Sparse Mode. Configure R1 as both the RP and the Mapping Agent for all multicast groups. Use Auto-RP to disseminate this information. Do not change the PIM Mode (Sparse Mode). RP should advertise itself as RP every 10 seconds.
Task 2
Configure R4's Et0/0 interface to join the group 224.40.40.40. Ensure that R2 registers the group with the RP.
Solution
Task 1
All routers in the topology run PIM Sparse Mode. Configure R1 as both the RP and the Mapping Agent for all multicast groups. Use Auto-RP to disseminate this information. Do not change the PIM Mode (Sparse Mode). RP should advertise itself as RP every 10 seconds.
All Routers Configuration:
!
ip pim autorp listener
!
R1 Configuration:
!
interface Loopback0
ip address 172.16.101.1 255.255.255.0
ip pim sparse-mode
!
ip address 172.16.101.1 255.255.255.0
ip pim sparse-mode
!
ip pim send-rp-announce Loopback0 scope 16 interval 10
ip pim send-rp-discovery Loopback0 scope 16 interval 10
ip pim send-rp-discovery Loopback0 scope 16 interval 10
!
Task 2
Configure R4's Et0/0 interface to join the group 224.40.40.40. Ensure that R2 registers the group with RP.
Before configuring the 'igmp join-group' let's see which router is the DR on the subnet.
Pic. 1 - DR on 10.1.234.0/24
Since all routers have the same priority (p=1), the highest IP address (here: R4) has been elected to be PIM DR on this segment. DR is responsible for registering multicast clients/multicast feed with RP (group/multicast traffic registration). Unlike OSPF's DR, the PIM DR role is preemptive.
R2 Configuration:
!
interface Ethernet0/0
ip address 10.1.234.2 255.255.255.0
ip pim dr-priority 50
ip pim sparse-mode
ip address 10.1.234.2 255.255.255.0
ip pim dr-priority 50
ip pim sparse-mode
!
Pic. 3 - R2 Becomes PIM DR.
Pic 4 - R2's Group Registration.
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