Di Posting Oleh : Simple Learning
Kategori : Multicast
Prerequisites: CCNP level skills.
Note!
All routers are running EIGRP protocol as well as multicast routing.
Topology
Pic. 1 - Topology Diagram.
Icons designed by: Andrzej Szoblik - http://www.newo.pl
Task 1
Configure PIM on all router's transit interfaces in the topology diagram (pic.1) allowing Cisco Auto-RP. R1's Loopback should be advertised as RP candidate for the groups 224.6.6.0 - 224.6.6.255. R5's Loopback should be advertised as the Mapping Agent. Auto-RP advertisements should be sent every 10 seconds. Ensure, that routers do not use PIM Dense-Mode for the unknown groups.
Solution
Task 1
Configure PIM on all router's transit interfaces in the topology diagram (pic.1) allowing Cisco Auto-RP. R1's Loopback should be advertised as RP candidate for the groups 224.6.6.0 - 224.6.6.255. R5's Loopback should be advertised as the Mapping Agent. Auto-RP advertisements should be sent every 10 seconds. Ensure, that the routers do not use PIM Dense-Mode for the unknown groups.
All Transit Interfaces:
!
ip pim sparse-dense-mode
!
All PIM-Sparse-Dense-Mode Routers
!
no ip pim dm-fallback
!
Note!
PIM Sparse-Dense-Mode is used to resolve the problem of advertising a router as the RP candidate. Auto-RP uses two multicast addresses:
- 224.0.1.39 - Cisco-RP-Announce
- 224.0.1.40 - Cisco-RP-Discover
R1 Configuration:
!
interface Loopback0
ip address 172.16.101.1 255.255.255.0
ip pim sparse-dense-mode
ip address 172.16.101.1 255.255.255.0
ip pim sparse-dense-mode
!
access-list 1 permit 224.6.6.0 0.0.0.255
!
ip pim send-rp-announce Loopback0 scope 16 group-list 1 interval 10
!
R5 Configuration:
!
interface Loopback0
ip address 172.16.105.5 255.255.255.0
ip pim sparse-dense-mode
!
ip address 172.16.105.5 255.255.255.0
ip pim sparse-dense-mode
!
!
ip pim send-rp-discovery loopback0 scope 16 interval 10
!
Note!
Both the candidate RP and Mapping Agent, must have their loopback enabled for any PIM mode.
Verification (on all routers: here R6 only):
Pic. 2 - R6's Auto-RP Info.
!
interface Ethernet0/0
ip address 10.1.56.6 255.255.255.0
ip pim sparse-dense-mode
ip igmp join-group 224.6.6.6
ip address 10.1.56.6 255.255.255.0
ip pim sparse-dense-mode
ip igmp join-group 224.6.6.6
!
Pic. 3 - Ping Test.
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