2. DECENTRALISING UNDER PRESSURE: THE SPANISH
3.2 Research design
Protocol Independent Multicast Operations (Part 4)
Technologies Covered
RPF failure
Multicast BGP extension
BSR propagation filtering
MSDP
Overview
Multicast troubleshooting is included in this scenario. The ability of finding and fixing RPF failures is essential for this lab. In addition, you also have to know how to deploy MSDP and be familiar with L2 multicast related topics.
Estimated Time to Complete: 3 hours
iPexpert’s Recommended Reading Material
Configuring Multiprotocol BGP Extensions for IP Multicast:
http://www.cisco.com/c/en/us/td/docs/ios/12_2/ip/configuration/guide/fipr_c/1cfmbgp.html
Using MSDP to Interconnect Multiple PIM-SM Domains:
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/imc-pim-15-mt-book/imc_msdp_im_pim_sm.html
iPexpert’s Recommended Video Training
iPexpert’s Video on Demand training library contains a wealth of videos pertaining to the CCIE Routing & Switching lab exam. We recommend watching the following learning videos that cover the topics seen in this lab scenario.
Video Title: IP Multicast
Video Title: IP Multicast Configuration and Troubleshooting
Video Title: MSDP Multicast Part 1
Video Title: MSDP Multicast Part 2
Topology Details
Logically connect and configure your network as displayed in the drawing below. You may also refer to the diagram located within your configuration files for topology information.
The topology used in the lab will be the following:
154 | P a g e Version 5.2F
Diagram 26.1: Multicast Operations Topology
Lab 26 Setup
This lab is intended to be used with online rack access. Connect to the terminal server for the online rack, and complete the configuration tasks as detailed below.
Configuration Tasks
1. Configure OSPF area 0 routing on the ethernet connections between R5 and R4, R4 and R3, and on the serial connection between R3 and R6. Advertise the loopbacks of R5, R4, R3, and R6 in the OSPF process. Use network statements.
2. Configure PIM sparse-mode on the ethernet connections between R5 and R4, R4 and R3, and R3 and R6.
NOTE
Load the initial configuration files before starting to work on the tasks.
router solution to advertise the RP. Use the loopback 0 of R3 as the RP IP address.
4. On R5, configure on the interface E0/0 an IGMP join for the group 225.7.7.7. Verify that you can ping from R6 to the multicast group 225.7.7.7.
5. Configure OSPF area 0 routing on the serial connection between R5 and R3. Do not enable PIM on this link.
6. Manipulate this OSPF cost to ensure that the direct link between R5 and R3 is the preferred path for OSPF.
7. Verify that you cannot ping from R6 to the multicast group 225.7.7.7 because of a RPF failure. To solve the RPF failure, you are not allowed to configure ip mroutes.
8. We are going to use multicast BGP. Remove OSPF from all the routers where it is running and shut down the direct connection between R5 and R3.
9. Configure an iBGP peering between R5 and R4 in AS20. Use the Physical IP addresses for the peering’s.
10. Configure an iBGP peering between R3 and R6 in AS10. Use the Physical IP addresses for the peering’s.
11. Configure an eBGP peering between R4 and R3. Use the Physical IP addresses for the peering’s.
12. Configure on each BGP router an “address-family ipv4 multicast”. Advertise all the circuits where there is a PIM neighborship into BGP with network statements.
13. Advertise The RP IP address into the address-family used for multicast.
14. Verify that the feed from R6 to the multicast group 225.7.7.7 is again reaching R5 after the migration from OSPF to BGP.
15. Configure OSPF area 0 routing on the connection between R5 and R8, on the connection between R8 and R2, and on the connection between R1 and R2. Advertise loopback0 networks.
16. Configure PIM in sparse mode on the connection between R5 and R8, on the connection between R8 and R2, and on the connection between R1 and R2.
17. R2 should be configured as the BSR and the RP for the all multicast groups. Use the PIM bootstrap router solution to advertise the RP. Use the loopback 0 of R2 as the RP IP address.
18. Separate the two BSR domains and make sure that the propagation of the BSR packets is filtered on the connection between R5 and R8.
19. On R6, configure on the interface E0/0 an IGMP join for the group 228.7.7.7.
156 | P a g e Version 5.2F 20. On R1, configure on the interface E0/0 an IGMP join for the group 228.7.7.7. Make sure that
when you ping from R4 to the group 228.7.7.7, the router R6 and R1 are replying. Use MSDP.
Enable OSPF process 2 on the R3, R4, and R5 path. You can add 1 static route.
21. Configure R3 as the PIM DR for the network 10.1.179.0/24.
22. On R7, configure on the interface E0/0 an IGMP join for the group 229.7.7.7. On R9, configure on the interface E0/0 an IGMP join for the group 229.7.7.7. On Cat2, verify that the IGMP filtering configured in the previous question is working.
Helpful Verification Commands
Show ip msdp
Technical Verification and Support
To verify your configurations please ensure that you have downloaded the latest “final configurations” from within the iPexpert Member’s Area.
You may also verify your configurations and obtain a detailed overview of why specific commands were used within the accompanying Detailed Solution Guide.
For instructor and developer support, please be sure to submit questions through our interactive support community that’s accessible from the Member’s Area.
This concludes Lab 26 of iPexpert's CCIE Routing & Switching Workbook, Volume 1, Section 2 Copyright© iPexpert. All Rights Reserved.