As we discussed many things about Multicast in previous posts, it will be better to see some real time solution which will help us for better understanding. How multicast is deployed in large enterprises.
Test Requirements – Large Enterprise is having 2 redundant multicast servers with same multicast group 239.1.1.1. As any of multicast servers went faulty due to any reason, other multicast server will work as backup to serve network and avoid downtime. Same time they want redundant BSR and RP for network. In any case Primary is not available, that time backup should take care.
Test Topology
Testing description:
Customer requires redundancy for Multicast servers and RP. Master multicast server goes down due to any reason, and then backup server sends the same multicast traffic 239.1.1.1. We need to check the convergence time how long time the client side can receive the 239.1.1.1 and same time If Primary RP goes down, Backup RP should work as primary and spoke location can access backup multicast server.
Test Process:
Multicast host 6.1.1.2 wants to join multicast group 239.1.1.1. MP 2816 router check the RP mapping and send the request to Primary RP. As source receive Join request from host, Now 4.1.1.2 (Multicast source) sends the multicast traffic 239.1.1.1 to Multicast host 6.1.1.2, It can receive the multicast stream properly.
Now 4.1.1.2 (Multicast source) is down due to some issue.
OR
Primary RP is down due to any reason. That time
Backup RP will work as Master and backup multicast server 5.1.1.2 send the same 239.1.1.1 multicast stream manually.
And finally the convergence time less than 5 second, Now Multicast host can receive same multicast stream 239.1.1.1.This solution is majorly deployed to achieve redundancy in multicast network.
Test Configurations:
MP1800-36:
ip mef
ip load-sharing per-destination
ip multicast-routing
controller e1 1/0
channel-group 0 timeslots 1-31
framing crc4
exit
!end
vlan 1
exit
interface fastethernet0
ip address 2.1.1.1 255.255.255.0
ip pim sparse-mode
exit
interface fastethernet1
ip address 4.1.1.1 255.255.255.0
ip pim sparse-mode
exit
interface serial1/0:0
encapsulation hdlc
ip address 1.1.1.2 255.255.255.0
bandwidth 1984
ip pim sparse-mode
exit
router ospf 1
network 0.0.0.0 255.255.255.255 area 0
exit
ip pim bsr-candidate fastethernet0 10 ### Primary BSR ###
ip pim rp-candidate fastethernet0 190 ### Primary RP ###
MP801E:
ip multicast-routing
controller e1 0/0
channel-group 0 timeslots 1-31
framing crc4
exit
interface fastethernet0
ip address 3.1.1.1 255.255.255.0
ip pim sparse-mode
exit
interface fastethernet1
ip address 5.1.1.1 255.255.255.0
ip pim sparse-mode
exit
interface serial0/0:0
encapsulation hdlc
ip address 1.1.1.1 255.255.255.0
bandwidth 1984
ip pim sparse-mode
exit
router ospf 1
network 0.0.0.0 255.255.255.255 area 0
exit
ip pim bsr-candidate fastethernet0
ip pim rp-candidate fastethernet0
MP2816:
ip mef
ip load-sharing per-destination
ip multicast-routing
vlan 1
description default
port 0-23 untagged
exit
interface fastethernet0
ip address 3.1.1.2 255.255.255.0
ip pim sparse-mode
exit
interface fastethernet1
ip address 2.1.1.2 255.255.255.0
ip pim sparse-mode
exit
interface switchethernet1
ip address 6.1.1.1 255.255.255.0
vlan 1
ip pim sparse-mode
exit
router ospf 1
network 0.0.0.0 255.255.255.255 area 0
exit
### MP2816 router is spoke router it will learn BSR information with PIM messages and RP information from BSR. ###
Test Results:
- As Primary Multicast server goes down and Primary Master RP is still live, That time backup multicast server will register with Primary RP. It will send same multicast traffic 239.1.1.1 in network.
- As Primary multicast server 239.1.1.1 and Primary RP (MP1800) goes down. That time Backup RP (MP 801E) will work as Primary RP and backup Multicast server will register to available RP and it will send same multicast stream(239.1.1.1) in network.
That means this multicast solution will overcome both challenges, which normally enterprises has to deal.
Hope you like this solution. This above configuration is tested on Maipu Routers, Cisco routers will have same configurations.
Your comments will help me to improve my posts. For any queries put comments with your mail id…
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