Alcatel Carrier Internetworking Solutions 6648 User Manual
BSR Election
Troubleshooting PIM-SM
page 16-6
OmniSwitch Troubleshooting Guide
September 2005
BSR Election
Candidates-BSR sends Bootstrap messages within its PIM-SM domain. Bootstrap messages are multicast
to the ALL-PIM-ROUTERS group. Bootstrap message parameters C-BSR ID, which are equal to the BSR
IP address, and the C-BSR priority, are used for the BSR election. The BSR will be the router with the
highest priority; in case the routers have the same priority, the highest IP address will become the BSR.
After BSR has been elected, intermediate routers forward Bootstrap messages originated at the BSR.
to the ALL-PIM-ROUTERS group. Bootstrap message parameters C-BSR ID, which are equal to the BSR
IP address, and the C-BSR priority, are used for the BSR election. The BSR will be the router with the
highest priority; in case the routers have the same priority, the highest IP address will become the BSR.
After BSR has been elected, intermediate routers forward Bootstrap messages originated at the BSR.
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3
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3
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192.168.11.2
192.168.10.2
192.168.10.3
192.168.9.4
192.168.9.2
bootstrap message
BSR ID 192.168.11.1
BSR priority 0
bootstrap message
BSR ID 192.168.11.2
BSR priority 0
bootstrap message
source ip 192.168.10.2
BSR ID 192.168.11.1
BSR priority 0
bootstrap message
source ip 192.168.9.2
BSR ID 192.168.11.1
BSR priority 0