Cisco Catalyst 3550 series Software Configuration Manual page 815

Chapter 34 Configuring IP Multicast Routing
Configuring Candidate BSRs
You can configure one or more candidate BSRs. The devices serving as candidate BSRs should have
good connectivity to other devices and be in the backbone portion of the network.
Beginning in privileged EXEC mode, follow these steps to configure your multilayer switch as a
candidate BSR:
Command
Step 1
configure terminal
Step 2 ip pim bsr-candidate interface-id
hash-mask-length [priority]
Step 3 end
Step 4
show running-config
Step 5
copy running-config startup-config
To remove this device as a candidate BSR, use the no ip pim bsr-candidate global configuration
command.
This example shows how to configure a candidate BSR, which uses the IP address 172.21.24.18 on
Gigabit Ethernet interface 0/2 as the advertised BSR address, uses 30 bits as the hash-mask-length, and
has a priority of 10.
Switch(config)# interface gigabitethernet0/2
Switch(config-if)# ip address 172.21.24.18 255.255.255.0
Switch(config-if)# ip pim sparse-dense-mode
Switch(config-if)# ip pim bsr-candidate gigabitethernet0/2 30 10
78-11194-09
Purpose
Enter global configuration mode.
Configure your multilayer switch to be a candidate BSR.
For interface-id, enter the interface type and number on this switch
•
from which the BSR address is derived to make it a candidate. This
interface must be enabled with PIM. Valid interfaces include
physical ports, port channels, and VLANs.
For hash-mask-length, specify the mask length (32 bits maximum)
•
that is to be ANDed with the group address before the hash function
is called. All groups with the same seed hash correspond to the same
RP. For example, if this value is 24, only the first 24 bits of the group
addresses matter.
(Optional) For priority, enter a number from 0 to 255. The BSR with
•
the larger priority is preferred. If the priority values are the same,
the device with the highest IP address is selected as the BSR. The
default is 0.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Catalyst 3550 Multilayer Switch Software Configuration Guide
Configuring IP Multicast Routing
34-25