3com 8807 Reference Guide

C

HAPTER

 36: PIM C

ONFIGURATION

 C

OMMANDS

be BSR, thus the routers cannot receive or forward BSR messages other than 
these two. Even legal BSRs cannot contest with them.

Problems may still exist if a legal BSR is attacked, though these two measures can 
effectively guarantee high BSR security.

The source parameter in the rule command is translated as BSR address in the 
bsr-policy command.

Related command: acl and rule.

# Configure BSR filtering policy on routers, only 101.1.1.1/32 can be BSR and all 
others are illegal.

<SW8800> system-view

 

System View: return to User View with Ctrl+Z.

 

[SW8800] multicast routing-enable

 

[SW8800]pim

 

[3Com-pim] bsr-policy 2000

 

[3Com-pim] quit

 

[SW8800] acl number 2000

 

[3Com-acl-basic-2000] rule 0 permit source 101.1.1.1 0 

c-bsr interface-type interface-number hash-mask-len [ priority ]

PIM view

interface-type interface-number:. Interface type and interface number, used to 
specify the interface. The candidate BSR is configured on the interface. PIM-SM 
must be enabled on the interface first.

hash-mask-len: Length of the mask. The value ranges from 0 to 32.

priority: Priority of the candidate BSR. The larger the value of the priority, the 
higher the priority of the BSR. The value ranges from 0 to 255. By default, the 
priority is 0.

Use the c-bsr command to configure a candidate BSR.

Use the undo c-bsr command to remove the candidate BSR configured.

By default, no candidate BSR is set.

When configure the candidate BSR, the larger bandwidth should be guaranteed 
since a great amount of information will be exchanged between BSR and other 
devices in the PIM domain.