3com MSR 20-20 참조 매뉴얼

bsr-policy acl6-number

IPv6 PIM view

acl6-number: Basic IPv6 ACL number, in the range of 2000 to 2999. When an IPv6 
ACL is defined, the source keyword in the rule command specifies a legal BSR 
source IPv6 address range.

Use the bsr-policy command to configure a legal BSR address range to guard 
against BSR spoofing.

Use the undo bsr-policy command to remove the restriction of the BSR address 
range.

By default, there are no restrictions on the BSR address range, namely all the 
received BSR messages are regarded to be valid.

# Configure a legal BSR address range so that only routers on the segment 
2001::2/64 can become the BSR.

<Sysname> system-view

[Sysname] acl ipv6 number 2000

[Sysname-acl6-basic-2000] rule permit source 2001::2 64

[Sysname-acl6-basic-2000] quit

[Sysname] pim ipv6

[Sysname-pim6] bsr-policy 2000 

c-bsr ipv6-address [ hash-length [ priority ] ]

IPv6 PIM view

ipv6-address: IPv6 address of the interface that is to act as a C-BSR.