Configuring C-BSRs
About C-BSRs
You must configure C-BSRs when you configure dynamic RP election.
To prevent a legal BSR from being replaced by a malicious host, configure a BSR policy to filter BSR messages by using an ACL that specifies the legal BSR addresses.
Restrictions and guidelines
Configure C-BSRs on devices that reside in the backbone device.
Because the BSR and other devices exchange a large amount of information in the BIDIR-PIM domain, reserve a large bandwidth between the C-BSRs and other devices.
The C-BSR configuration on the devices in the BIDIR-PIM domain must be the same.
For C-BSRs interconnected through a GRE tunnel, configure static multicast routes to make sure the next hop to a C-BSR is a tunnel interface. For more information about static multicast routes, see "Configuring multicast routing and forwarding."
Procedure
Enter system view.
system-view
Enter PIM view.
pim [ vpn-instance vpn-instance-name ]
Configure a C-BSR.
c-bsr ip-address [ scope group-address { mask-length | mask } ] [ hash-length hash-length | priority priority ] *
(Optional.) Configure a BSR policy.
bsr-policy ipv4-acl-number
By default, no BSR policy is configured. All bootstrap messages are regarded as legal.