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200 CHAPTER 6: MULTICAST PROTOCOL
Perform the following configuration in PIM view.
For detailed information of the bsr-policy command, see the Switch 8800
Command Reference Guide.
Limiting the Range of Legal C-RP
In the PIM SM network, using BSR mechanism, every router can set itself as the
C-RP (candidate rendezvous point) servicing particular groups. If elected, a C-RP
becomes the RP servicing the current group.
In the BSR mechanism, a C-RP router unicasts C-RP messages to the BSR, which
then propagates the C-RP messages among the network by BSR message. To
prevent C-RP spoofing, you need to configure crp-policy on the BSR to limit legal
C-RP range and their service group range. Since each C-BSR has the chance to
become BSR, you must configure the same filtering policy on each C-BSR router.
Perform the following configuration in PIM view.
For detailed information of the crp-policy command, see the Switch 8800
Command Reference Guide.
Clearing Multicast Route Entries from PIM Routing Table
Perform the following configuration in user view.
If in this command, the group-address is 224.0.0.0/24 and source-address is the
RP address (where group address can have a mask, but the resulting IP address
must be 224.0.0.0, and source address has no mask), then it means only the (*, *,
RP) item will be cleared.
If in this command, the group-address is any group address, and source-address is
0 (where group address can have a mask, and source address has no mask), then
only the (*, G) item will be cleared.
Table 41 Limiting the Range of Legal BSR
Operation Command
Limit the legal BSR range bsr-policy acl-number
Restore to the default setting undo bsr-policy
Table 42 Limiting the Range of Legal C-RP
Operation Command
Limit the legal C-RP range crp-policy acl-number
Restore to the default setting undo crp-policy
Table 43 Clearing Multicast Route Entries from PIM Routing Table
Operation Command
Clear multicast route entries from PIM routing
table
reset pim routing-table { all | {
group-address [ mask group-mask |
mask-length group-mask-length ] |
source-address [ mask source-mask |
mask-length source-mask-length ] | {
incoming-interface { interface-type
interface-number | null } } } * }