3Com SuperStack 4 Configuration Manual page 186

198 C 7: M
HAPTER ULTICAST
P
ROTOCOL
address is considered better when the priority is the same. If the new BSR
address is better, the candidate BSR will replace its BSR address and stop
regarding itself as the BSR. Otherwise, the candidate BSR will keep its BSR
address and continue to regard itself as the BSR.
Perform the following configuration in PIM view.
Table 214 Configuring candidate-BSRs
Operation
Configure a candidate-BSR
Remove the candidate-BSR
configured
Candidate-BSRs should be configured on the routers in the network backbone. By
default, no BSR is set. The default priority is 0.
One Switch can only be configured with one candidate-BSR. When a
candidate-BSR is configured on another interface, it will replace the previous
configuration.
Configuring Candidate-RPs
In PIM-SM, the shared tree built by the multicast routing data is rooted at the RP.
There is a mapping from a multicast group to an RP. A multicast group can be
mapped to an RP. Different groups can be mapped to one RP.
Perform the following configuration in PIM view.
Table 215 Configuring candidate-RPs
Operation
Configure a candidate-RP
Remove the candidate-RP
configured
When configuring RP, if the range of the served multicast group is not specified,
the RP will serve all multicast groups. Otherwise, the range of the served multicast
group is the multicast group in the specified range. 3Com recommends that you
configure Candidate RP on the backbone router.
Configuring Static RP
Static RP serves as the backup of dynamic RP, so as to improve network robusticity.
Perform the following configuration in PIM view.
Table 216 Configuring Static RP
Operation
Configure static RP
Remove the configured static RP
Command
c-bsr interface-type interface_number
hash_mask_len
[
undo c-bsr
Command
c-rp interface_type interface_number
group-policy acl_number
priority_value
]*
undo c-rp { interface_type interface_number
all }
Command
static-rp rp_address
undo static-rp
priority
]
[
| priority
[ acl_number
rp_address
|
]