3Com Switch 7750 Configuration Guide Guide

432 CHAPTER 44: PIM CONFIGURATION
■ The limit on the range of valid BSRs is to prevent the valid BSRs in the network
being replaced maliciously. The other BSR information except the range will not
be received by the Layer 3 switch, and thus the security of BSRs in the network
is protected.
■ The limit on the range of C-RPs is to avoid C-RP cheating. You can limit the
range of valid C-RPs and limit the range of multicast groups that each C-RP
serves.
Configuring PIM-SM
Domain Boundary
c
CAUTION:
■ When the PIM-SM domain boundary is set, Bootstrap messages cannot pass
the boundary in any direction. In this way, PIM-SM domains are divided.
■ When this feature is configured, Bootstrap messages cannot pass the
boundary. However, the other PIM messages can pass the domain boundary.
The network can be effectively divided into domains using different BSRs.
Filtering the
Registration Packets
from RP to DR
Through the registration packet filtering mechanism in PIM-SM network, you can
determine which sources send packets to which groups on RP, that is, RP can filter
the registration packets from DR and receive the specified packets only.
Tabl e 345 Configure PIM-SM domain boundary
Operation Command Description
Enter system view system-view -
Enable the multicast routing
protocol
multicast routing-enable Required
Enter VLAN interface view
interface Vlan-interface
interface-number
-
Enable PIM-SM on the current
interface
pim sm
Required
Configure the PIM protocol
type on the interface.
Configure PIM-SM domain
boundary
pim bsr-boundary
Required
By default, domain boundary
is not set for the switch.
Tabl e 346 Filter the registration packets from RP to DR
Operation Command Description
Enter system view system-view -
Enable the multicast routing
protocol
multicast routing-enable
Enable the multicast routing
protocol
Enter VLAN interface view
interface Vlan-interface
interface-number
-
Enable IGMP on the current
interface
pim sm
Required
Configure the PIM protocol
type on the interface
Quit VLAN view quit -
Enter PIM view pim -