3Com 7757 Configuration Manual page 474

474 C 47: PIM C
HAPTER ONFIGURATION
Configuring PIM-SM
Domain Boundary
c
Filtering the
Registration Packets
from RP to DR
If both a dynamic RP and a static RP exist simultaneously, and if you have
■
configured the keyword preferred, the static RP has the priority over the
dynamic RP.
The PIM protocol need not be enabled on the interface of static RPs.
■
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.
Table 380 Configure PIM-SM domain boundary
Operation
Enter system view
Enable the multicast routing
protocol
Enter VLAN interface view
Enable PIM-SM on the current
interface
Configure PIM-SM domain
boundary
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.
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.
Table 381 Filter the registration packets from RP to DR
Operation
Enter system view
Enable the multicast routing
protocol
Enter VLAN interface view
Enable IGMP on the current
interface
Command
system-view
multicast routing-enable
interface Vlan-interface
interface-number
pim sm
pim bsr-boundary
Command
system-view
multicast routing-enable
interface Vlan-interface
interface-number
pim sm
Description
-
Required
-
Required
Configure the PIM protocol
type on the interface.
Required
By default, domain boundary
is not set for the switch.
Description
-
Enable the multicast routing
protocol
-
Required
Configure the PIM protocol
type on the interface