652 CHAPTER 47: PIM CONFIGURATION
Configuring PIM-SSM
n
The PIM-SSM model needs the support of IGMPv3. Therefore, be sure to enable
IGMPv3 on PIM routers with multicast receivers.
PIM-SSM Configuration
Task Li st
Complete these tasks to configure PIM-SSM:
Configuration
Prerequisites
Before configuring PIM-SSM, complete the following task:
■ Configure any unicast routing protocol so that all devices in the domain are
interoperable at the network layer.
Before configuring PIM-SSM, prepare the following data:
■ The SSM group range
Enabling PIM-SM The SSM model is implemented based on some subsets of PIM-SM. Therefore, a
router is PIM-SSM capable after you enable PIM-SM on it.
When deploying a PIM-SM domain, you are recommended to enable PIM-SM on
all interfaces of non-border routers (border routers are PIM-enabled routers
located on the boundary of BSR admin-scope regions).
Follow these steps to enable PIM-SM:
c
CAUTION: All the interfaces of the same router must work in the same PIM mode.
Configuring the SSM
Group Range
As for whether the information from a multicast source is delivered to the
receivers based on the PIM-SSM model or the PIM-SM model, this depends on
whether the group address in the (S, G) channel subscribed by the receivers falls in
the SSM group range. All PIM-SM-enabled interfaces assume that multicast
groups within this address range are using the PIM-SSM model.
Follow these steps to configure an SSM multicast group range:
Task Remarks
“Enabling PIM-SM” on page 652 Required
“Configuring the SSM Group Range” on page 652 Optional
“Configuring PIM Common Information” on page 653 Optional
To do… Use the command… Remarks
Enter system view system-view -
Enable IP multicast routing multicast routing-enable Required
Disable by default
Enter interface view interface interface-type
interface-number
-
Enable PIM-SM pim sm Required
Disabled by default
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