PIM-SM (Sparse Mode)
Configuring PIM-SM on the Router
Figure 4-7 illustrates the following configuration steps for the Router PIM
context:
■ Enabling BSR operation on the router, including specifying a source IP
address.
■ Enabling C-RP operation on the router.
■ Replacing the default multicast group range (all) with a smaller range
(231.128.24.0/18) and a single group address (230.255.1.1/32).
■ Enabling static-RP with an override on this router for a single group
address (231.128.64.255/32) within the range of the C-RP support for the
231.128.24.0 group.
■ Leaving the other Router PIM fields in their default settings.
ProCurve(config)# router pim
ProCurve(pim)# bsr-candidate source-ip-vlan 120
ProCurve(pim)# rp-candidate source-ip-vlan 120
ProCurve(pim)# rp-candidate group-prefix 231.128.64.0/18
ProCurve(pim)# rp-candidate group-prefix 230.255.1.1/32
ProCurve(pim)# no rp-candidate group-prefix 224.0.0.0/4
ProCurve(pim)# rp-address 120.11.10.1 231.128.64.0/18
override
ProCurve(pim)#
Enters Router PIM
context.
Configures and
automatically
enables C-BSR
operation for all
possible groups
(224.0.0.0/4).
Removes support
for the default
group entry for all
possible groups
(224.0.0.0/4).
Configures static-
RP support with
override.
Note: The static RP takes precedence over the C-RP for multicast groups in the range of 231.128.64.0/
18 because the mask configured for the static RP meets the criteria of being either equal to or greater
than the mask configured for the same group in the C-RP. For example, if the mask for the static-RP
was 17 or less, the override would not take effect (even though configured), and the C-RP configuration
would take precedence.
Figure 4-7. Example of Enabling PIM-SM in the Router PIM Context
The next figure illustrates the results of the above commands in the router’s
running configuration.
4-44
