Configuring A Static Rendezvous Point Address; Configuring The Designated Router Priority; Filtering Pim Register Messages - Cisco 7604 Configuration Manual

Chapter 9 Configuring Multicast Routing
hostname(config-if)# no pim
To reenable PIM on an interface, enter the following command:
hostname(config-if)# pim
Only the no pim command appears in the interface configuration.
Note

Configuring a Static Rendezvous Point Address

All routers within a common PIM sparse mode or bidir domain require knowledge of the PIM RP
address. The address is statically configured using the pim rp-address command.
Note The FWSM does not support Auto-RP or PIM BSR; you must use the pim rp-address command to
specify the RP address.
You can configure the FWSM to serve as RP to more than one group. The group range specified in the
access list determines the PIM RP group mapping. If an access list is not specified, then the RP for the
group is applied to the entire multicast group range (224.0.0.0/4).
To configure the address of the PIM PR, enter the following command:
hostname(config)# pim rp-address ip_address [acl] [bidir]
The ip_address argument is the unicast IP address of the router to be a PIM RP. The acl argument is the
name or number of an access list that defines which multicast groups the RP should be used with.
Excluding the bidir keyword causes the groups to operate in PIM sparse mode.
Note The FWSM always advertises the bidir capability in the PIM hello messages regardless of the actual bidir
configuration.

Configuring the Designated Router Priority

The DR is responsible for sending PIM register, join, and prune messaged to the RP. When there is more
than one multicast router on a network segment, there is an election process to select the DR based on
DR priority. If multiple devices have the same DR priority, then the device with the highest IP address
becomes the DR.
By default, the FWSM has a DR priority of 1. You can change this value by entering the following
command:
hostname(config-if)# pim dr-priority num
The num argument can be any number from 1 to 4294967294.

Filtering PIM Register Messages

You can configure the FWSM to filter PIM register messages. To filter PIM register messages, enter the
following command:
Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM
OL-20748-01
Configuring PIM Features
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