Chapter 51
| Multicast Routing Commands
PIM Multicast Routing
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Command Usage
When the source address of a register message is filtered by intermediate network
devices, or is not a uniquely routed address to which the RP can send packets, the
replies sent from the RP to the source address will fail to reach the DR, resulting in
PIM-SM protocol failures. This command can be used to overcome this type of
problem by manually configuring the source address of register messages to an
interface that leads back to the RP.
Example
This example sets the register rate limit to 500 pps.
Console(config)#ip pim register-source interface vlan 1
Console(config)#
ip pim rp-address This command sets a static address for the Rendezvous Point (RP) for a particular
multicast group. Use the no form to remove an RP address or an RP address for a
specific group.
Syntax
[no] ip pim rp-address rp-address [group-prefix group-address mask]
rp-address - Static IP address of the router that will be an RP for the specified
multicast group(s).
group-address - An IP multicast group address. If a group address is not
specified, the RP is used for all multicast groups.
mask - Subnet mask that is used for the group address.
Default Setting
None
Command Mode
Global Configuration
Command Usage
â—† The router specified by this command will act as an RP for all multicast groups
in the local PIM-SM domain if no groups are specified. A static RP can either be
configured for the whole multicast group range 224.0.0.0/4, or for specific
group ranges.
â—† Using this command to configure multiple static RPs with the same RP address
is not allowed. If an IP address is specified that was previously used for an RP,
then the older entry is replaced.
â—† Multiple RPs can be defined for different groups or group ranges. If a group is
matched by more than one entry, the router will use the RP associated with the
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