28-18
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 28 Configuring IPv4 Multicast Layer 3 Switching
Configuring IPv4 Multicast Layer 3 Switching
Configuring Multicast Boundary
To configure a multicast boundary, perform this task:
Note If you configure the filter-autorp keyword, the administrative boundary examines auto-RP discovery
and announcement messages and removes any auto-RP group range announcements from the auto-RP
packets that are denied by the boundary ACL. An auto-RP group range announcement is permitted and
passed by the boundary only if all addresses in the auto-RP group range are permitted by the boundary
ACL. If any address is not permitted, the entire group range is filtered and removed from the auto-RP
message before the auto-RP message is forwarded.
The following example sets up a multicast boundary for all administratively scoped addresses:
Router (config)# access-list 1 deny 239.0.0.0 0.255.255.255
Router (config)# access-list 1 permit 224.0.0.0 15.255.255.255
Router (config)# interface gigabitethernet 5/2
Router (config-if)# ip multicast boundary 1
Displaying IPv4 Multicast Layer 3 Hardware Switching Summary
Note The show interface statistics command does not display hardware-switched packets, only packets
switched by software.
The show ip pim interface count command displays the IP multicast Layer 3 switching enable state on
IP PIM interfaces and the number of packets received and sent on the interface.
Command Purpose
Step 1
Router(config)# interface {{vlan
vlan_ID
} |
{
type
1
slot/port
} | {port-channel
number
}}
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
Selects an interface to configure.
Step 2
Router(config-if)# ip multicast boundary
access_list
[filter-autorp]
Enables an administratively scoped boundary on an
interface.
• For access_list, specify the access list that you have
configured to filter the traffic at this boundary.
• (Optional) Specify filter-autorp to filter auto-RP
messages at this boundary.
Router(config-if)# no ip multicast boundary
Disables the multicast boundary for this interface.
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