Installation guide

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards
How to Configure EtherSwitch HWICs
39
Cisco IOS Release 12.3(8)T4
OL-6454-01
Configuring IP Multicast Layer 3 Switching
These sections describe how to configure IP multicast Layer 3 switching:
• Enabling IP Multicast Routing Globally, page 39
• Enabling IP Protocol-Independent Multicast (PIM) on Layer 3 Interfaces, page 39
• Verifying IP Multicast Layer 3 Hardware Switching Summary, page 40
• Verifying the IP Multicast Routing Table, page 41
Enabling IP Multicast Routing Globally
You must enable IP multicast routing globally before you can enable IP multicast Layer 3 switching on
Layer 3 interfaces.
For complete information and procedures, refer to these publications:
• Cisco IOS IP Configuration Guide, Release 12.2, at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/
• Cisco IOS IP Command Reference, Volume 1 of 3: Addressing and Services, Release 12.2 at this
URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipras_r/index.htm
• Cisco IOS IP Command Reference, Volume 2 of 3: Routing Protocols, Release 12.2 at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fiprrp_r/index.htm
• Cisco IOS IP Command Reference, Volume 3 of 3: Multicast, Release 12.2 at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fiprmc_r/index.htm
To enable IP multicast routing globally, use the following command in global configuration mode:
Enabling IP Protocol-Independent Multicast (PIM) on Layer 3 Interfaces
You must enable PIM on the Layer 3 interfaces before enabling IP multicast Layer 3 switching functions
on those interfaces.
Beginning in global configuration mode, follow these steps to enable IP PIM on a Layer 3 interface.
SUMMARY STEPS
1. interface vlan vlan-id
2. ip pim {dense-mode | sparse-mode | sparse-dense-mode}
Command Purpose
Router(config)# ip multicast-routing
Enables IP multicast routing globally.