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Multicast Routing Commands
4-295
4
Multicast Routing Commands
This router uses IGMP snooping and query to determine the ports connected to
downstream multicast hosts, and to propagate this information back up through the
multicast tree to ensure that requested services are forwarded through each
intermediate node between the multicast server and its hosts, and also to filter traffic
from all of the other interfaces that do not require these services.
Multicast routers use snooping and query messages, along with a multicast routing
protocol to deliver IP multicast packets across different subnetworks. This router
supports both the Distance-Vector Multicast Routing Protocol (DVMRP) and
Protocol Independent Multicasting (PIM). (Note that you should enable IGMP for any
interface that is using multicast routing.)
Static Multicast Routing Commands
ip igmp snooping vlan mrouter
This command statically configures a multicast router port. Use the no form to
remove the configuration.
Syntax
[no] ip igmp snooping vlan vlan-id mrouter interface
• vlan-id - VLAN ID (Range: 1-4093)
• interface
• ethernet unit/port
- unit - Stack unit. (Range: 1-8)
- port - Port number. (Range: 1-25/49)
• port-channel channel-id (Range: 1-32)
Table 4-102 Multicast Routing Commands
Command Groups Function Page
Static Multicast Routing Configures static multicast router ports 4-295
General Multicast Routing Enables IP multicast routing globally; also displays the IP multicast
routing table created from static and dynamic routing information
4-297
DVMRP Multicast Routing Configures global and interface settings for DVMRP 4-299
PIM-DM Multicast Routing Configures global and interface settings for PIM-DM 4-308
Table 4-103 Static Multicast Routing Commands
Command Function Mode Page
ip igmp snooping vlan
mrouter
Adds a multicast router port GC 4-295
show ip igmp snooping
mrouter
Shows multicast router ports PE 4-296