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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
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Chapter 51 Configuring Multicast Services
Configuring RGMP on the Switch
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The following properties of RGMP are the same as for IGMP snooping:
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RGMP constrains the traffic that is based on the multicast group, not on the sender’s IP address.
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If spanning-tree topology changes occur in the network, the state is not flushed as it is with
CGMP.
–
RGMP does not constrain the traffic for multicast groups 224.0.0.x (x = 0...255), which allow
use of the PIMv2 bootstrap router (BSR) in an RGMP-controlled network.
–
RGMP in the Cisco switches operates on the MAC addresses, not on the IP multicast addresses.
Because multiple IP multicast addresses can map to one MAC address (see RFC 1112), RGMP
cannot differentiate between the IP multicast groups that might map to a MAC address.
–
The capability of the switch to constrain the traffic is limited by its content addressable memory
(CAM) table capacity.
Configuring RGMP on the Switch
These sections describe the commands for configuring RGMP:
•
Configuring RGMP on the Supervisor Engine, page 51-31
•
Configuring RGMP on the MSFC, page 51-35
Configuring RGMP on the Supervisor Engine
These sections describe the commands for configuring RGMP:
•
Default RGMP Configuration, page 51-31
•
Enabling and Disabling RGMP, page 51-32
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Displaying RGMP Group Information, page 51-32
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Displaying RGMP VLAN Statistics, page 51-33
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Displaying RGMP-Capable Router Ports, page 51-33
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Clearing RGMP Statistics, page 51-34
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RGMP-Related CLI Commands, page 51-34
Default RGMP Configuration
RGMP is disabled by default.
