Cisco Catalyst 3750 - Configuring IP Multicast Routing; Default Multicast Routing Configuration; Multicast Routing Configuration Guidelines

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Catalyst 3750 Metro Switch Software Configuration Guide
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Chapter 31 Configuring IP Multicast Routing
Configuring IP Multicast Routing
CGMP is necessary because the Layer 2 switch cannot distinguish between IP multicast data packets and
IGMP report messages, which are both at the MAC-level and are addressed to the same group address.
Configuring IP Multicast Routing
These sections describe how to configure IP multicast routing:
• Default Multicast Routing Configuration, page 31-8
• Multicast Routing Configuration Guidelines, page 31-8
• Configuring Basic Multicast Routing, page 31-10 (required)
• Configuring a Rendezvous Point, page 31-11 (required if the interface is in sparse-dense mode, and
you want to treat the group as a sparse group)
• Using Auto-RP and a BSR, page 31-21 (required for non-Cisco PIMv2 devices to interoperate with
Cisco PIM v1 devices))
• Monitoring the RP Mapping Information, page 31-22 (optional)
• Troubleshooting PIMv1 and PIMv2 Interoperability Problems, page 31-22 (optional)
Default Multicast Routing Configuration
Table 31-2 shows the default multicast routing configuration.
Multicast Routing Configuration Guidelines
To avoid misconfiguring multicast routing on your switch, review the information in these sections:
• PIMv1 and PIMv2 Interoperability, page 31-9
• Auto-RP and BSR Configuration Guidelines, page 31-9
Table 31-2 Default Multicast Routing Configuration
Feature Default Setting
Multicast routing Disabled on all interfaces.
PIM version Version 2.
PIM mode No mode is defined.
PIM RP address None configured.
PIM domain border Disabled.
PIM multicast boundary None.
Candidate BSRs Disabled.
Candidate RPs Disabled.
Shortest-path tree threshold rate 0 kbps.
PIM router query message interval 30 seconds.