36-12
Catalyst 3750 Switch Software Configuration Guide
78-16180-02
Chapter 36 Configuring IP Multicast Routing
Configuring IP Multicast Routing
To disable multicasting, use the no ip multicast-routing distributed global configuration command. To
return to the default PIM version, use the no ip pim version interface configuration command. To
disable PIM on an interface, use the no ip pim interface configuration command.
Configuring a Rendezvous Point
You must have an RP if the interface is in sparse-dense mode and if you want to treat the group as a sparse
group. You can use several methods, as described in these sections:
• Manually Assigning an RP to Multicast Groups, page 36-12
• Configuring Auto-RP, page 36-14 (a standalone, Cisco-proprietary protocol separate from PIMv1)
• Configuring PIMv2 BSR, page 36-18 (a standards track protocol in the Internet Engineering Task
Force (IETF)
You can use Auto-RP, BSR, or a combination of both, depending on the PIM version you are running
and the types of routers in your network. For more information, see the “PIMv1 and PIMv2
Interoperability” section on page 36-9 and the “Auto-RP and BSR Configuration Guidelines” section on
page 36-10.
Manually Assigning an RP to Multicast Groups
This section explains how to manually configure an RP. If the RP for a group is learned through a
dynamic mechanism (such as Auto-RP or BSR), you need not perform this task for that RP.
Senders of multicast traffic announce their existence through register messages received from the
source’s first-hop router (designated router) and forwarded to the RP. Receivers of multicast packets use
RPs to join a multicast group by using explicit join messages. RPs are not members of the multicast
group; rather, they serve as a meeting place for multicast sources and group members.
You can configure a single RP for multiple groups defined by an access list. If there is no RP configured
for a group, the multilayer switch treats the group as dense and uses the dense-mode PIM techniques.
To Next Page
Loading...
Need help?
General