44-10
Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide
OL-13270-01
Chapter44 Configuring IP Multicast Routing
Configuring IP Multicast Routing
In a switch stack, the routing master (stack master) performs these functions:
It is responsible for completing the IP multicast routing functions of the stack. It fu lly initializ es and
runs the IP multicast routing protocols.
It builds and maintains the multicast routing table for the entire stack.
It is responsible for distributing the multicast routing table to all stack members.
The stack members perform these functions:
They act as multicast routing standby devices and are ready to take over if there is a stack master
failure.
If the stack master fails, all stack members delete their multicast routing tables. The newly elected
stack master starts building the routing tables and distributes them to the stack members.
Note If a stack master running the IP services feature set fails and if th e newly elect ed stack master
is running the IP base feature set, the switch stack loses its multicast routing capability.
For information about the stack master election process, see Chapter5, “Managing Switch Stacks.”
They do not build multicast routing tables. Instead, they use the multicast routing table that is
distributed by the stack master.
Configuring IP Multicast Routing
These sections contain this configuration information:
Default Multicast Routing Configuration, page 44-10
Multicast Routing Configuration Guidelines, page44-11
Configuring Basic Multicast Routing, page44-12 (require d)
Configuring PIM Stub Routing, page 44-14
Configuring PIM Stub Routing, page 44-14 (optional)
Configuring a Rendezvous Point, page 44-16 (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 44-26 (required for non-Cisco PIMv2 devices to interoperate with
Cisco PIM v1 devices))
Monitoring the RP Mapping Information, page 44-27 (optional)
Troubleshooting PIMv1 and PIMv2 Interoperability Problems, page44-27 (optional)

Default Multicast Routing Configuration

Table44-2 shows the default multicast routing configuration.