Cisco Systems 78-11741-02 Wireless Office Headset User Manual


 
Configuring IP Multicast Routing
Configuring PIM Version 2
IPC-419
Cisco IOS IP Configuration Guide
Specifying the PIM Version
All systems using Cisco IOS Release 11.3(2)T or later start in PIM Version 2 mode by default. To
reenable PIM Version 2 or specify PIM Version 1 for some reason, control the PIM version by using the
following command in interface configuration mode:
Configuring PIM Version 2 Only
To configure PIM Version 2 exclusively, perform the tasks described in this section. It is assumed that
no PIM Version 1 system exists in the PIM domain.
The first task is recommended. If you configure Auto-RP, none of the other tasks is required to run PIM
Version 2. To configure Auto-RP, see the section “Configuring Auto-RP” earlier in this chapter.
If you want to configure a BSR, perform the tasks in the following sections. The tasks is the first section
are required; the tasks in the remaining sections are optional.
Configuring PIM Sparse-Dense Mode (Required)
Defining a PIM Sparse Mode Domain Border Interface (Optional)
Configuring Candidate BSRs (Optional)
Configuring Candidate RPs (Optional)
Configuring PIM Sparse-Dense Mode
To configure PIM sparse-dense mode, use the following commands on all PIM routers inside the PIM
domain beginning in global configuration mode:
Repeat Steps 2 and 3 for each interface on which you want to run PIM.
Defining a PIM Sparse Mode Domain Border Interface
A border interface in a PIM sparse mode (PIM-SM) domain requires special precautions to avoid
exchange of certain traffic with a neighboring domain reachable through that interface, especially if that
domain is also running PIM-SM. BSR and Auto-RP messages should not be exchanged between
different domains, because routers in one domain may elect RPs in the other domain, resulting in
protocol malfunction or loss of isolation between the domains.
Command Purpose
Router(config-if)# ip pim version [1 | 2]
Configures the PIM version used.
Command Purpose
Step 1
Router(config)# ip multicast-routing
Enables IP multicast routing.
Step 2
Router(config)# interface type number
Configures an interface.
Step 3
Router(config-if)# ip pim sparse-dense-mode
Enables PIM on the interface. The sparse-dense mode is
identical to the implicit interface mode in the PIM Version 2
specification.