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


 
Configuring IP Multicast Routing
Load Splitting IP Multicast Traffic Across Equal-Cost Paths Configuration Task List
IPC-443
Cisco IOS IP Configuration Guide
If a tunnel is configured between Router A and Router B, and multicast traffic is made to reverse path
forward over the tunnel, then the multicast packets are sent encapsulated into the tunnel as unicast
packets between Router A and Router B. The underlying unicast mechanism will then perform load
splitting across the equal-cost links.
To configure load splitting across tunnels, perform the tasks described in the following sections. The
tasks in the first three sections are required; the task in the remaining section is optional.
Configuring the Access Router (Required)
Configuring the Router at the Opposite End of the Tunnel (Required)
Configuring Both Routers to RPF (Required)
Verifying the Load Splitting (Optional)
Configuring the Access Router
To configure the access router end of the tunnel (the end of the tunnel near the source), use the following
commands beginning in global configuration mode. The tunnel mode is GRE IP by default.
Configuring the Router at the Opposite End of the Tunnel
After configuring the access router end of the tunnel, use the following commands on the router at the
opposite end of the tunnel beginning in global configuration mode:
Command Purpose
Step 1
Router(config)# interface tunnel number
Configures a tunnel interface.
Step 2
Router(config-if)# ip unnumbered type number
Enables IP processing without assigning an IP address
to the interface.
Step 3
Router(config-if)# ip pim {dense-mode |
sparse-mode | sparse-dense-mode}
Enables PIM on the tunnel interface.
Step 4
Router(config-if)# tunnel source {ip-address |
type number}
Configures the tunnel source.
Step 5
Router(config-if)# tunnel destination {hostname |
ip-address}
Configures the tunnel destination.
Command Purpose
Step 1
Router(config)# interface tunnel number
Configures a tunnel interface.
Step 2
Router(config-if)# ip unnumbered type number
Enables IP processing without assigning an IP address
to the interface.
Step 3
Router(config-if)# ip pim {dense-mode |
sparse-mode | sparse-dense-mode}
Enables PIM on the tunnel interface.
Step 4
Router(config-if)# tunnel source {ip-address |
type number}
Configures the tunnel source. This configuration
matches the tunnel destination at the opposite end of
the tunnel.
Step 5
Router(config-if)# tunnel destination {hostname |
ip-address}
Configures the tunnel destination. This configuration
matches the tunnel source at the opposite end of the
tunnel.