656 BigIron RX Series Configuration Guide
53-1002253-01
Configuring IP multicast traffic reduction
23
Regardless of the administrative distances, the BigIron RX Series router always prefers directly
connected routes over other routes.
FIGURE 98 Example multicast static routes
To add a static route to a virtual interface, enter commands such as the following.
BigIron RX(config)# ip mroute 3 0.0.0.0 0.0.0.0 ve 1 distance 1
BigIron RX(config)# write memory
Configuring IP multicast traffic reduction
In Layer 2 mode, BigIron RX forwards all IP multicast traffic by default based on the Layer 2
information in the packets. Optionally, you can enable the BigIron RX to make forwarding decisions
in hardware, based on multicast group by enabling the IP Multicast Traffic Reduction feature.
The IP Multicast Traffic Reduction feature is applicable for Layer 2 mode only.
When this feature is enabled, the BigIron RX examines the MAC address in an IP multicast packet
and forward the packet only on the ports from which the device has received Group Membership
reports for that group, instead of forwarding all multicast traffic to all ports. The device sends traffic
for other groups out all ports.
Server
PIM Router A
PIM Router B
PIM Router C
PIM Router D
Client
Client
Multicast group
239.255.162.1
9.9.9.101
e6/14
e4/11
207.95.6.1
e1/5
207.95.8.10
e1/8
207.95.8.1
e3/19
209.157.24.62
Multicast group
239.255.162.1
Multicast group
239.255.162.1
e3/11
8.8.8.164
e1/4
207.95.7.1
e2/3
207.95.7.2
e1/2
207.95.6.2
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