Brocade BigIron RX Series Configuration Guide - Manual (Page 747)

BigIron RX Series Configuration Guide 669
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Configuring a static multicast route
24
NOTE
In IP multicasting, a route is handled in terms of its source, rather than its destination.
You can use the ethernet <slot>/<portnum> parameter to specify a physical port or the ve <num>
parameter to specify a virtual interface.
NOTE
The ethernet <slot>/<portnum> parameter does not apply to PIM SM.
The distance <num> parameter sets the administrative distance for the route. When comparing
multiple paths for a route, the device prefers the path with the lower administrative distance.
NOTE
Regardless of the administrative distances, the device always prefers directly connected routes over
other routes.
The rpf_address <rpf-num> parameter specifies an RPF number.
The example above configures two static multicast routes. The first route is for a specific source
network, 207.95.10.0/24. If the receives multicast traffic for network 207.95.10.0/24, the traffic
must arrive on port 1/2. The second route is for all other multicast traffic. Traffic from multicast
sources other than 207.95.10.0/24 must arrive on port 2/3.
Figure 108 shows an example of an IP Multicast network. The two static routes configured in the
example above apply to this network. The commands in the example above configure PIM router A
to accept PIM packets from 207.95.10.0/24 when they use the path that arrives at port 1/2, and
accept all other PIM packets only when they use the path that arrives at port 2/3.
The distance parameter sets the administrative distance. This parameter is used by the software to
determine the best path for the route. Thus, to ensure that the device uses the default static route,
assign a low administrative distance value. When comparing multiple paths for a route, the device
prefers the path with the lower administrative distance.
FIGURE 99 Example multicast static routes
To add a static route to a virtual interface, enter commands such as the following.
BigIron RX(config)# ip mroute 0.0.0.0 0.0.0.0 ve 1 distance 1
BigIron RX(config)# write memory
PIM router A PIM router B PIM router C
Client
Multicast group
239.255.162.1 Multicast group
239.255.162.1
Server
e3/11
8.8.8.164
e1/4
207.95.7.1 e2/3
207.95.7.2 e1/5
207.95.8.10 e1/8
207.95.8.1
e3/19
209.157.24.62