user manual

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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 48 Configuring IP Multicast Routing
Configuring Advanced DVMRP Interoperability Features
Figure 48-9 Router Rejects Nonpruning DVMRP Neighbor
Note that the ip dvmrp reject-non-pruners interface configuration command prevents peering with
neighbors only. If there are any nonpruning routers multiple hops away (downstream toward potential
receivers) that are not rejected, a nonpruning DVMRP network might still exist.
Beginning in privileged EXEC mode, follow these steps to prevent peering with nonpruning DVMRP
n
eighbors. This procedure is optional.
To disable this function, use the no ip dvmr
p reject-non-pruners interface configuration command.
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Router A
Router B
RP
Multicast
traffic gets
to receiver,
not to leaf
DVMRP
device
Source router or RP
Leaf nonpruning DVMRP device
Configure the ip dvmrp
reject-non-pruners command
on this interface.
Receiver
Layer 3 switch
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Specify the interface connected to the nonpruning DVMRP neighbor,
and enter interface configuration mode.
Step 3
ip dvmrp reject-non-pruners Prevent peering with nonpruning DVMRP neighbors.
Step 4
end Return to privileged EXEC mode.
Step 5
show running-config Verify your entries.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.