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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 34 Configuring IP Multicast Routing
Configuring Advanced DVMRP Interoperability Features
Figure 34-14 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
neighbors:
To disable this function, use the no ip dvmrp reject-non-pruners interface configuration command.
Router A
Router B
Multilayer switch
RP
Multicast
traffic gets
to receiver,
not to leaf
DVMRP
device
44971
Source router or RP
Leaf nonpruning DVMRP device
Configure the ip dvmrp
reject-non-pruners command
on this interface.
Receiver
Si
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode, and specify the interface connected
to the nonpruning DVMRP neighbor.
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.
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