Advertising Network 0.0.0.0 To Dvmrp Neighbors - Cisco WS-C3560-48PS-S Software Configuration Manual

Configuring Basic DVMRP Interoperability Features
Command
Step 11 show running-config
Step 12
copy running-config startup-config
To disable the filter, use the no ip dvmrp accept-filter access-list-number [distance] neighbor-list
access-list-number interface configuration command.
This example shows how to configure a DVMRP tunnel. In this configuration, the IP address of the
tunnel on the Cisco switch is assigned unnumbered, which causes the tunnel to appear to have the same
IP address as port 1. The tunnel endpoint source address is 172.16.2.1, and the tunnel endpoint address
of the remote DVMRP router to which the tunnel is connected is 192.168.1.10. Any packets sent through
the tunnel are encapsulated in an outer IP header. The Cisco switch is configured to accept incoming
DVMRP reports with a distance of 100 from 198.92.37.0 through 198.92.37.255.
Switch(config)# ip multicast-routing
Switch(config)# interface tunnel 0
Switch(config-if)# ip unnumbered gigabitethernet0/1
Switch(config-if)# ip pim dense-mode
Switch(config-if)# tunnel source gigabitethernet0/1
Switch(config-if)# tunnel destination 192.168.1.10
Switch(config-if)# tunnel mode dvmrp
Switch(config-if)# ip dvmrp accept-filter 1 100
Switch(config-if)# interface gigabitethernet0/1
Switch(config-if)# ip address 172.16.2.1 255.255.255.0
Switch(config-if)# ip pim dense-mode
Switch(config)# exit
Switch(config)# access-list 1 permit 198.92.37.0 0.0.0.255

Advertising Network 0.0.0.0 to DVMRP Neighbors

If your switch is a neighbor of an mrouted version 3.6 device, you can configure the software to advertise
network 0.0.0.0 (the default route) to the DVMRP neighbor. The DVMRP default route computes the
RPF information for any multicast sources that do not match a more specific route.
Do not advertise the DVMRP default into the MBONE.
Beginning in privileged EXEC mode, follow these steps to advertise network 0.0.0.0 to DVMRP
neighbors on an interface. This procedure is optional.
Command
Step 1 configure terminal
Step 2
interface interface-id
Step 3
ip dvmrp default-information
{originate | only}
Catalyst 3560 Switch Software Configuration Guide
32-40
Purpose
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Specify the interface that is connected to the DVMRP router, and enter
interface configuration mode.
Advertise network 0.0.0.0 to DVMRP neighbors.
Use this command only when the switch is a neighbor of mrouted version
3.6 machines.
The keywords have these meanings:
originate—Specifies that other routes more specific than 0.0.0.0 can
•
also be advertised.
only—Specifies that no DVMRP routes other than 0.0.0.0 are
•
advertised.
Chapter 32 Configuring IP Multicast Routing
78-16156-01