Configuration Guide User guide

FastIron Configuration Guide 1587
53-1002494-02
IP tunnel configuration
Displaying information about an
upstream neighbor device
You can view information about the upstream neighbor device for a given source IP address for IP
PIM packets. The software uses the IP route table or multicast route table to lookup the upstream
neighbor device.
The following shows example messages that the Brocade device can display with this command.
Syntax: show ip dvmrp rpf <IP address>
where <IP address> is a valid source IP address
NOTE
If there are multiple equal cost paths to the source, the show ip dvmrp rpf command output may not
be accurate. If your system has multiple equal cost paths, use the command show ip dvmrp mcache
to view information about the upstream neighbor.
Brocade(config)#router dvmrp
Brocade(config-pim-router)#disable-dvmrp
Syntax: [no] disable-dvmrp
Use the [no] version of the command to re-enable DVMRP.
Enabling DVMRP on an interface
After globally enabling DVMRP on a Layer 3 switch, enable it on each interface that will support the
protocol.
To enable DVMRP on S1 and interface 3, enter the following.
Router1(config)#router dvmrp
Router1(config-dvmrp-router)#int e 3
Router1(config-if-3)#ip dvmrp
IP tunnel configuration
IP tunnels are used to send traffic through routers that do not support IP multicasting. IP Multicast
datagrams are encapsulated within an IP packet and then sent to the remote address. Routers
that are not configured for IP Multicast route the packet as a normal IP packet. When the IP
Multicast router at the remote end of the tunnel receives the packet, the router strips off the IP
encapsulation and forwards the packet as an IP Multicast packet.
Brocade#show ip dvmrp rpf 1.1.20.2
directly connected or through an L2 neighbor
Brocade#show ip dvmrp rpf 1.2.3.4
no route
Brocade#show ip dvmrp rpf 1.10.10.24
upstream neighbor=1.1.20.1 on v21 using ip route