Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 126)

Enabling PIM-SM on a GRE tunnel
To enable PIM-SM on a GRE tunnel interface, enter commands such as the following:
device(config)# interface tunnel 10
device(config-tnif-10)# ip pim-sparse
Syntax: [no] ip pim-sparse
Use the no form of the command to disable PIM-SM on the tunnel interface.
Enabling PIM-DM on a GRE tunnel interface
To enable PIM-DM on a GRE tunnel interface, enter commands such as the following:
device(config)# interface tunnel 10
device(config-tnif-10)# ip pim
Syntax: [no] ip pim
Use the no form of the command to disable PIM-DM on the tunnel interface.
Example point-to-point GRE tunnel configuration
A GRE Tunnel is configured between FastIron A and device B. Traffic between networks 10.10.1.0/24
and 10.10.2.0/24 is encapsulated in a GRE packet sent through the tunnel on the 10.10.3.0 network,
and unpacked and sent to the destination network. A static route is configured at each Layer 3 switch
to go through the tunnel interface to the target network.
FIGURE 16 Point-to-point GRE tunnel configuration example
The following shows the configuration commands for this example.
NOTE
The configuration examples for FastIron A and FastIron B applies only to FastIron SX devices.
Example point-to-point GRE tunnel configuration
126 FastIron Ethernet Switch Layer 3 Routing Configuration Guide
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