10-20
Bridging—Transmitting Non-IP Traffic or Merging Two Networks
Configuring Spanning Tree
Table 10-2. Defining Edge Ports
This global configuration mode command defines all interfaces assigned to a
bridge group as edge ports:
Syntax: spanning-tree edgeport default
The default setting is no spanning-tree edgeport default. In the default
setting, interfaces do not act as edge ports. Generally, you should leave this
global setting and simply override it for the interface that connects to the end
device.
Note The command to enable an Ethernet interface to act as an edge port is slightly
different from the command to enable Frame Relay or ATM subinterfaces to
act as edge ports.
To override the global setting for Ethernet interfaces, move to the Ethernet
configuration mode context and enter:
Syntax: spanning-tree edgeport [enable | disable]
Enter the command with the enable option to allow the interface to act as an
edge port. If you have configured a global setting that defines all interfaces as
edge ports, the disable option overrides this setting.
Function Command Syntax CLI Context
define all spanning tree interfaces on the
router as edge ports
spanning-tree edgeport default global configuration mode
define all spanning tree interfaces on the
router as non-edge ports (default
setting)
no spanning-tree edgeport default global configuration mode
enable an Ethernet interface to act as an
edge port (overrides global setting)
spanning-tree edgeport enable Ethernet interface configuration mode
prevent an Ethernet interface from
acting as an edge port (overrides global
setting)
spanning-tree edgeport disable Ethernet interface configuration mode
enable a Frame Relay or ATM
subinterface to act as an edge port
(overrides global setting)
spanning-tree edgeport Frame Relay or ATM subinterface
configuration mode
prevent a Frame Relay or ATM
subinterface from acting as an edge port
(overrides global setting)
no spanning-tree edgeport Frame Relay or ATM subinterface
configuration mode
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