Chapter 19
| Spanning Tree Commands
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spanning-tree
edge-port
This command specifies an interface as an edge port. Use the no form to restore the
default.
Syntax
spanning-tree edge-port [auto]
no spanning-tree edge-port
auto - Automatically determines if an interface is an edge port.
Default Setting
Auto
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
You can enable this option if an interface is attached to a LAN segment that is at the
end of a bridged LAN or to an end node. Since end nodes cannot cause forwarding
loops, they can pass directly through to the spanning tree forwarding state.
Specifying Edge Ports provides quicker convergence for devices such as
workstations or servers, retains the current forwarding database to reduce the
amount of frame flooding required to rebuild address tables during
reconfiguration events, does not cause the spanning tree to initiate reconfiguration
when the interface changes state, and also overcomes other STA-related time out
problems. However, remember that Edge Port should only be enabled for ports
connected to an end-node device.
Example
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree edge-port
Console(config-if)#
spanning-tree
link-type
This command configures the link type for Rapid Spanning Tree and Multiple
Spanning Tree. Use the no form to restore the default.
Syntax
spanning-tree link-type {auto | point-to-point | shared}
no spanning-tree link-type
auto - Automatically derived from the duplex mode setting.
point-to-point - Point-to-point link.
shared - Shared medium.
Default Setting
auto
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