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19 Spanning Tree Protocol
VLANs are set to be blocked. When Multiple Spanning Tree is running, only ports for
corresponding instances are set to be blocked, but if the corresponding port is a
boundary port, ports for all instances are set to be blocked.
Command examples
1.
(config)# interface fastethernet 0/1
(config-if)# spanning-tree guard root
(config-if)# exit
Sets root guard functionality for port 0/1.
19.13.6 Configuring link types
Link types represent the connection status of a port. The connections between switches
must be point-to-point to perform high-speed status transitions for Rapid PVST+, Rapid
STP for Single Spanning Tree, or Multiple Spanning Tree. For shared types, high-speed
status transitions are not performed, and status transitions are performed by timer as with
PVST+ and STP for Single Spanning Tree.
Points to note
A connection status can be set for each port. If it is not set, point-to-point is used
when the port is a full duplex connection, and shared is used when it is a half duplex
connection.
Command examples
1.
(config)# interface fastethernet 0/1
(config-if)# spanning-tree link-type point-to-point
(config-if)# exit
Causes port 0/1 to run as a point-to-point connection.
Notes
For configurations where the actual network connection type is not a 1-to-1
connection, do not use this command to specify point-to-point. In configurations
other than 1-to-1 connections, at least two Spanning Tree switches neighbor a single
port.
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