Technical data

BLADEOS 6.3 Command Reference
278
 Chapter 4: Configuration Commands BMD00186-B, April 2010
Spanning Tree Port Configuration
By default, Spanning Tree is turned off for management ports, and turned on for data ports.
STG port parameters include:
 Port priority
 Port path cost
For more information about port Spanning Tree commands, see “Port Spanning Tree
Configuration” on page 249.
Table 164 Spanning Tree Port commands
Command Syntax and Usage
spanning-tree stp <STG number> priority <0-255>
Configures the port priority. The port priority helps determine which bridge port becomes the
designated port. In a network topology that has multiple bridge ports connected to a single
segment, the port with the lowest port priority becomes the designated port for the segment.
The default value is 128.
RSTP/MSTP: The range is 0 to 240, in steps of 16 (0, 16, 32...) and the default is 128.
Command mode: Interface port
spanning-tree stp <STG number> path-cost <1-65535, 0 for default)>
Configures the port path cost. The port path cost is used to help determine the designated port
for a segment. Port path cost is based on the port speed, and is calculated as follows:
 1Gbps = 4
 10Gbps = 2
The default value of 0 (zero) indicates that the default path cost will be computed for an auto
negotiated link speed.
Command mode: Interface port
spanning-tree stp link-type {auto|p2p|shared}
Defines the type of link connected to the port, as follows:
 auto: Configures the port to detect the link type, and automatically match its settings.
 p2p: Configures the port for Point-To-Point protocol.
 shared: Configures the port to connect to a shared medium (usually a hub).
Command mode: Interface port