SMC Networks TigerStack II SMC8848M User Manual

SPANNING - TREE COST
29-17
Default Setting
By default, the system automatically detects the speed and duplex mode
used on each port, and configures the path cost according to the values
shown below. Path cost “0” is used to indicate auto-configuration
mode.
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• This command is used by the Spanning Tree Algorithm to determine
the best path between devices. Therefore, lower values should be
assigned to ports attached to faster media, and higher values assigned
to ports with slower media.
• Path cost takes precedence over port priority.
• When the spanning-tree pathcost method (page 29-9) is set to short,
the maximum value for path cost is 65,535.
Example
Table 29-3 Default STA Path Costs
Port Type Link Type
IEEE 802.1D-1998
*
* Use the spanning-tree pathcost method command on page 29-9 to set the path cost
method.
IEEE 802.1w-2001
*
Gigabit
Ethernet
Full Duplex
Trunk
4
4
10,000
5,000
10G Ethernet Full Duplex
Trunk
2
2
1000
500
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree cost 50
Console(config-if)#

SMC Networks TigerStack II SMC8848M Specifications

General

Device Type	Switch
Manageable	Yes
Stackable	Yes
Switching Capacity	17.6 Gbps
Forwarding Rate	13.1 Mpps
MAC Address Table Size	8K entries
Jumbo Frame Support	Yes
Form Factor	Rack-mountable
Uplink Ports	4 x Gigabit SFP
Layer	2
Power Supply	100-240V AC, 50-60Hz
Dimensions	17.3 x 1.7 in
Operating Temperature	0°C to 40°C
Storage Temperature	-4 °F to 158 °F (-20 °C to 70 °C)
Humidity	10% to 90% (non-condensing)

Summary

SECTION I GETTING STARTED

Chapter 1 Introduction

Provides an overview of the switch and basic concepts about network switches.

Chapter 2 Initial Configuration

Describes the basic settings required to access the management interface.

SECTION II SWITCH MANAGEMENT

Chapter 3 Configuring the Switch

Describes how to configure the switch via a web browser and Command Line Interface.

Chapter 4 Basic Management Tasks

Covers basic functions for management access, displaying and upgrading software, or resetting the system.

SECTION III COMMAND LINE INTERFACE

Chapter 18 Overview of the Command Line Interface

Explains how to use the Command Line Interface (CLI) for switch management.

Chapter 19 General Commands

Details commands for controlling command access mode, configuration, and other basic functions.

SECTION IV APPENDICES

Software Specifications

Details software features, management features, and supported standards.

Troubleshooting

Provides common symptoms and actions for problems accessing the management interface.

Glossary

Provides definitions of terms used throughout the manual.