Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
spanning-tree mst configuration
spanning-tree mst configuration
To enter the MST configuration submode, use the spanning-tree mst configuration command. To return
to the default MST configuration, use the no form of this command.
spanning-tree mst configuration
no spanning-tree mst configuration
Syntax Description This command has no arguments or keywords.
Defaults The default settings are as follows:
• No VLANs are mapped to any MST instance.
• All VLANs are mapped to the CIST instance.
• The region name is an empty string.
• The revision number is 0.
Command Modes Global configuration mode
Command History
Usage Guidelines The MST configuration consists of three main parameters:
• Instance VLAN mapping (see the instance command)
• Region name (see the name command)
• Configuration revision number (see the revision command)
By default, the value for the MST configuration is the default value for all its parameters.
The abort and exit commands allow you to exit the MST configuration submode. The difference
between the two commands depends on whether you want to save your changes or not.
The exit command commits all the changes before leaving MST configuration submode. If you do not
map the secondary VLANs to the same instance as the associated primary VLAN, when you exit the MST
configuration submode, a message displays and lists the secondary VLANs that are not mapped to the
same instance as the associated primary VLAN. The message is as follows:
These secondary vlans are not mapped to the same instance as their primary:
->3
The abort command leaves the MST configuration submode without committing any changes.
Release Modification
12.1(12c)EW Support for this command was introduced on the Catalyst 4500 series switch.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E