Cisco Catalyst 4500 Series Software Configuration Guide

23-20
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 23 Configuring STP and MST
Configuring STP
Disabling Spanning Tree Protocol
To disable spanning tree on a per-VLAN basis, perform this task:
This example shows how to disable spanning tree on VLAN 200:
Switch# configure terminal
Switch(config)# no spanning-tree vlan 200
Switch(config)# end
Switch#
This example shows how to verify the configuration:
Switch# show spanning-tree vlan 200
Spanning tree instance for VLAN 200 does not exist.
Switch#
Enabling Per-VLAN Rapid Spanning Tree
Per-VLAN Rapid Spanning Tree (PVRST+) uses the existing PVST+ framework for configuration
purposes and for interaction with other features. It also supports some of the PVST+ extensions.
Note Beginning in Cisco IOS XE Release 3.8.0E and Cisco IOS Release 15.2(4)E, Per-VLAN Rapid Spanning
Tree (PVRST+) is the default STP mode on Cisco Catalyst 4500 series, Cisco Catalyst 4900M, Cisco
Catalyst 4948E and Cisco Catalyst 4948F switches.
To enable PVRST+, perform this task:
:
The following example shows how to configure PVRST+:
Switch# config t
Enter configuration commands, one per line. End with CNTL/Z.
Command Purpose
Step 1
Switch(config)# no spanning-tree vlan vlan_ID
Disables spanning tree on a per-VLAN basis.
Step 2
Switch(config)# end
Exits configuration mode.
Step 3
Switch# show spanning-tree vlan vlan_ID
Verifies that spanning tree is disabled.
Command Purpose
Step 1
Switch(config)# [no] spantree mode rapid-pvst
Enables PVRST+.
Step 2
Switch(config)# interface interface/port
Switches to interface configuration mode.
Step 3
Switch(config-if)#
spanning-tree link-type point-to-point
Sets the link-type to point-to-point mode for the port.
Step 4
Switch(config-if)# exit
Exits interface mode.
Step 5
Switch(config)# exit
Exits configuration mode.
Step 6
Switch(config-if)# clear spantree
detected-protocols mod/port
Detects any legacy bridges on the port
Step 7
Switch# show spanning-tree summary totals
Verifies the PVRST+ configuration.

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