Cisco Catalyst 4500 Series Software Configuration Guide

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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 PVST+ Simulation
To enable PVST+ simulation on a port, perform this task:
This example shows how to prevent a port from automatically interoperating with a connecting device
that is running Rapid PVST+:
Switch(config)# interface gi3/13
Switch(config-if)# spanning-tree mst simulate pvst disable
The following sample output shows the system message you receive when a SSTP BPDU is received on
a port and PVST+ simulation is disabled:
Message
SPANTREE_PVST_PEER_BLOCK: PVST BPDU detected on port %s [port number].
Severity
Critical
Explanation
A PVST+ peer was detected on the specified interface on the switch. PVST+ simulation
feature is disabled, as a result of which the interface was moved to the spanning tree
Blocking state.
Action
Identify the PVST+ switch from the network which might be configured incorrectly.
The following sample output shows the system message you receive when peer inconsistency on the
interface is cleared:
Message
SPANTREE_PVST_PEER_UNBLOCK: Unblocking port %s [port number].
Severity
Critical
Explanation
The interface specified in the error message has been restored to normal spanning tree
state.
Action
None.
Command Purpose
Step 1
Switch# configure terminal
Enters the global configuration mode.
Step 2
Switch(config)# interface {type slot/port}
Selects a port to configure.
Step 3
Switch(config-if)# spanning-tree mst simulate
pvst
Enables PVST+ simulation on the specified interface.
To prevent a specified interface from automatically
interoperating with a connecting switch that is not
running MST, enter the spanning-tree mst simulate pvst
disable command.

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