Cisco Catalyst 4500 Series Administration Guide

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Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)SG
OL-30933-01
Chapter 5 Configuring Virtual Switching Systems
In-Service Software Upgrade (ISSU) on a VSS
This example shows how to display the state and the current status of the supervisor engine during the
ISSU process:
Switch> enable
Switch# show issu state
Switch# show redundancy
Switch# show switch virtual
Verifying Redundancy Mode Before Beginning the ISSU Process
Before you begin the ISSU process, verify that the VSS is operating correctly; one supervisor engine
operates as the SSO Active and the peer supervisor engine in the other switch operating as the SSO Hot
Standby.
The following example displays verification that the system operating correctly as a VSS. Slot 1/1 (the
supervisor engine in slot 1 of Switch 1) is the active supervisor engine, and Slot 2/1 (the supervisor
engine in slot 1 of Switch 2) is the standby supervisor engine.
Switch# show redundancy states
my state = 13 -ACTIVE
peer state = 8 -STANDBY HOT
Mode = Duplex
Unit = Primary
Unit ID = 1
Redundancy Mode (Operational) = Stateful Switchover
Redundancy Mode (Configured) = Stateful Switchover
Redundancy State = Stateful Switchover
Manual Swact = enabled
Communications = Up
client count = 77
client_notification_TMR = 240000 milliseconds
keep_alive TMR = 9000 milliseconds
keep_alive count = 0
keep_alive threshold = 18
RF debug mask = 0
Switch# show redundancy
Redundant System Information :
------------------------------
Available system uptime = 11 minutes
Switchovers system experienced = 0
Standby failures = 0
Last switchover reason = none
Hardware Mode = Duplex
Configured Redundancy Mode = Stateful Switchover
Operating Redundancy Mode = Stateful Switchover
Maintenance Mode = Disabled
Communications = Up
Step 3
Switch# show redundancy
Displays current or historical status, mode, and related
redundancy information about the device.
Step 4
Switch# show switch virtual
Identifies which switch of the VSS is currently performing
the Active role, and which switch the Standby.
Command or Action Purpose

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