Cisco Catalyst 4500 Series Software Configuration Guide

11-6
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 11 Configuring Supervisor Engine Redundancy Using RPR and SSO on Supervisor Engine 6-E and Supervisor
Supervisor Engine Redundancy Guidelines and Restrictions
Step 4 Reload the standby supervisor engine with the redundancy reload peer command.
• If you configure Supervisor Engine V-10GE to use both Gigabit Ethernet and 10-Gigabit Ethernet
uplinks without WS-X4302-GB in slot 10, module 10 is disabled and you cannot rollback the
configuration to use gigabit ports.
Enter the following commands to recover:
config t
hw-module uplink select tengigabitethernet // This sets the switch back to default
mode
!
ctrl z
wr me
redundancy reload shelf // The switch will reload with all 10 modules working ok
//The switch reloads
config t
hw-module uplink select gigabitethernet // This sets the switch to the desired link
!
ctrl z
wr me
redundancy reload shelf // The switch reloads with module 10 active with the gigabit
ethernet port(s) ON and the ten gigabit ethernet port(s) Off
• RPR requires Cisco IOS Release 12.1(12c)EW, Release 12.1(19)E or later releases. SSO requires
Cisco IOS Release 12.2(20)EWA or later releases.
• The Catalyst 4507R switch and the 4510R switch are the only Catalyst 4500 series switches that
support supervisor engine redundancy.
• In Cisco IOS Release 12.2(25)SG and later releases on a Catalyst 4507R series switch, 10-Gigabit
Ethernet and Gigabit Ethernet uplinks are concurrently usable.
• Redundancy requires both supervisor engines in the chassis to have the same components (model,
memory, NFL daughter card), and to use the same Cisco IOS software image.
• When the WS-X4516 active and redundant supervisor engines are installed in the same chassis, the
four uplink ports (Gig1/1, Gig2/1, Gig 1/2, and Gig2/2) are available.
• The active and redundant supervisor engines in the chassis must be in slots 1 and 2.
• Each supervisor engine in the chassis must have its own flash device and console port connections
to operate the switch on its own.
• Each supervisor engine must have a unique console connection. Do not connect a Y cable to the
console ports.
• Supervisor engine redundancy does not provide supervisor engine load balancing.
• The Cisco Express Forwarding (CEF) table is cleared on a switchover. As a result, routed traffic is
interrupted until route tables reconverge. This reconvergence time is minimal because the SSO
feature reduces the supervisor engine redundancy switchover time from 30+ seconds to subsecond,
so Layer 3 also has a faster failover time if the switch is configured for SSO.
• Static IP routes are maintained across a switchover because they are configured from entries in the
configuration file.
• Information about Layer 3 dynamic states that is maintained on the active supervisor engine is not
synchronized to the redundant supervisor engine and is lost on switchover.

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