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Cisco Catalyst 4500 Series Software Configuration Guide

Cisco Catalyst 4500 Series
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1-2
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 1 Product Overview
Layer 2 Software Features
Per-VLAN Rapid Spanning Tree, page 1-8
Quality of Service, page 1-9
Resilient Ethernet Protocol, page 1-10
SmartPort Macros, page 1-10
Spanning Tree Protocol, page 1-10
Stateful Switchover, page 1-10
SVI Autostate, page 1-11
Unidirectional Link Detection, page 1-11
VLANs, page 1-11
Virtual Switching Systems (Catalyst 4500-X and Supervisor Engine 7-E, 7L-E, and 8-E), page 1-12
Virtual Switch System Client, page 1-12
Y.1731 (AIS and RDI), page 1-13
802.1Q Tunneling, VLAN Mapping, and Layer 2 Protocol Tunneling
802.1Q tunneling is a Q-in-Q technique that expands the VLAN space by retagging the tagged packets
that enter the service provider infrastructure. 802.1Q tunneling allows service providers to assign a
VLAN to each customer without losing the original customer VLAN IDs inside the tunnel. All data
traffic that enters the tunnel is encapsulated with the tunnel VLAN ID. Layer 2 Protocol Tunneling is a
similar technique for all Layer 2 control traffic.
To map customer VLANs to service-provider VLANs, you can configure VLAN mapping (or VLAN ID
translation) on trunk ports connected to a customer network. Packets entering the port are mapped to a
service provider VLAN (S-VLAN) based on the port number and the original customer VLAN-ID
(C-VLAN) of the packet.
For information on configuring 802.1Q tunneling and VLAN Mapping, see Chapter 30, “Configuring
802.1Q Tunneling, VLAN Mapping, and Layer 2 Protocol Tunneling.
Cisco IOS Auto Smartport Macros
Cisco IOS Auto SmartPort macros dynamically configure ports based on the device type detected on the
port. When the switch detects a new device on a port it applies the appropriate Cisco IOS Auto
Smartports macro. When a link-down event occurs on the port, the switch removes the macro. For
example, when you connect a Cisco IP phone to a port, Cisco IOS Auto SmartPorts automatically applies
the IP phone macro. The IP phone macro enables quality of service (QoS), security features, and a
dedicated voice VLAN to ensure proper treatment of delay-sensitive voice traffic.
For information on configuring SmartPort macros, see Chapter 22, “Configuring Cisco IOS Auto
Smartport Macros.
Cisco Discovery Protocol
The Cisco Discovery Protocol (CDP) is a device-discovery protocol that is both media- and
protocol-independent. CDP is available on all Cisco products, including routers, switches, bridges, and
access servers. Using CDP, a device can advertise its existence to other devices and receive information

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Cisco Catalyst 4500 Series Specifications

General IconGeneral
SeriesCatalyst 4500 Series
CategorySwitch
Layer SupportLayer 2, Layer 3
Form FactorModular chassis
StackableNo
Chassis Slots3, 6, 7, 10
Power Supply OptionsAC, DC
RedundancyPower supply, Supervisor engine
Network ManagementCisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
FeaturesSecurity, QoS
Port DensityUp to 384 ports per chassis
Security Features802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine8-E

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