Cisco Catalyst 4500 Series Software Configuration Guide

CHAPTER
20-1
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
20
Configuring EVC-Lite
This document describes how to configure EVC-Lite, which is a lite version of the Ethernet Virtual
Connections (EVC) feature on Supervisor Engine 7L-E. The associated command pages are also
provided.
The document details:
• About EVC-Lite, page 20-1
• How to Configure EVC-Lite, page 20-2
Note For complete syntax and usage information for the switch commands used in this chapter, see the
Cisco IOS Command Reference Guides for the Catalyst 4500 Series Switch.
If a command is not in the Cisco Catalyst 4500 Series Switch Command Reference , you can locate it in
the Cisco IOS Master Command List, All Releases.
About EVC-Lite
Ethernet virtual circuits (EVCs) define a Layer 2 bridging architecture that supports Ethernet services.
An EVC is defined by the Metro-Ethernet Forum (MEF) as an association between two or more user
network interfaces that identifies a point-to-point or multipoint-to-multipoint path within the service
provider network. An EVC is a conceptual service pipe within the service provider network. A bridge
domain is a local broadcast domain that exists separately from VLANs.
A Catalyst 4500 series switch comprises of two bridge domains (BDs), BD 0 and BD 1. By default, all
ports belong to BD 0 and you can move them to BD 1 manually.
EVC-Lite supports 8K VLANs using the existing support of 8K Internal VLANs, segregated under the
two BDs, where each BD has its own representation of 4K VLANs.
A system can have two types of VLAN's: EVC-Lite and non EVC-Lite (the default). Ordinary VLANs
are VLANs without awareness of any BDs (the situation that exists when the feature is not enabled).
EVC-Lite VLANs are treated differently in different bridge domains (e.g the same VLAN 2 is treated
differently in BD 0 and BD 1).
A port can support both EVC-Lite and non EVC-Lite VLANs. EVC-Lite VLANs that are part of BD 1
are mapped to an internal VLAN ID as VLAN ID + 4096. Remaining VLANs are not mapped internally.

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