Layer 3 Software Features - Cisco Catalyst 4500 Series Configuration Manual

Chapter 1 Product Overview
ETH-AIS suppresses alarms following detection of defect conditions at the server (sub) layer. Due to
independent restoration capabilities provided within the Spanning Tree Protocol (STP) environments,
ETH-AIS is not expected to be applied in the STP environments. In this case, AIS is configurable, and
the administrator describes how to enable and disable AIS in STP environment or not.
ETH-RDI can be used by a MEP to communicate to its peer MEPs that a defect condition has been
encountered. ETH-RDI is used only when ETH-CC transmission is enabled.
For information about Y.1731, see

Layer 3 Software Features

A Layer 3 switch is a high-performance switch that has been optimized for a campus LAN or an intranet,
and it provides both wirespeed Ethernet routing and switching services. Layer 3 switching improves
network performance with two software functions: route processing and intelligent network services.
Compared to conventional software-based switches, Layer 3 switches process more packets faster by
using application-specific integrated circuit (ASIC) hardware instead of microprocessor-based engines.
The following sections describe the key Layer 3 switching software features on the Catalyst 4500 series
switch:
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Bidirectional Forwarding Detection
Support on the Catalyst 4500E is limited. Starting with Cisco IOS Release IOS 15.1(1)SG, Bidirectional
Note
Forwarding Detection (BFD) is supported only on Catalyst 4900M and Catalyst 4948E Ethernet
switches.
OL-25340-01
Bidirectional Forwarding Detection, page 1-11
Cisco Express Forwarding, page 1-12
EIGRP Stub Routing, page 1-12
Enhanced Object Tracking, page 1-12
GLBP, page 1-13
HSRP, page 1-13
In Service Software Upgrade, page 1-17
IP Routing Protocols, page 1-14
IPv6, page 1-17
Multicast Services, page 1-17
NSF with SSO, page 1-18
OSPF for Routed Access, page 1-19
Policy-Based Routing, page 1-19
Unidirectional Link Routing, page 1-19
VRF-lite, page 1-20
Virtual Router Redundancy Protocol, page 1-20
Chapter 64, "Configuring Y.1731 (AIS and RDI)."
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
Layer 3 Software Features
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