Y.1731 (Ais And Rdi) - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 1 Product Overview

Y.1731 (AIS and RDI)

Y.1731 ETH-AIS (Ethernet Alarm Indication Signal function) and ETH-RDI (Ethernet Remote Defect
Indication function) provides fault and performance management for service providers in large
networks.
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 switch:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Bidirectional Forwarding Detection, page 1-14
Cisco Express Forwarding, page 1-14
Device Sensor, page 1-14
EIGRP Stub Routing, page 1-14
Enhanced Object Tracking, page 1-15
GLBP, page 1-15
HSRP, page 1-16
In Service Software Upgrade, page 1-19
IP Routing Protocols, page 1-17
IPv6, page 1-20
Multicast Services, page 1-20
NSF with SSO, page 1-21
OSPF for Routed Access, page 1-21
Policy-Based Routing, page 1-22
Unicast Reverse Path Forwarding, page 1-22
Unicast Reverse Path Forwarding, page 1-22
Unidirectional Link Routing, page 1-22
VRF-lite, page 1-23
Virtual Router Redundancy Protocol, page 1-23
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 76, "Configuring Y.1731 (AIS and RDI)."
Layer 3 Software Features
1-13