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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter
Objectives
This guide explains how to configure software features on the Cisco ASR 901-TDM version and
Cisco ASR 901-Ethernet version routers. Unless otherwise stated, the features described in this guide
apply to both the routers.
Audience
This guide is for the person responsible for configuring the router. This guide is intended for the
following audiences:
• Customers with technical networking background and experience.
• System administrators who are familiar with the fundamentals of router-based internetworking, but
who may not be familiar with Cisco IOS software.
• System administrators who are responsible for installing and configuring internetworking
equipment, and who are familiar with Cisco IOS software.
Organization
The major sections of this software configuration guide are listed in the following table:
• REP over LAG—Effective with Cisco IOS Release 15.4(1)S,
the Cisco ASR 901 supports REP over port-channel.
• Switched Port Analyzer (SPAN)—Effective with Cisco IOS
Release 15.4(1)S, the Cisco ASR 901 supports Local SPAN.
Local SPAN supports a SPAN session entirely within one
switch. You can analyze network traffic passing through
ports or VLANs by using SPAN to send a copy of the traffic
to another port on the switch that has been connected to a
network analyzer or other monitoring or security devices.
SPAN copies (or mirrors) traffic received or sent (or both) on
source ports to a destination port for analysis.
• Y.1564 over EVC CrossConnect—Effective with Cisco IOS
release 15.4.(01)S, traffic can be generated over cross
connect interface. Figure 10-3 shows the Traffic Generator
topology over cross connect describing the traffic flow in the
external and internal modes.
Document
Number Date Change Summary
Chapter Description
Chapter 1, “Cisco ASR 901
Router Overview”
Provides an overview of the Cisco ASR 901 router.
Chapter 2, “Licensing” Describes the licensing aspects of the router.