Cisco 7246VXR - uBR Router Software Configuration Manual page 64

Supported Software Features for the Cisco uBR7200 Series
Cisco Network-Based Application Recognition (NBAR)
Cisco IOS Release 12.1(10)EC added support for Cisco IOS Network-Based Application Recognition
(NBAR). The NBAR feature is a new classification engine that can recognize a wide variety of network
applications, including Web-based applications, client/server applications, and other difficult-to-classify
protocols that dynamically assign TCP or UDP port numbers.
NBAR enhances existing methods of application-recognition by adding several new classification features:
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NBAR can also classify static port protocols. Although access control lists (ACLs) can also be used for
this purpose, NBAR is easier to configure and can provide other options and classification statistics that
are not available when using ACLs.
After NBAR recognizes an application, the Cisco uBR7200 series router can invoke specific services
appropriate for that application. These services can provide QoS features such as:
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The Cisco IOS NBAR feature can also be used to detect and respond to denial-of-service and other types
of network attacks. Cisco IOS NBAR uses a protocol description language module (PDLM) to define the
rules by which the NBAR processes recognize an application. New PDLM definitions can usually be
loaded without the need for a Cisco IOS software upgrade or a router reboot, allowing for a rapid
response to discovered attacks.
For basic information on configuring and using the Cisco IOS NBAR feature, see the
Note
Application Recognition
For information on configuring NBAR for Quality of Service (QoS) control, see the
Network-Based Application Recognition"
Solutions Configuration Guide.
These documents are available on Cisco.com and the Customer Documentation CD-ROM.
Cisco.com also contains a technical note,
Tip
Control Lists for Blocking the Code Red
denial-of-service attacks. Registration and login is required to view this document.
RTP Header Compression
Real-Time Transport Protocol (RTP) is the Internet Standard (RFC 1889) protocol for the transport of
real-time data. It is intended to provide end-to-end network transport functions for applications that
support audio, video, or simulation data over multicast or unicast network services.
RTP provides support for real-time conferencing of groups of any size within the Internet. This support
includes source identification and support for gateways such as audio and video bridges as well as
multicast-to-unicast translators. RTP offers QoS feedback from receivers to the multicast group, and
support for the synchronization of different media streams.
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
1-46
Classification of applications that use statically assigned TCP/UDP port numbers, that use
dynamically assigned TCP/UDP port numbers, or that use protocols other than TCP and UDP
Classification of HTTP traffic by URL, host, or MIME type
Classification of Citrix ICA traffic by application name
Classification of application traffic using subport information
Guaranteed bandwidth
Bandwidth limits
Traffic shaping
Packet coloring
feature module.
Chapter 1
chapter of theCisco IOS Release 12.2 Quality of Service
Using Network-Based Application Recognition and Access
Worm, that provides information on using NBAR to block
Overview of Cisco uBR7200 Series Software
Network-Based
"Configuring
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