Cisco Cisco IOS Software Release 12.2(14)S

This document provides information for the Network-Based Application Recognition (NBAR) and the 
Distributed Network-Based Application Recognition (dNBAR) features. This document contains all of 
the updates made to the NBAR and dNBAR features.

Before proceeding, it is important to note that the dNBAR feature, which introduced NBAR on the 
Cisco 7500 with a Versatile Interface Processor (VIP) and the Catalyst 6000 family switch with a 
FlexWAN module, is identical in implementation to NBAR. Therefore, unless otherwise noted, the term 
NBAR is used throughout this document to describe both the NBAR and dNBAR feature. The term 
dNBAR is used only when appropriate.

This document includes information on the benefits of NBAR, supported platforms, restrictions, 
definitions, and new and revised command syntax. 

This document includes the following sections:

The purpose of IP Quality of Service (QoS) is to provide appropriate network resources (bandwidth, 
delay, jitter and packet loss) to applications. QoS maximizes the return on investments on network 
infrastructure by ensuring that mission critical applications get the required performance and 
non-critical applications do not hamper the performance of critical applications. 

12.2(8)T

The match protocol rtp command was introduced, allowing NBAR to 
classify Real-Time Transport Protocol (RTP) traffic.

The Cisco 3700 also became available. The initial release of the Cisco 
3700 supported NBAR.

12.2(14)S

NBAR and dNBAR were introduced in Cisco IOS Release 12.2S. The 
12.2S version of NBAR includes everything available on the 12.1E and 
12.2T implementations of NBAR with the exception of platform support 
for platforms not supported by 12.2S.