Contents
- Enabling Protocol Discovery
- Finding Feature Information
- Prerequisites for Enabling Protocol Discovery
- Information About Protocol Discovery
- Protocol Discovery Functionality
- How to Configure Protocol Discovery
- Enabling Protocol Discovery on an Interface
- Reporting Protocol Discovery Statistics
- Configuration Examples for Enabling Protocol Discovery
- Example Enabling Protocol Discovery on an Interface
- Example Reporting Protocol Discovery Statistics
- Where to Go Next
- Additional References
- Feature Information for Enabling Protocol Discovery
Enabling Protocol Discovery
Network-Based Application Recognition (NBAR) includes a feature called Protocol Discovery. Protocol Discovery provides an easy way to discover the application protocols that are operating on an interface. When you configure NBAR, the first task is to enable Protocol Discovery.
This module contains concepts and tasks for enabling the Protocol Discovery feature.
- Finding Feature Information
- Prerequisites for Enabling Protocol Discovery
- Information About Protocol Discovery
- How to Configure Protocol Discovery
- Configuration Examples for Enabling Protocol Discovery
- Where to Go Next
- Additional References
- Feature Information for Enabling Protocol Discovery
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Prerequisites for Enabling Protocol Discovery
Before enabling Protocol Discovery, read the information in the "Classifying Network Traffic Using NBAR" module.
Information About Protocol Discovery
Protocol Discovery Functionality
NBAR determines which protocols and applications are currently running on your network. NBAR includes a feature called Protocol Discovery. Protocol Discovery provides an easy way of discovering the application protocols that are operating on an interface so that appropriate quality of service (QoS) features can be applied. With Protocol Discovery, you can discover any protocol traffic that is supported by NBAR and obtain statistics that are associated with that protocol.
Protocol Discovery maintains the following per-protocol statistics for enabled interfaces:
- Total number of input packets and bytes
- Total number of output packets and bytes
- Input bit rates
- Output bit rates
The statistics can then be used when you later define classes and traffic policies (sometimes known as policy maps) for each traffic class. The traffic policies (policy maps) are used to apply specific QoS features and functionality to the traffic classes.
How to Configure Protocol Discovery
Enabling Protocol Discovery on an Interface
The ip nbar protocol-discoverycommand is used to enable Protocol Discovery on an interface. With Cisco IOS Release 12.2(18)ZYA, intended for use on the Cisco 6500 series switch that is equipped with a Supervisor 32/PISA, the ip nbar protocol-discovery command is supported on both Layer 2 and Layer 3 Etherchannels.
To enable Protocol Discovery on an interface, perform the following steps.
1.
enable
2.
configure
terminal
3.
interface
type
number
[name-tag]
4.
ip
nbar
protocol-discovery
5.
end
DETAILED STEPS
Reporting Protocol Discovery Statistics
To display a report of the Protocol Discovery statistics per interface, perform the following steps.
1.
enable
2.
show
policy-map
interface
type
number
3.
show
ip
nbar
protocol-discovery
[interface type number] [stats {byte-count | bit-rate | packet-count| max-bit-rate}] [protocol protocol-name | top-n number]
4.
exit
DETAILED STEPS
Configuration Examples for Enabling Protocol Discovery
Example Enabling Protocol Discovery on an Interface
In the following sample configuration, Protocol Discovery is enabled on Ethernet interface 2/4.
Router> enable
Router# configure terminal
Router(config)# interface ethernet 2/4
Router(config-if)# ip nbar protocol-discovery
Router(config-if)# end
Example Reporting Protocol Discovery Statistics
The following example displays output from the show ip nbar protocol-discoverycommand for the five most active protocols on an Ethernet interface:
Router# show ip nbar protocol-discovery top-n 5
Ethernet2/0
Input Output
----- ------
Protocol Packet Count Packet Count
Byte Count Byte Count
30sec Bit Rate (bps) 30sec Bit Rate (bps)
30sec Max Bit Rate (bps) 30sec Max Bit Rate (bps)
--------------------------- ------------------------ ------------------------
rtp 3272685 3272685
242050604 242050604
768000 768000
2002000 2002000
gnutella 513574 513574
118779716 118779716
383000 383000
987000 987000
ftp 482183 482183
37606237 37606237
121000 121000
312000 312000
http 144709 144709
32351383 32351383
105000 105000
269000 269000
netbios 96606 96606
10627650 10627650
36000 36000
88000 88000
unknown 1724428 1724428
534038683 534038683
2754000 2754000
4405000 4405000
Total 6298724 6298724
989303872 989303872
4213000 4213000
8177000 8177000
Where to Go Next
After you enable Protocol Discovery, you have the option to configure NBAR using the Modular Quality of Service (QoS) Command-Line Interface (CLI) (MQC). To configure NBAR using the MQC, see the "Configuring NBAR Using the MQC" module.
Additional References
The following sections provide references related to enabling Protocol Discovery.
Related Documents
|
Related Topic |
Document Title |
|---|---|
|
QoS commands: complete command syntax, command modes, command history, defaults, usage guidelines, and examples |
Cisco IOS Quality of Service Solutions Command Reference |
|
Concepts and information about NBAR |
"Classifying Network Traffic Using NBAR" module |
|
Configuring NBAR using the MQC |
"Configuring NBAR Using the MQC" module |
|
Adding application recognition modules (also known as PDLMs) |
"Adding Application Recognition Modules" module |
|
Creating a custom protocol |
"Creating a Custom Protocol" module |
Technical Assistance
|
Description |
Link |
|---|---|
|
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Feature Information for Enabling Protocol Discovery
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
|
Feature Name |
Releases |
Feature Information |
|---|---|---|
|
NBAR--Network-Based Application Recognition |
12.2(18)ZYA |
Integrates NBAR and Firewall Service Module (FWSM) functionality on the Catalyst 6500 series switch that is equipped with a Supervisor 32/programmable intelligent services accelerator (PISA). The following commands were modified: ip nbar protocol-discovery, show ip nbar protocol-discovery. |