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Table Of Contents
Supported Standards, MIBs, and RFCs
Configuring PXF Logical Interface Options
Verifying PXF Logical Interface Options Settings
Monitoring and Maintaining PXF Logical Interface Options
Changing PXF Logical Interface Options from the Default Settings Example
Changing PXF Logical Interface Options to the Default Settings Example
Verifying PXF Logical Interface Options Settings Example
show pxf max-logical-interfaces
PXF Logical Interface Options
Feature History
This document describes the PXF Logical Interface Options feature introduced in Cisco IOS Release 12.2(20)S5. It contains the following sections:
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Supported Standards, MIBs, and RFCs
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Feature Overview
On the Cisco 7304 router using an NSE-100, the PXF processing path was enhanced in Cisco IOS Release 12.2(20)S5 to support up to 63 classes per QoS policy (previous Cisco IOS releases supported up to 23 classes per QoS policy). This enhancement, however, is only usable if the maximum number of PXF logical interfaces on the router is no more than 4,096.
By default, the Cisco 7304 router using an NSE-100 supports up to 16,384 PXF logical interfaces and up to 23 classes per QoS policy. The enhancement introduced in Cisco IOS Release 12.2(20)S5 allows the router to support more traffic classes per QoS policy if desired.
The pxf max-logical-interfaces command was introduced in Cisco IOS Release 12.2(20)S5 to allow users to choose the number of PXF logical interfaces they would like to support on their router, thereby allowing them to choose the number of QoS classes they would like to support in PXF per QoS policy on their router.
Restrictions
The configuration must be saved and the router reloaded for changes to the pxf max-logical-interfaces setting to take effect.
Related Documents
For information on PXF features on the Cisco 7304 router, see the Cisco 7304 Router Troubleshooting and Configuration Notes document.
Supported Platforms
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Finding Support Information for Platforms and Cisco IOS Software Images
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.
Supported Standards, MIBs, and RFCs
Standards
None
MIBs
None
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:
http://tools.cisco.com/ITDIT/MIBS/servlet/index
If Cisco MIB Locator does not support the MIB information that you need, you can also obtain a list of supported MIBs and download MIBs from the Cisco MIBs page at the following URL:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
To access Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:
RFCs
None
Configuration Tasks
See the following sections for configuration tasks for the PXF Logical Interface Options feature. Each task in the list is identified as either required or optional.
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Configuring PXF Logical Interface Options
By default, the Cisco 7304 router using an NSE-100 supports 23 QoS traffic classes per policy in PXF and 16,384 PXF logical interfaces. The following procedure shows how to change this default setting:
If you would like to return to the initial setting after changing it, follow this procedure:
Verifying PXF Logical Interface Options Settings
The show pxf max-logical-interfaces command can be used to verify if the pxf max-logical-interfaces configuration change was accepted by the router. The output from this command provides the settings for the maximum number of classes permitted per QoS policy in PXF and the number of PXF logical interfaces as set in both the running configuration file and the startup configuration file. The settings listed in the startup configuration file are the current settings on the router; the settings listed in the running configuration will be the settings on the router when the router is reloaded.
Monitoring and Maintaining PXF Logical Interface Options
To monitor and maintain the PXF Logical Interface Options feature, use the following command:
Configuration Examples
This section provides the following configuration examples:
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Changing PXF Logical Interface Options from the Default Settings Example
By default, the Cisco 7304 router using an NSE-100 supports 23 QoS traffic classes per policy in PXF and 16,384 PXF logical interfaces. The following procedure shows how to change this default setting so that the Cisco 7304 router supports up to 63 QoS traffic classes per policy in PXF and 4,096 PXF logical interfaces.
Router(config)# pxf max-logical-interfaces 4k
Router(config)# exit
Router# copy running-config startup-configRouter# reload
Changing PXF Logical Interface Options to the Default Settings Example
By default, the Cisco 7304 router using an NSE-100 supports 23 QoS traffic classes per policy in PXF and 16,384 PXF logical interfaces. The following procedure shows how to revert back to this setting if this setting was previously changed:
Router(config)# pxf max-logical-interfaces 16k
Router(config)# exit
Router# copy running-config startup-configRouter# reload
The following commands can also be used to revert back to the default settings if the setting was previously changed:
Router(config)# no pxf max-logical-interfaces 4k
Router(config)# exit
Router# copy running-config startup-configRouter# reload
Verifying PXF Logical Interface Options Settings Example
In the following example, the pxf max-logical-interfaces 16k command has been entered to change the setting from the previous setting of 4k. The router, however, has not been rebooted with the changes saved to the running configuration.
Router# show pxf max-logical-interfacesRunning configuration:PXF Max classes per interface: 23Max PXF interfaces: 16KStartup configuration:PXF Max classes per interface: 64Max PXF interfaces: 4KCommand Reference
This section documents new and modified commands. All other commands used with this feature are documented in the Cisco IOS Release 12.2 command reference publications.
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pxf max-logical-interfaces
To configure the maximum number of PXF logical interfaces, use the pxf max-logical-interfaces command in global configuration mode. To restore the default number of PXF logical interfaces, use the no form of this command.
pxf max-logical-interfaces [4k | 16k]
no pxf max-logical-interfaces [4k | 16k]
Syntax Description
Defaults
16k
Command Modes
Global configuration
Command History
Usage Guidelines
This command is only available on Cisco 7304 routers using an NSE-100. The NPE-G100 does not have any restrictions regarding the number of QoS classes per policy in PXF or the number of PXF logical interfaces, so this command is unnecessary on the NPE-G100.
There is a direct trade-off between the number of supported PXF logical interfaces and the number of supported QoS traffic classes per policy in PXF. If the router is configured to support 4,096 PXF logical interfaces (pxf max-logical-interfaces 4k), up to 63 QoS classes per policy can be supported in PXF. If the router is configured to support 16,384 logical interfaces (which is the default setting, or which can be restored using pxf max-logical-interfaces 16k), up to 23 QoS classes per policy can be supported in PXF.
Both the no pxf max-logical-interfaces 4k and the no pxf max-logical-interfaces 16k restore the default value of 16k.
This configuration is not accepted by the router until it is saved to the startup configuration and the router is reloaded.
Use the show pxf max-logical-interfaces command to gather information about PXF logical interface settings.
Examples
By default, the Cisco 7304 router using an NSE-100 supports 23 QoS traffic classes per policy in PXF and 16,384 PXF logical interfaces. The following procedure shows how to change this default setting so that the Cisco 7304 router supports up to 63 QoS traffic classes per policy in PXF and 4,096 PXF logical interfaces.
Router(config)# pxf max-logical-interfaces 4k
Router(config)# exit
Router# copy running-config startup-configRouter# reload
The following example shows how to restore the default setting after it has been changed:
Router(config)# pxf max-logical-interfaces 16K
Router(config)# exit
Router# copy running-config startup-configRouter# reload
The default setting can also be restored by entering the following commands:
Router(config)# no pxf max-logical-interfaces 4k
Router(config)# exit
Router# copy running-config startup-configRouter# reload
Related Commands
show pxf max-logical-interfaces
To display the configuration for the maximum number of classes permitted per QoS policy in PXF and the maximum number of PXF logical interfaces allowed on the router, enter the show pxf max-logical-interfaces command in global configuration mode.
show pxf max-logical-interfaces
Syntax DescriptionDisplays the configured maximum number of classes permitted per QoS policy in PXF and the maximum number of PXF logical interfaces.
This command has no arguments or keywords.
Defaults
No default behavior or values
Command Modes
Privileged EXEC
Command History
Usage Guidelines
The show pxf max-logical-interfaces command is used to verify if the pxf max-logical-interfaces configuration change was accepted by the router. The output from this command provides the settings for the maximum number of classes permitted per QoS policy in PXF and the number of PXF logical interfaces as set in both the running configuration file and the startup configuration file. The settings listed in the startup configuration file are the current settings on the router; the settings listed in the running configuration will be the settings on the router when the router is reloaded.
Examples
In the following example, the pxf max-logical-interfaces 16k command has been entered to change the setting from the previous setting of 4k. The router, however, has not been rebooted with the changes saved to the running configuration.
Router# show pxf max-logical-interfacesRunning configuration:PXF Max classes per interface: 23Max PXF interfaces: 16KStartup configuration:PXF Max classes per interface: 64Max PXF interfaces: 4KRelated Commands
pxf max-logical-interfaces
Configures the maximum number of PXF logical interfaces permitted on the router.