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This feature module describes an enhancement to the RADIUS VC Logging feature. It includes information on the benefits of the enhancement, supported platforms, related documents, and command reference.
This document includes the following sections:
RADIUS Virtual Circuit (VC) Logging allows the Cisco 6400 universal access concentrator (UAC) to accurately record the virtual path interface (VPI) and virtual circuit interface (VCI) of an incoming subscriber session. With RADIUS VC Logging enabled, the RADIUS network access server (NAS) port field is extended and modified to carry VPI/VCI information. This information is logged in the RADIUS accounting record created at session startup.
The feature enhancement provides a new command to display the VPI/VCI information that can be used by the RADIUS VC Logging feature.
The enhancement to the RADIUS VC Logging feature enables you to display VPI/VCI information of incoming sessions. This information can be used to track single-subscriber issues on the Cisco 6400 UAC.
The RADIUS VC Logging Enhancement is supported on the Cisco 6400 UAC.
No new or modified RFCs are supported by this feature enhancement.
Cisco IOS Release 12.0(5) DB or higher on the node switch processor (NSP).
| Command | Purpose |
|---|---|
This section documents the new command that comprises the RADIUS VC Logging Enhancement.
In Cisco IOS Release 12.0(1)T or later, you can search and filter the output for show and more commands. This functionality is useful when you need to sort through large amounts of output, or if you want to exclude output that you do not need to see.
To use this functionality, enter a show or more command followed by the "pipe" character (|), one of the keywords begin, include, or exclude, and an expression that you want to search or filter on:
Following is an example of the show atm vc command in which you want the command output to begin with the first line where the expression "PeakRate" appears:
For more information on the search and filter functionality, refer to the Cisco IOS Release 12.0(1)T CLI String Search feature module.
To display the unique ingress VC information of local VCs, use the show atm ingress EXEC command.
Syntax Description
Defaults
No default behavior or values.
Command Modes
Command History
| Release | Modification |
|---|---|
This command was introduced on the node route processor (NRP) of the Cisco 6400 UAC. |
Usage Guidelines
The information displayed by this command is used to construct NAS Port ID and NAS IP attributes in RADIUS authentication requests and accounting records when the global configuration command radius attribute nas-port format d is entered.
Examples
The following examples display the ingress local VC info:
Related Commands
PVC—permanent virtual circuit. Virtual circuit that is permanently established. PVCs save bandwidth associated with circuit establishment and tear down in situations where certain virtual circuits must exist all the time.
RADIUS—Remote Access Dial-In User Service. Database for authenticating modem and ISDN connections and for tracking connection time.
VC—virtual circuit. Logical circuit created to ensure reliable communication between two network devices. A virtual circuit is defined by a VPI/VCI pair, and can be either permanent (PVC) or switched (SVC).
VCI—virtual channel identifier. Sixteen-bit field in the header of an ATM cell. The VCI, together with the VPI, is used to identify the next destination of a cell as it passes through a series of ATM switches on its way to its destination.
VPI—virtual path identifier. Eight-bit field in the header of an ATM cell. The VPI, together with the VCI, is used to identify the next destination of a cell as it passes through a series of ATM switches on its way to its destination.
Posted: Fri Jan 17 01:41:08 PST 2003
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