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ATM Policing by Service Category for SVC/SoftPVC
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ATM Policing by Service Category for SVC/SoftPVC

Table Of Contents

ATM Policing by Service Category for SVC/SoftPVC

Feature Overview

Benefits

Related Features and Technologies

Related Documents

Supported Platforms

Supported Standards, MIBs, and RFCs

Configuration Tasks

Configuring ATM Policing by Service Category for SVC/SoftPVC

Verifying ATM Policing by Service Category for SVC/SoftPVC

Troubleshooting Tips

Monitoring and Maintaining ATM Policing by Service Category for SVC/SoftPVC

Example: Monitoring and Maintaining ATM Policing by Service Category for SVC/SoftPVC

Configuration Examples

Example: Non-UBR Traffic Policing

Command Reference


ATM Policing by Service Category for SVC/SoftPVC


Feature History

Release
Modification

12.2(4)B

This feature was introduced on the Cisco 6400 NSP.

12.2(13)T

This command was integrated into Cisco IOS Release 12.2(13)T.


This module describes the ATM Policing by Service Category for SVC/SoftPVC feature in Cisco IOS Release 12.2(13)T and includes the following sections:

Feature Overview

Supported Platforms

Supported Standards, MIBs, and RFCs

Configuration Tasks

Monitoring and Maintaining ATM Policing by Service Category for SVC/SoftPVC

Configuration Examples

Command Reference

Feature Overview

When configured, an ATM switch at the network side of a user-to-network (UNI) interface polices the flow of cells in the forward (into the network) direction of a virtual connection. These traffic policing mechanisms are known as usage parameter control (UPC). With UPC, the switch determines whether received cells comply with the negotiated traffic management values and takes one of the following actions on violating cells:

Pass the cell without changing the cell loss priority (CLP) bit in the cell header.

Tag the cell with a CLP bit value of 1.

Drop (discard) the cell.

The ATM Policing by Service Category for SVC/SoftPVC feature enables you to specify which traffic to police, based on service category, on switched virtual circuits (SVCs) or terminating VCs on the destination end of a soft VC.

Benefits

This feature enables you to select which and how traffic is affected by UPC. For example, you can configure your switch to pass all UBR traffic, but tag all other traffic types.

Related Features and Technologies

Intelligent early packet discard (EPD)

Intelligent partial (tail) packet discard

Related Documents

ATM Switch Router Software Configuration Guide

ATM and Layer 3 Switch Router Command Reference

Guide to ATM Technology

ATM Forum UNI 3.1 Specification

Supported Platforms

This feature is supported on the node switch processor (NSP) of the Cisco 6400 carrier-class broadband aggregator.

Supported Standards, MIBs, and RFCs

Standards

None

MIBs

CISCO-ATM-IF-MIB.my—New objects were created for per-service category SVC UPC intent.

To obtain lists of supported MIBs by platform and Cisco IOS release, and to download MIB modules, go to the Cisco MIB website on Cisco.com at the following URL:

http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml

RFCs

None

Configuration Tasks

See the following sections for configuration tasks for the ATM Policing by Service Category for SVC/SoftPVC feature.

Configuring ATM Policing by Service Category for SVC/SoftPVC (Required)

Verifying ATM Policing by Service Category for SVC/SoftPVC (Optional)

Configuring ATM Policing by Service Category for SVC/SoftPVC

 
Command
Purpose

Step 1 

Switch(config)# interface atm slot/subslot/port

Selects the ATM interface.

Step 2 

Switch(config-if)# atm svc-upc-intent
[{abr | cbr | vbr-rt | vbr-nrt | ubr}]
{tag | pass | drop}


(Repeat this step for each service category and UPC mode combination.)

Specifies the UPC mode. If no service category is specified, then the UPC mode configuration is applied to all traffic types.

Verifying ATM Policing by Service Category for SVC/SoftPVC


Step 1 Enter the show atm vc or show atm vp EXEC command to display the UPC mode for a particular VC or VP.

Switch# show atm vc int atm 0/0/1 2 120

Interface:ATM0/0/1, Type:oc3suni 
VPI = 2  VCI = 120
Status:DOWN
Time-since-last-status-change:1w1d
Connection-type:PVC 
Cast-type:point-to-multipoint-leaf
Packet-discard-option:disabled
Usage-Parameter-Control (UPC):pass 
Wrr weight:2
Number of OAM-configured connections:0
OAM-configuration:disabled
OAM-states: Not-applicable
Cross-connect-interface:ATM0/0/1, Type:oc3suni 
...

Step 2 Enter the show atm interface EXEC command. If the UPC mode is not the same for all service categories, the "Svc Upc Intent" field displays "by sc."

Switch# show atm interface atm 8/0/1

Interface:     ATM8/0/1        Port-type:     oc3suni
IF Status:     UP              Admin Status:  up
Auto-config:   enabled         AutoCfgState:  completed
IF-Side:       Network         IF-type:       NNI
Uni-type:      not applicable  Uni-version:   not applicable
Max-VPI-bits:  8               Max-VCI-bits:  14
Max-VP:        255             Max-VC:        16383
ConfMaxSvpcVpi:255             CurrMaxSvpcVpi:255
ConfMaxSvccVpi:255             CurrMaxSvccVpi:255
ConfMinSvccVci:35              CurrMinSvccVci:35
Svc Upc Intent:by sc           Signalling:    Enabled
ATM Address for Soft VC:47.0091.8100.0000.0002.b9ae.9301.4000.0c84.0010.00
Configured virtual links:
  PVCLs SoftVCLs   SVCLs   TVCLs   PVPLs SoftVPLs   SVPLs Total-Cfgd Inst-Conns
      3        4       0       0       1        0       0          8          7
Logical ports(VP-tunnels):    0
Input cells:   3036674         Output cells:  3036816
5 minute input rate:            0 bits/sec,       0 cells/sec
5 minute output rate:           0 bits/sec,       0 cells/sec
Input AAL5 pkts:1982638, Output AAL5 pkts:1982687, AAL5 crc errors:0


Troubleshooting Tips

If a VC is not configured with the appropriate UPC mode, make sure that the VC was set up after the atm svc-upc-intent command was configured. Changes to the UPC mode take affect after the VC is torn down and set up again.

Monitoring and Maintaining ATM Policing by Service Category for SVC/SoftPVC

Command
Purpose

Switch# show atm interface

Displays ATM-specific information about an ATM interface.

Switch# show controllers atm slot/subslot/port

Displays information about a physical port device. Includes dropped (or discarded) cells.

Switch# show atm vc [interface atm slot/subslot/port]

Displays the configured UPC action and intelligent packet discard mechanisms, as well as the number of cells discarded due to UPC violations.


Example: Monitoring and Maintaining ATM Policing by Service Category for SVC/SoftPVC

Switch# show atm vc interface atm 3/0/1.51 51 16 

     Interface: ATM3/0/1.51, Type: oc3suni 
     VPI = 51  VCI = 16 
     Status: DOWN 
     Time-since-last-status-change: 2w0d 
     Connection-type: PVC 
     Cast-type: point-to-point 
     Packet-discard-option: enabled 
     Usage-Parameter-Control (UPC): pass 
     Wrr weight: 32 
     Number of OAM-configured connections: 0 
     OAM-configuration: disabled 
     OAM-states:  Not-applicable 
     Cross-connect-interface: ATM2/0/0, Type: ATM Swi/Proc 
     Cross-connect-VPI = 0 
     Cross-connect-VCI = 73 
     Cross-connect-UPC: pass 
     Cross-connect OAM-configuration: disabled 
     Cross-connect OAM-state:  Not-applicable 
     Encapsulation: AAL5ILMI 
     Threshold Group: 6, Cells queued: 0 
     Rx cells: 0, Tx cells: 0 
     Tx Clp0:0,  Tx Clp1: 0 
     Rx Clp0:0,  Rx Clp1: 0 
     Rx Upc Violations:0, Rx cell drops:0 
     Rx pkts:0, Rx pkt drops:0 
     Rx connection-traffic-table-index: 6 
     Rx service-category: UBR (Unspecified Bit Rate) 
     Rx pcr-clp01: 424 
     Rx scr-clp01: none 
     Rx mcr-clp01: none 
     Rx      cdvt: 1024 (from default for interface) 
     Rx       mbs: none 
     Tx connection-traffic-table-index: 6 
     Tx service-category: UBR (Unspecified Bit Rate) 
     Tx pcr-clp01: 424 
     Tx scr-clp01: none 
     Tx mcr-clp01: none 
     Tx      cdvt: none 
     Tx       mbs: none 
     No AAL5 connection registered

Configuration Examples

This section provides the following configuration example:

Example: Non-UBR Traffic Policing

Example: Non-UBR Traffic Policing

In the following example, the UBR traffic on ATM 3/0/0 is passed while all other traffic is policed:

Switch(config)# interface atm 3/0/0
Switch(config-if)# atm svc-upc-intent ubr pass
Switch(config-if)# atm svc-upc-intent cbr tag
Switch(config-if)# atm svc-upc-intent vbr-rt tag
Switch(config-if)# atm svc-upc-intent vbr-nrt tag
Switch(config-if)# atm svc-upc-intent abr drop

Command Reference

The following commands are introduced or modified in the feature or features documented in this module. For information about these commands, see the Cisco IOS Quality of Service Solutions Command Reference at http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_book.html. For information about all Cisco IOS commands, use the Command Lookup Tool at http://tools.cisco.com/Support/CLILookup or a Cisco IOS master commands list.

atm svc-upc-intent