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9-31
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 9 Configuring Resource Management
Configuring Physical and Logical Interface Parameters
Configuring the ATM Default CDVT and MBS
You can change the default cell delay variation tolerance (CDVT) and maximum burst size (MBS) to
request for UPC of cells received on the interface for connections that do not individually request a
CDVT or MBS value.
You can specify CDVT or MBS for PVCs through a connection traffic table row. If no CDVT or MBS is
specified in the row, then a per-interface, per-service category default is applied for purposes of usage
parameter control (UPC) on the connection.
Note For signalled connections, CDVT or MBS cannot be signalled and the defaults specified on the interface
apply.
To configure the default CDVT and MBS parameters, perform the following task, beginning in global
configuration mode:
Example
The following example shows how to change the default tolerance for received cells on VBR-RT
connections:
Switch(config)# interface atm 3/0/0
Switch(config-if)# atm cdvt-default vbr-rt 4000
Displaying the ATM CDVT and MBS Configuration
To display the ATM CDVT and MBS configuration, use the following EXEC commands:
Examples
The following example shows the ATM CDVT and MBS configuration of an ATM VC:
Switch> show atm vc interface atm 0/0/3 0 100
Interface: ATM0/0/3, Type: oc3suni
VPI = 0 VCI = 100
Status: UP
Time-since-last-status-change: 00:00:08
Connection-type: PVC
Command Purpose
Step 1
Switch(config)# interface atm card/subcard/port
Switch(config-if)#
Specifies an ATM interface and enter interface
configuration mode.
Step 2
Switch(config-if)# atm cdvt-default {cbr | vbr-rt
| vbr-nrt | abr | ubr} number
Configures the ATM CDVT default.
Step 3
Switch(config-if)# atm mbs-default {vbr-rt |
vbr-nrt} number
Configures the ATM MBS default.
Command Purpose
show atm vc Displays the ATM VC CDVT configuration.
show atm vp Displays the ATM VP CDVT configuration.