Displaying The Atm Qos Objective Table; Configuring The Switch Oversubscription Factor (Catalyst 8510 Msr And Lightstream 1010) - Cisco Catalyst 8540 MSR Configuration Manual

Configuring Global Resource Management

Displaying the ATM QoS Objective Table

To display the default QoS objective table, use the following EXEC command:
Command
show atm qos-defaults
The per-service category, maximum cell transfer delay, peak-to-peak cell delay variation, and maximum
cell loss ratio objectives are displayed.
Example
The ATM QoS objective table configuration is displayed in the following example:
Switch> show atm qos-defaults
Default QoS objective table:
Configuring the Switch Oversubscription Factor (Catalyst 8510 MSR and
LightStream 1010)
The switch oversubscription factor (OSF) feature on the Catalyst 8510 MSR and LightStream 1010
ATM switch routers is used in determining initial port maximum queue sizing for variable bit rate
non-real time (VBR-NRT) and available bit rate/unspecified bit rate (ABR/UBR) queues.
Note Over subscription factor configuration is only possible on switches with FC-PCQ installed.
The size of the VBR-NRT queue and ABR/UBR queues is determined by the following equations, where
the default size of the CBR and VBR-RT queues vary by interface type, as listed in
Default Size (VBR-NRT) = 0.25 * ((OSF * 2048) - DefaultSize(CBR) - DefaultSize (VBR-RT))
Default Size (ABR-UBR) = 0.75 * ((OSF * 2048) - DefaultSize(CBR) - DefaultSize (VBR-RT))
Table 9-4
Interface Type
SONET
DS3/E3
ATM Switch Router Software Configuration Guide
9-6
Max cell transfer delay (in microseconds): any cbr, any vbr-rt
Peak-to-peak cell delay variation (in microseconds): any cbr, any vbr-rt
Max cell loss ratio for CLP0 cells: any cbr, any vbr-rt, any vbr-nrt
Max cell loss ratio for CLP0+1 cells:
Default CBR and VBR Determined by Interface Type
Default Max Size CBR
Queue
256
256
Chapter 9 Configuring Resource Management
Purpose
Displays the ATM QoS objective table
configuration.
10**(-12) cbr, any vbr-rt, any vbr-nrt
Default Max Size Type
VBR-RT Queue
256
512
Table 9-4:
OL-7396-01