Cisco Cisco IOS Software Release 12.0(23)S
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Cisco IOS Release 12.0(23)S
ATM Cell Loss Priority Setting on Cisco 12000
Series 8-Port OC-3 STM-1 ATM Line Cards
Series 8-Port OC-3 STM-1 ATM Line Cards
Feature History
This feature module describes the ATM Cell Loss Priority (CLP) setting feature. The ATM CLP setting
feature allows users to control the ATM CLP bit setting on the 8-Port OC-3 STM-1 ATM line card for
Cisco 12000 Series Internet Routers.
feature allows users to control the ATM CLP bit setting on the 8-Port OC-3 STM-1 ATM line card for
Cisco 12000 Series Internet Routers.
This document includes the following sections:
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Feature Overview
Before development of the ATM CLP Setting feature, the CLP bit in the ATM header of a cell provided
a method of controlling the discarding of cells in a congested ATM environment. A CLP bit contains two
settings: 0 or 1. Cells with a CLP bit setting of 1 are discarded before cells with a CLP bit setting of 0.
Before the introduction of the ATM CLP Setting feature, the CLP bit was automatically set to 0 when
Cisco routers converted packets into ATM cells for ATM networks.
a method of controlling the discarding of cells in a congested ATM environment. A CLP bit contains two
settings: 0 or 1. Cells with a CLP bit setting of 1 are discarded before cells with a CLP bit setting of 0.
Before the introduction of the ATM CLP Setting feature, the CLP bit was automatically set to 0 when
Cisco routers converted packets into ATM cells for ATM networks.
The ATM CLP Setting feature allows users to control the CLP bit setting on Cisco 12000 Series Internet
Routers equipped with the 8-Port OC-3 STM-1 ATM line card. The CLP bit is set on each packet
individually, and the default CLP bit setting is 0. The application of the ATM CLP Setting feature
changes the CLP bit setting to 1. Therefore, users have the option to leave each packet with the default
CLP bit setting of 0 or to establish a new CLP bit setting of 1.
Routers equipped with the 8-Port OC-3 STM-1 ATM line card. The CLP bit is set on each packet
individually, and the default CLP bit setting is 0. The application of the ATM CLP Setting feature
changes the CLP bit setting to 1. Therefore, users have the option to leave each packet with the default
CLP bit setting of 0 or to establish a new CLP bit setting of 1.
Release
Modification
12.0(23)S
This feature was made available on the 8-Port OC-3 STM-1 ATM line card
for Cisco 12000 Series Internet Routers.
for Cisco 12000 Series Internet Routers.