Cisco 10000 Series User Manual

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Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 1 Quality of Service Overview
QoS Features, Commands, and Changes
ATM Overhead Accounting
Cisco IOS Release: Release 12.2(28)SB
Description: The ATM Overhead Accounting feature was introduced on the PRE2 to enable the router
to account for various encapsulation types when applying QoS to packets. The router uses the
encapsulation type you configure to calculate the ATM overhead per packet.
Cisco IOS Release: Release 12.2(33)SB
Description: This feature was enhanced on the PRE3 to allow a user-defined number of overhead bytes.
Ethernet Overhead Accounting
Cisco IOS Release: Release 12.2(33)SB
Description: The Ethernet Overhead Accounting feature was introduced on the PRE2, PRE3, and PRE4
to enable the router to account for downstream Ethernet frame headers when applying shaping to
packets. A user-defined offset specifies the number of overhead bytes the router is to use when
calculating the overhead per packet.
Traffic Shaping Overhead Accounting for ATM
Cisco IOS Release: Release 12.2(28)SB
Description: The Traffic Shaping Overhead Accounting for ATM feature was introduced on the PRE2
to enable the broadband access system (BRAS) to account for ATM encapsulation on the subscriber line
and the overhead added by cell segmentation. This enables the service provider to prevent overruns at
the subscriber line and ensures that the router executes QoS features on the actual bandwidth used by
ATM subscriber traffic.
Cisco IOS Release: Release 12.2(31)SB2
Description: This feature was introduced on the PRE3.
Cisco IOS Release: Release 12.2(33)SB
Description: This feature was introduced on the PRE4.

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English