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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
Oversubscribing Physical and Virtual Links
Documentation Reference: Chapter 15, “Oversubscribing Physical and Virtual Links”
• atm over-subscription-factor Command, page 1-41
• Interface Oversubscription Feature, page 1-41
• ATM Virtual Circuit Oversubscription Feature, page 1-42
• map-class frame-relay Command, page 1-42
• Frame Relay PVC Oversubscription Feature, page 1-42
• Virtual LAN Oversubscription Feature, page 1-43
• queue-depth Command, page 1-43
• weight Command, page 1-43
• Weighting Feature, page 1-44
atm over-subscription-factor Command
Cisco IOS Release: Release 12.2(16)BX
Description: The atm over-subscription-factor command was introduced on the PRE2 to enable you
to oversubscribe ATM virtual circuits (VCs). The allowable oversubscription amount is 1 to 50 times the
physical transmission capacity.
Cisco IOS Release: Release 12.3(7)XI3
Description: The amount of oversubscription you can configure was increased to 500. For example, you
can oversubscribe the physical transmission capacity from 1 to 500 times.
Cisco IOS Release: Release 12.2(28)SB
Description: This command was integrated in Cisco IOS Release 12.2(28)SB.
Cisco IOS Release: Release 12.2(31)SB2
Description: This command was introduced on the PRE3 to allow the aggregate VLAN rates to exceed
the available bandwidth. The oversubscription factor is from 1 to 500.
Interface Oversubscription Feature
Cisco IOS Release: Release 12.0(25)SX
Description: The interface oversubscription feature was introduced on the PRE1 to enable you to assign
a total committed information rate (CIR) to a given port that is greater than the speed of the port.
Cisco IOS Release: Release 12.3(7)XI
Description: This feature was introduced on the PRE2 to enable you to assign a total committed
information rate (CIR) to a given port that is greater than the speed of the port.
Cisco IOS Release: Release 12.2(28)SB
Description: This feature was integrated in Cisco IOS Release 12.2(28)SB.
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