Feature History For Frame Relay Pvc Oversubscription - Cisco 10000 Series Configuration Manual

Quality of service configuration guide

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Frame Relay PVC Oversubscription

1.544-Mbps Frame Relay circuit. The network has 18 remote sites with 128-kbps Frame Relay circuits.

The aggregate bandwidth is 2.3 Mbps:

The Central Site is oversubscribed by 50 percent. However, this configuration is valid because:

Aggregate bandwidth

of remotes exceed egress

Central site

Feature History for Frame Relay PVC Oversubscription

Cisco IOS Release

Release 12.3(7)XI1

Release 12.2(28)SB

Cisco 10000 Series Router Quality of Service Configuration Guide

shows a Frame Relay network that is oversubscribed. In the figure, the Central Site has a

128 kbps * 18 sites = 2.3 Mbps

The remote users require only e-mail access and the ability to transfer small files using File Transfer

Protocol (FTP).

All of the remote sites are unlikely to try to use all of the available bandwidth at the same time.

All of the remote sites are unlikely to simultaneously access the network.

Oversubscribed Frame Relay Network

18 Frame Relay

Access Devices

The Frame Relay PVC oversubscription feature was

introduced on the PRE2.

This feature was integrated in Cisco IOS

Release 12.2(28)SB for the PRE2.

Oversubscribing Physical and Virtual Links

Required PRE

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