Cisco Cisco MGX 8850 Modules Fehlerbehebungsanleitung

Introduction
 Prerequisites
      Requirements
      Components Used
      Conventions
 Reduce Queuing Delays
 Reduce the Effects of Trunk Failures
 Related Information

Because Systems Network Architecture (SNA) traffic and applications are delay−sensitive, many users want
to optimize the flow of SNA within their network. Such optimizations fall into two categories:

Reducing queuing delays

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Reducing the effect of trunk failures

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There are no specific requirements for this document.

This document is not restricted to specific software and hardware versions.

The information in this document was created from the devices in a specific lab environment. All of the
devices used in this document started with a cleared (default) configuration. If your network is live, make sure
that you understand the potential impact of any command.

For more information on document conventions, refer to the Cisco Technical Tips Conventions.

Configure SNA permanent virtual circuits (PVCs) so that the %util = 100 and the minimum information rate
(MIR) equal the desired committed information rate (CIR) of the connection. This allows ForeSight to
maintain very short trunk queue depths.

Configure all SNA PVCs as high priority PVCs. This allows SNA traffic to receive preferential
treatment in the Frame Relay packet assembler/disassembler (PAD) card (FRP) egress queue.

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Set MIR=CIR=peak−rate−bps (PIR) (to as high a value as possible). This allows the connection to
receive CBR−like (or leased−line−like) performance.

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