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06.22.2008 at 09:13PM PDT, ID: 23506576
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6.4

QoS Design Guide

Asked by netdoc01 in Network Design & Methodology, Network Routers, Network Switches & Hubs

Tags: , , ,

Hello all,

I read the White Paper, Enterprise QoS Solution Reference Network Design, and I understand the concept of classifying, marking, policing, and scheduling. However, I am still have a few questions:
1. Based on the my policy-map sample below, if you add the bandwidth percentage together, only 80% of the bandwidth will be used for scheduling. What will happen to the left-over 20% of the bandwidth? Does it mean that no traffic will be using the 20% and I am wasting the bandwidth?

policy-map wan-edge
 class marked-voice
  priority percent 25 200000
 class marked-video
  bandwidth percent 10
 class marked-callsig
  bandwidth percent 5
 class marked-critical-data
  bandwidth percent 20
 class marked-network-control
  bandwidth percent 5
 class marked-bulk-data
  bandwidth percent 4
 class marked-scavenger
  bandwidth percent 1
 class class-default
  bandwidth percent 10

2. In the white paper, Cisco talked about QoS for voice, video, and data. What if I only have critical data to prioritize? Can I have only critical data class (35% of total bandwidth) and default class (65% of total bandwidth)?

3. If I enable QoS with the scheduling in question 1 and my only traffic at that moment is the default class traffic. Will QoS allows me to use more than 10% of the bandwidth (up to 65% as the traffic cannot use the 20% of the priority bandwidth?

Thanks
NetDoc01Start Free Trial
[+][-]06.22.2008 at 09:45PM PDT, ID: 21843544

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About this solution

Zones: Network Design & Methodology, Network Routers, Network Switches & Hubs
Tags: Cisco, Cisco, Cisco router, 7206
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Solution Provided By: donmanrobb
Participating Experts: 2
Solution Grade: B
 
 
[+][-]06.23.2008 at 06:57AM PDT, ID: 21846230

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