EdgeSwitch-XP - Support for Quality of Service (QoS)


Overview


Readers will learn about Layer 2 (802.1p) and Layer 3 (DSCP) Quality of Service (QoS) support on the EdgeSwitch-XP

NOTES & REQUIREMENTS:
Applicable to the latest EdgeSwitch-XP firmware on the following models:
  • ES-5XP
  • ES-8XP
  • ES-16XP 

QoS Support


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In order for EdgeSwitch-XP to classify and differentiate types of traffic when applying QoS rules, the traffic must have a special value set in the IP Header DSCP field. The originating software or hardware device is responsible for applying this value, and only if this field is set will traffic be prioritized.

By default, all traffic is classified as Best Effort, meaning there is no prioritization. The other categories can be defined with the following values:

 802.1p Class of Service TOS Range DSCP Range WME Category
0 - Best Effort 0x00-0x1f 0-7 Best Effort
1 - Background 0x20-0x3f 8-15 Background
2 - Spare 0x40-0x5f 16-23 Background
3 - Excellent Effort 0x60-0x7f 24-25
28-31
Best Effort
4 - Controlled Load 0x80-0x9f 32-39 Video
5 - Video (<100ms latency) 0xa0-0xbf 40-45 Video
6 - Voice (<10ms latency) 0x68
0xb8
0xc0-0xdf
26-27
46-47
48-55
Voice
7 - Network Control 0xe0-0xff 56-63 Voice

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