User Manual
Page 3-12
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CoS1
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CoS2
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CoS3
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CoS4
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CoS5
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CoS6
The rules are:
1. CoS1 has absolute priority and is used for expedited forwarding (EF) traffic.
This is always serviced till completion.
2. CoS2-CoS5 is used for assured forwarding (AF) classes. They are serviced
in a strict round robin manner using the following priority scheme:
CoS2 > CoS3 > CoS4 > CoS5
3. CoS6 is for best effort (BE) traffic. This is only serviced when there is no
other class of service. If QoS is not enabled on your RG, all traffic will be
treated as best effort.
Additional Terms
There are some additional terms you should get familiarize
with:
• Ingress: Packets arriving into the RG from a WAN/LAN interface.
• Egress: Packets sent from the RG to a WAN/LAN interface.
• Trusted mode: Honors the domain mapping (ToS byte, WME, WLAN user
priority).
• Untrusted mode: Does not honor domain mapping. This is the default QoS
setting.
• Traffic Conditioning Agreement (TCA): The TCA needs to be defined for each
interface:
–
Ingress mappings (Domain =>CoS)
–
Egress Mappings (CoS => Domain)
–
By default, all interfaces are in Untrusted mode.
• Shaper