6381-A4 Router Users Guide
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Terms:
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Ingress: Packets arriving into the RG from a WAN/LAN interface.
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Egress: Packets sent from the RG to a WAN/LAN interface.
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Trusted mode: Honors the domain mapping (ToS byte, WME, WLAN user priority).
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Untrusted mode: Does not honor domain mapping. This is the default QoS setting.
Forwarding rules based on CoS are:
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CoS1 has absolute priority and is used for expedited forwarding (EF) traffic. This is always
serviced till completion.
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CoS2-CoS5 are used for assured forwarding (AF) classes. They are serviced in a strict round
robin manner using the following priority scheme: CoS2 > CoS3 > CoS4 > CoS5
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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.
QoS is defined in the following four GUI pages:
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Policy Database
for configuring QoS for multiple connections
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Ingress
for ingress mapping from an outside domain
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Egress
for egress mapping to an outside domain
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Shaping
for determining the servicing of the CoS queues including rate limiting.
