Ingress; Figure 29: Layer 3 Egress - Allied Telesis AT-AR256E User Manual

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Field Description
Interface Select the WAN interface to configure the QoS for outgoing packets; LAN interface cannot be
selected as VLAN is currently supported on the WAN side only.
Unclassified Some locally generated packets might not have been classified and thus do not have a CoS
Packet value, such as PPP control packet and ARP packet. You can define the CoS for all unclassified
outgoing packets on layer 2 using this field, which will then pick up the user priority bits based
on the mapping rules you create. The selections are (in the order of descending priority):
CoS1, CoS2, CoS3, CoS4, CoS5 and CoS6. The default value is CoS1 (recommended).
Class of The selections are (in the order of descending priority): CoS1, CoS2, CoS3, CoS4, CoS5 and
Service CoS6.
User Priority The selections are 0, 1, 2, 3, 4, 5, 6 and 7.
Layer 3Egress
Egress Layer 3 enables you to map CoS to ToS so that the priority marking of outgoing packets can be
carried over to the IP network.
Field Description
Interface Select the WAN interface to configure the QoS for outgoing packets; LAN interface
cannot be selected as VLAN is currently supported on the WAN side only.
Default Locally generated packets (such as ARP packets) do not have a CoS marking. You can
Non-IP define the CoS for all unclassified outgoing packets on layer 3 using this field. The
selections are (in the order of descending priority): CoS1, CoS2, CoS3, CoS4, CoS5 and
CoS6. The default value is CoS1 (recommended).
Class of The selections are (in the order of descending priority): CoS1, CoS2, CoS3, CoS4, CoS5
Service and CoS6.
Translated The Type of Service field takes values from 1 to 255. The selections are 0, 1, 2, 3, 4, 5, 6
TOS and 7.

Ingress

Ingress enables you to configure QoS for packets as soon as they come into the router. The domain
mappings are converted to CoS (the common language) so that the priority marking is carried over.
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AT-AR256E v3 - 4 Ports ADSL2/2+ Router - User Manual

Figure 29: Layer 3 Egress