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40 AT-AR256E v3 - 4 Ports ADSL2/2+ Router - User Manual
Layer 2 Ingress
Layer 2 allows you to map an incoming packet with VLAN priority to CoS. This feature is only configurable
on the WAN interface as VLAN is only supported on the WAN side in the current software release.
Figure 31: Layer 2 Ingress
Field Description
Interface Select the WAN interface here to configure the CoS for incoming traffic. Only WAN
interface can be selected as VLAN is currently supported only on the WAN side.
Class of
Service
The selections are (in the order of descending priority): CoS1, CoS2, CoS3, CoS4, CoS5
and CoS6.
User Priority The selections are 0, 1, 2, 3, 4, 5, 6 and 7.
To configure Ingress Layer 2:
1. Select Advanced menu.
2. Select QoS > Ingress.
3. Select the quickstart interface.
4. Select Layer 2.
5. Select CoS1 in Class of Service and enter 5 in Priority Bits. Any packet with priority marking 5 is
mapped to CoS1, the highest priority that is normally given to voice packets.
6. Click Apply to temporarily the settings.
7. Select CoS2 in the Class of Service and 1 in Priority Bits. Any packet that has a priority bit of 1 is
mapped to CoS2, which is the second highest priority. This is given to the high priority packets such as
video.
8. Click Apply to temporarily activate the settings.
9. Repeat steps 5-7 to add more rules. Up to eight rules can be configured for each interface.
10. To make changes permanent, click Save Settings.
Any priority bits that have not been mapped to a CoS default to CoS6, the lowest priority.
Any WAN interface that is not configured has the default Untrusted mode.
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