AT-AR256E v3 4 Ports ADSL2/2+ Router User Manual
41
Layer 3 Ingress
The Layer 3 page allows you to map ToS bits of incoming packets from the IP network to CoS for each
WAN/LAN interface.
Figure 32: Layer 3 Ingress
Field
Description
Interface
For both WAN and LAN interfaces, you can configure QoS for layer 3 (IP) data traffic.
Class of
Service
This CoS field allows you to map incoming layer 3 WAN/LAN packets to one of the
following CoS (in the order of descending priority): CoS1, CoS2, CoS3, CoS4, CoS5 and
CoS6.
ToS
The Type of Service field takes values from 0 to 255.
Default
Non-IP
A static CoS can be assigned to all layer 3 incoming packets (per interface) that do not
have a IP header, such as PPP control packets and ARP packets. The default is CoS1
(recommended).
To configure Ingress Layer 3:
11.
Select
Advanced
menu.
12.
Select
QoS > Ingress
.
13.
Select the
quickstart
interface.
14.
Select
Layer 3
.
15.
Select
CoS1
in
Class of Service
and enter
22
in
Type of Service
(ToS). Any incoming packet from
LAN Group 1 (layer 3) with a ToS of 22 is mapped to CoS1, the highest priority, which is normally
given to voice packets.
16.
Leave the default value CoS1 in Default Non-IP. Any incoming packet from LAN Group 1 without a IP
is mapped to CoS1, the highest priority.
17.
Click
Apply
to temporarily activate the settings.
18.
Repeat step 5-7 to add more rules to LAN Group 1. Up to 255 rules can be configured for each
interface.
19.
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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