Shiro ADSL 2/2+ Ethernet Modem User Manual

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User Manual 
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Layer 2 
The Egress Layer 2 page allows you to map the CoS of an outgoing packet to user priority bits, which is 
honored by the VLAN network. Again, this feature is only configurable on the WAN interfaces as VLAN 
is only supported on the WAN side in the current release. 
 
Layer 2 
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 
Packet 
Some locally generated packets might not have been classified and thus do not have a CoS 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 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.