User guide

ADSL2+ Ethernet USB Combo Router - User Guide
Page 40 of 67
There are some additional terms you should get familiarize with:
• Ingress: Packets arriving into the router from a WAN/LAN interface.
• Egress: Packets sent from the router to a WAN/LAN interface.
•
Trusted mode: Honors the domain mapping (ToS byte, WME, WLAN
user priority).
• Untrusted mode: Does not honor domain mapping. This is the default
QoS setting.
• Traffic Conditioning Agreement (TCA): The TCA needs to be defined for
each interface:
– Ingress mappings (Domain =>CoS)
– Egress Mappings (CoS => Domain)
– By default, all interfaces are in Untrusted mode.
• Shaper
4.5.18 Egress
For packets going out of the router, the marking (CoS) need to be translated to the mappings
understood by the network domains. The reverse CoS and domain mapping is configured using
the Egress page. This page is access by selecting Egress on the Advanced main page under QoS.
4.5.18.1
No Egress Mode
The default Egress page setting for all interfaces is No Egress. In this mode, the domain
mappings of the packets are untouched.
Figure 1-28 : No Egress