Actiontec MI424WR User Guide - Page 166

Quality of Service, Settings

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Appendix A Quality of Service 802.1p Settings The IEEE 802.1p priority marking method is a standard for prioritizing network traffic at the data link/Mac sub-layer. 802.1p traffic is simply classified and sent to the destination, with no bandwidth reservations established. The 802.1p header includes a 3-bit prioritization field, which allows packets to be grouped into eight levels of priority. By default, the highest priority is seven, which might be assigned to network-critical traffic. Values five and six may be applied to delay-sensitive applications such as interactive video and voice. Data classes four through one range from controlled-load applications down to "loss eligible" traffic. Zero is the value for unassigned traffic and used as a best effort default, invoked automatically when no other value has been set. A packet can match more than one rule. This means that: • The first class rule has precedence over all other class rules (scanning is stopped once the first rule is reached). • The first traffic-priority (classless) rule has precedence over all other traffic priority rules. • There is no prevention of a traffic-priority rule conflicting with a class rule. In this case, the priority and DSCP setting of the class rule (if given) will take precedence. 1. Click Quality of Service at the top of the Home screen, then click 802.1p Settings. The "802.1p Settings" screen appears. 2. The eight 802.1p values are pre-populated with the three priority levels: Low, Medium, and High. These levels can be changed for each of the eight values in their respective drop-down lists. 3. Click OK to save the settings. 163

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163
Appendix A
Quality of Service
802.1p Settings
The
IEEE
802.1p priority marking method is a standard for prioritizing network
traffic at the data link/Mac sub-layer. 802.1p traffic is simply classified and sent to
the destination, with no bandwidth reservations established.
The 802.1p header includes a 3-bit prioritization field, which allows packets to be
grouped into eight levels of priority. By default, the highest priority is seven, which
might be assigned to network-critical traffic. Values five and six may be applied to
delay-sensitive applications such as interactive video and voice. Data classes four
through one range from controlled-load applications down to “loss eligible” traffic.
Zero is the value for unassigned traffic and used as a best effort default, invoked
automatically when no other value has been set.
A packet can match more than one rule. This means that:
• The first class rule has precedence over all other class rules (scanning is
stopped once the first rule is reached).
• The first traffic-priority (classless) rule has precedence over all other traffic
priority rules.
• There is no prevention of a traffic-priority rule conflicting with a class rule.
In this case, the priority and
DSCP
setting of the class rule (if given) will
take precedence.
1.
Click
Quality of Service
at the top of the Home screen, then click
802.1p
Settings
. The “802.1p Settings” screen appears.
2.
The eight 802.1p values are pre-populated with the three priority levels: Low,
Medium, and High. These levels can be changed for each of the eight values in
their respective drop-down lists.
3.
Click
OK
to save the settings.