Table of Contents
Advertisement
A
Configuring Quality of Service
A.2 Traffic Shaping
unassigned value is zero.
4.
Apply to save the settings.
Click
A.2e 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.
Quality of Service in the Advanced screen, then click 802.1p Settings.
Click
The "802.1p Settings" screen appears.
© 2009 Verizon. All Rights Reserved.
198
Advertisement
Table of Contents
