P
ORTS
R
EVISED
2018-09-21
QOS (Q
UALITY
OF
S
ERVICE
)
D
RAWING
N
O
. LP0991-G
2-80
N-Tron
®
Series NT24K
®
Software Manual
2.21.4
QOS
(Quality
of
Service)
The QOS decision tree chooses a frame’s output port priority and the egress frame’s IEEE 802.1p User Priority
value (if needed) based on the QOS settings and the User Priority value (if any) in the ingress frame. Both the
internal port priority setting and the egress frame User Priority value are always assigned the same value. The
available values are 0 through 7 where 7 is the highest priority. If the ingress frame is an IP packet, the RFC 2474
DSCP field in the packet will be passed unchanged to the egress frame.
Click on the
Modify
button to make changes to the QOS Configuration.
Include DSCP:
This configurable field displays the status of whether or not to include the ingress frame's RFC
2474 DSCP value in determining the transmit priority and egress frame's IEEE 802.1p User Priority value. If
the ingress frame type is IP (IPv4 or IPv6) and Include DSCP is enabled, DSCP processing will override all
other settings. (see QOS SELECTION CHART below). The default value is enabled.
Include 802.1p:
This configurable field displays the status of whether or not to include the ingress frame's
IEEE 802.1p User Priority value in determining the transmit priority and egress frame's IEEE 802.1p User
Priority value. This setting is used only if the frame type is not IP (IPv4 or IPv6) or the Include DSCP setting is
disabled. (see QOS SELECTION CHART below). The default value is enabled.
