802.1P; Dscp - HP nj2000 User Manual

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802.1p

The 802.1p field is held within the VLAN-tag of a packet. The field is three bits long so can
hold eight values; 0 - 7 inclusive. When QoS Mode is set to 802.1p, the 802.1p
Configuration table appears which allows a priority to be set for each of the eight values.
You can use the Prioritize Traffic drop-down list to quickly set the values in the 802.1p
Configuration table. Select All Low Priority to set all values to low priority, All Normal
Priority to set all values to normal priority, All Medium Priority to set all values to
medium priority, or select All High Priority to set all values to high priority. Use Custom
if you want to set each value individually.
Note: Because end-stations, like PCs, are not usually VLAN aware, they do not create
VLAN-tagged frames. As a result, this method of prioritization is not ideal when there are a
lot of PCs connected to the Switch.

DSCP

The Differentiated Services Code Point (DSCP) is a six bit field that is contained within an
IP (TCP or UDP) header. Six bits allows the DSCP field to take any value in the range 0 -
63 inclusive. When QoS Mode is set to DSCP, the DSCP Configuration table appears
which allows a priority to be set for each of the DSCP values.
You can use the Prioritize Traffic drop-down list to quickly set the values in the DSCP
Configuration table. Select All Low Priority to set all values to low priority, All Normal
Priority to set all values to normal priority, All Medium Priority to set all values to
medium priority, or select All High Priority to set all values to high priority. Use Custom
if you want to set each value individually.
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