Chapter 16 Quality of Service (QoS)
P-870HN-5xb User’s Guide
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The following table describes the labels in this screen.
16.8 Technical Reference
The following section contains additional technical information about the Device
features described in this chapter.
IEEE 802.1Q Tag
The IEEE 802.1Q standard defines an explicit VLAN tag in the MAC header to
identify the VLAN membership of a frame across bridges. A VLAN tag includes the
12-bit VLAN ID and 3-bit user priority. The VLAN ID associates a frame with a
specific VLAN and provides the information that devices need to process the frame
across the network.
IEEE 802.1p specifies the user priority field and defines up to eight separate traffic
types. The following table describes the traffic types defined in the IEEE 802.1d
standard (which incorporates the 802.1p).
Table 74 QoS > Monitor
LABEL DESCRIPTION
Refresh Interval Enter how often you want the Device to update this screen. Select No
Refresh to stop refreshing statistics.
Interface Monitor
No. This is the index number of the entry.
Name This shows the name of the WAN interface on the Device.
Pass This shows how many packets forwarded to this interface are
transmitted successfully.
Drop This shows how many packets forwarded to this interface are
dropped.
Queue Monitor
No. This is the index number of the entry.
Name This shows the name of the queue.
Pass This shows how many packets assigned to this queue are transmitted
successfully.
Drop This shows how many packets assigned to this queue are dropped.
Table 75 IEEE 802.1p Priority Level and Traffic Type
PRIORITY
LEVEL
TRAFFIC TYPE
Level 7 Typically used for network control traffic such as router configuration
messages.
Level 6 Typically used for voice traffic that is especially sensitive to jitter (jitter is the
variations in delay).
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