ZyXEL Communications MES-2110 manual Tag Priority Table, IP Dscp Priority Table, 161

Chapter 21 QoS

21.4 The Tag Priority Table

Click Configuration > QoS Menu > Tag Priority to open the following screen.

Figure 77 Configuration > QoS Menu > Tag Priority

The following table describes the labels in this screen.

Table 62 Configuration > QoS Menu > Tag Priority

LABEL	DESCRIPTION
Number	This is the IEEE 802.1p priority level.
Priority	Use this to assign the tag priority level to one of the MES-2110’s
	queue level (Low, Normal, Preferred or High).
Undo	Click this to load your last saved settings.
Apply	Click Apply to save your changes to the ZyXEL Device’s run-time
	memory. The ZyXEL Device loses these changes if it is turned off
	or loses power, so use the Save Settings link in the navigation
	panel to save your changes to the non-volatile memory.

21.5 The IP DSCP Priority Table

DiffServ is a class of service (CoS) model that marks frames so that they receive specific per-hop treatment at DiffServ-compliant network devices along the route based on the application types and traffic flow. Frames are marked with DiffServ Code Points (DSCPs) indicating the level of service desired. This allows the intermediary DiffServ-compliant network devices to handle the frames differently depending on the code points without the need to negotiate paths or remember state information for every flow. In addition, applications do not have to request a particular service or give advanced notice of where the traffic is going.

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