Chapter 7 Quality of Service (QoS)

The following table describes the labels in this screen.

Table 20 Network Setting > QoS > Monitor

LABEL

DESCRIPTION

Monitor

 

 

 

Refresh

Select how often you want the LTE Device to update this screen. Select No Refresh to stop

Interval

refreshing statistics.

 

 

Status

 

 

 

#

This is the index number of the entry.

 

 

Name

This shows the name of the WAN interface on the LTE Device.

 

 

Pass Rate (bps)

This shows how much traffic (bps) forwarded to this interface are transmitted successfully.

 

 

Queue Monitor

 

 

 

#

This is the index number of the entry.

 

 

Name

This shows the name of the queue.

 

 

Pass Rate (bps)

This shows how much traffic (bps) assigned to this queue are transmitted successfully.

 

 

Drop Rate (bps)

This shows how much traffic (bps) assigned to this queue are dropped.

 

 

7.6 QoS Technical Reference

This section provides some technical background information about the topics covered in this chapter.

7.6.1 DiffServ

QoS is used to prioritize source-to-destination traffic flows. All packets in the flow are given the same priority. You can use CoS (class of service) to give different priorities to different packet types.

DiffServ (Differentiated Services) is a class of service (CoS) model that marks packets so that they receive specific per-hop treatment at DiffServ-compliant network devices along the route based on the application types and traffic flow. Packets are marked with DiffServ Code Points (DSCPs) indicating the level of service desired. This allows the intermediary DiffServ-compliant network devices to handle the packets 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.

DSCP and Per-Hop Behavior

DiffServ defines a new DS (Differentiated Services) field to replace the Type of Service (TOS) field in the IP header. The DS field contains a 2-bit unused field and a 6-bit DSCP field which can define up to 64 service levels. The following figure illustrates the DS field.

DSCP is backward compatible with the three precedence bits in the ToS octet so that non-DiffServ compliant, ToS-enabled network device will not conflict with the DSCP mapping.

DSCP (6 bits)

Unused (2 bits)

 

 

 

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LTE6100 User’s Guide