Netgear GS752TXS - Stackable Smart Gigabit Ethernet Switch 관리자 가이드

From the Interface Trust Mode drop down list, select the trust mode for ingress traffic on the 

selected interfaces.

. Do not trust any CoS packet marking at ingress.

. The eight priority tags that are specified in IEEE 802.1p are p0 to p7. The 

QoS setting lets you map each of the eight priority levels to one of seven internal 
hardware priority queues.

. The six most significant bits of the DiffServ field are called the Differentiated 

Services Code Point (DSCP) bits.

In the Interface Shaping Rate field, specify the maximum bandwidth allowed. 

This is typically used to shape the outbound transmission rate in increments of 64 kbps in 
this range of 16–16384. This value is controlled independently of any per-queue 
maximum bandwidth configuration. It is effectively a second-level shaping mechanism. 
The default value is 0. The value 0 means the maximum is unlimited.

The expected shaping at egress interface is calculated as:

frameSize*shaping/(frameSize+IFG), where IFG (Inter frame gap) is 20 bytes, frameSize 
is configured frame size of the traffic and shaping is configured traffic shaping in the 
Interface Shaping Rate field.

For example, when the frame size is 64 bytes and the interface shaping rate is 64, the 
expected shaping will be approximately 48kbps.

Setting the value to 0 resets the configured traffic-shape rate.

Click Apply. 

Interface Queue Configuration

Use the Interface Queue Configuration screen to define what a particular queue does by 
configuring switch egress queues. User-configurable parameters control the amount of 
bandwidth used by the queue, the queue depth during times of congestion, and the 
scheduling of packet transmission from the set of all queues on a port. Each port has its own 
CoS queue-related configuration.

The configuration process is simplified by allowing each CoS queue parameter to be 
configured globally or per-port. A global configuration change is automatically applied to all 
ports in the system.

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Select QoS 

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 > Advanced 

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