Bandwidth Control - D-Link xStack Reference Manual

xStack® DES-3200 Series Layer 2 Ethernet Managed Switch WEB UI Reference Guide
For strict priority-based scheduling, any packets residing in the higher priority queues are transmitted first. Multiple
strict priority queues empty based on their priority tags. Only when these queues are empty, are packets of lower
priority transmitted.
For weighted round robin queuing, the number of packets sent from each priority queue depends upon the assigned
weight. For a configuration of four QoS queues, A~D with their respective weight value: 4~1, the packets are sent in
the following sequence: A1, B1, C1, D1, A2, B2, C2, A3, B3, A4.
For weighted round robin queuing, if each QoS queue has the same weight value, then each QoS queue has an equal
opportunity to send packets just like round robin queuing.
The Switch has four priority queues (and eight Classes of Service) for each port.

Bandwidth Control

The bandwidth control settings are used to place a ceiling on the transmitting and receiving data rates for any selected
port.
To view this window, click QoS > Bandwidth Control:
The following parameters can be set or are displayed:
Parameter
From Port/To Port
Type
No Limit
Rate
(64–1024000)
Click Apply to set the bandwidth control for the selected ports. Results of configured Bandwidth Settings will be
displayed in the Bandwidth Control Table on the lower half of the window.
Figure 4 - 2. Bandwidth Control window
Description
A consecutive group of ports may be configured starting with the selected port.
This drop-down menu allows you to select between Rx (receive), Tx (transmit), and Both. This
setting will determine whether the bandwidth ceiling is applied to receiving, transmitting, or both
receiving and transmitting packets.
Use the drop-down menu to specify the selected port has limited or unlimited bandwidth.
This field allows you to enter the data rate, in Kbits per second, that will be the limit for the
selected port. The value must be a multiple of 62.5 up to 1024000.
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