Advantech EKI-9512-C0IDW10E, User Manual

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EKI-9500 Series User Manual 292
4.7.2.4 Drop Precedence
Use the CoS Interface Queue Drop Precedence Configuration page to configure the
queue drop precedence on a per-queue, per-interface basis. When an interface is
configured with taildrop queue management, all packets on a queue are safe until
congestion occurs. If congestion occurs, any additional packets queued are dropped.
Weighted Random Early Detection (WRED) drops packets selectively based their
drop precedence level.
To access this page, click QoS > Class of Service > Drop Precedence .
Figure 4.319 QoS > Class of Service > Drop Precedence
The following table describes the items in the previous figure.
Minimum Bandwidth The minimum guaranteed bandwidth allocated to the selected queue
on the interface. Setting this value higher than its corresponding Maxi-
mum Bandwidth automatically increases the maximum to the same
value. A zero value (0) means no guaranteed minimum. The sum of
individual Minimum Bandwidth values for all queues in the selected
interface cannot exceed defined maximum 100.
Scheduler Type The type of queue processing. Defining this value on a per-queue
basis allows you to create the desired service characteristics for differ-
ent types of traffic. The options are as follows:

Weighted: Weighted round robin associates a weight to each
queue.

Strict: Strict priority services traffic with the highest priority on a
queue first.
Queue Manage-
ment Type The type of queue depth management techniques used for all queues
on this interface. The options are as follows:

Taildrop: All packets on a queue are safe until congestion occurs.
At this point, any additional packets queued are dropped.

WRED: Weighted Random Early Detection (WRED) drops pack-
ets selectively based their drop precedence level.
Refresh Click Refresh to update the screen.
Edit Click Edit to edit the selected entries.
Restore Default Click Restore Default to restore all CoS queue settings on the select
interface to the default values.
Item Description
Item Description
Interface The interface on which to configure the queue drop precedence set-
tings. To configure the same settings on all interfaces, select the
Global menu option.
Queue ID The CoS queue on which to configure the drop precedence settings.
The higher the queue value, the higher its priority is for sending traffic.
Drop Precedence
Level The four drop precedence levels.