HPE FlexNetwork 5510 HI Series Acl And Qos Configuration Guide

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average queue size is average queue size = (previous average queue size x (1 – 2
–n
)) +
(current queue size x 2
–n
), where n is the exponent.
• Drop probability in percentage—The larger the value is, the greater the drop probability is.
Configuration procedure
A WRED table can be applied to multiple interfaces. For a WRED table already applied to an
interface, you can modify the values of the WRED table, but you cannot remove the WRED table.
To configure and apply a WRED table:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Create a WRED table and
enter its view.
qos wred queue table
table-name N/A
3. (Optional.) Set the WRED
exponent for average
queue size calculation.
queue
queue-id
weighting-constant
exponent
The default setting is 9.
4. (Optional.) Configure drop
parameters.
queue
queue-id [
drop-level
drop-level ]
low-limit
low-limit
high-limit
high-limit
[
discard-probability
discard-prob ]
By default, the low limit is 100,
the high limit is 1000, and the
drop probability is 10%.
5. (Optional.) Enable ECN for
a queue.
queue
queue-id
ecn
By default, ECN is not enabled
on any queue.
6. Enter interface view.
interface
interface-type
interface-number
N/A
7. Apply the WRED table to
the interface.
qos wred apply
[ table-name ]
By default, no WRED table is
applied to an interface, and tail
drop is used on an interface.
Configuration example
Network requirements
Apply a WRED table to interface GigabitEthernet 1/0/2, so that the packets are dropped as follows
when congestion occurs:
• For the interface to preferentially forward higher-priority traffic, set a lower drop probability for a
queue with a greater queue ID. Set different drop parameters for queue 0, queue 3, and queue
7.
• Drop packets according to their colors.
{ In queue 0, set the drop probability to 25%, 50%, and 75% for green, yellow, and red
packets, respectively.
{ In queue 3, set the drop probability to 5%, 10%, and 25% for green, yellow, and red packets,
respectively.
{ In queue 7, set the drop probability to 1%, 5%, and 10% for green, yellow, and red packets,
respectively.
• Enable ECN for queue 7.
Configuration procedure
# Configure a queue-based WRED table, and set different drop parameters for packets with different
drop levels in different queues.

HPE FlexNetwork 5510 HI Series Specifications

General

Brand	HPE
Model	FlexNetwork 5510 HI Series
Category	Switch
Language	English