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Ethernet Port Commands
Default
default
Parameters
size-in-kbytes — The size parameter is an integer expression of the number of kilobytes reserved for the
queue. If a value of 10KBytes is desired, enter the value 10. A value of 0 specifies that no reserved
buffers are required by the queue (a minimal reserved size can still be applied for scheduling purposes).
Values
high-prio-only
Syntax
high-prio-only percent
no high-prio-only
Context
config>port>ethernet>access>egr>qgrp>qover>q
config>port>ethernet>access>ing>qgrp>qover>q
config>port>ethernet>network>egr>qover>q
Description
The high-prio-only command specifies the percentage of buffer space for the queue, used exclusively by
high priority packets. The specified value overrides the default value for the context.
The priority of a packet can only be set in the SAP ingress QoS policy and is only applicable on the ingress
queues for a SAP. The high-prio-only parameter is used to override the default value derived from the net-
work-queue command.
The no form of this command restores the default high priority reserved size.
Parameters
percent — The percentage reserved for high priority traffic on the queue. If a value of 10KBytes is desired,
enter the value 10.
Values
mbs
Syntax
mbs size-in-kbytes
no mbs
Context
config>port>ethernet>access>egr>qgrp>qover>q
config>port>ethernet>access>ing>qgrp>qover>q
config>port>ethernet>network>egr>qover>q
Description
The Maximum Burst Size (MBS) command specifies the default maximum buffer size for the template
queue. The value is given in kilobytes.
The MBS value is used by a queue to determine whether it has exhausted all of its buffers while enqueuing
packets. Once the queue has exceeded the amount of buffers allowed by MBS, all packets are discarded until
packets have been drained from the queue.
The sap-ingress context for mbs provides a mechanism for overriding the default maximum size for the
queue.
The sum of the MBS for all queues on an ingress access port can oversubscribe the total amount of buffering
available. When congestion occurs and buffers become scarce, access to buffers is controlled by the RED
Page 212
0 — 131072 or default
0 — 100, default
7710 SR OS Interface Configuration Guide
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