Nokia 7705 - Page 319

Quality of Service Guide Service Egress and Ingress QoS Policies
Edition: 01 3HE 11014 AAAC TQZZA 319
cbs
Syntax cbs {size-in-kbytes | default}
no cbs
Context config>qos>sap-ingress>queue
config>qos>sap-egress>queue
Description This command overrides the default Committed Buffer Space (CBS) reserved for buffers of
a specified queue. The value is configured in kilobytes.
The value in kilobytes is converted automatically to the number of buffers. The conversion
calculation uses a non-configurable buffer size of 2304 bytes or 512 bytes, depending on the
type of adapter card. See Table 4 for a list of adapter cards and their associated buffers. The
calculation is:
Number of buffers = Configured CBS value in bytes / Buffer size in bytes
At the egress of an N > 1 Apipe, the CBS value in a SAP egress QoS policy that is assigned
to a SAP aggregation group causes n times that value of buffers to be committed, where n is
the number of SAPs in the SAP aggregation group. See the show pools command for
information about how to view buffer pools for SAPs that are members of a SAP aggregation
group. See the 7705 SAR Services Guide for information about how to configure SAP
aggregation groups.
The no form of this command returns the CBS size to the default value.
Default “default”
(8 kbytes for adapter cards and platforms with 512 byte buffer size)
(18 kbytes for adapter cards and platforms with 2304 byte buffer size).
Parameters size-in-kbytes — this parameter is an integer expression of the number of kilobytes
reserved for the queue. 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 0 to 131072
default — returns the CBS size to the default value
high-prio-only
Syntax high-prio-only percent
no high-prio-only
Context config>qos>sap-ingress>queue
config>qos>sap-egress>queue
Description This command configures the percentage of buffer space for the queue, used exclusively by
high-priority packets. The specified value overrides the default value for the context.