Quick Reference Guide

Quality of Service (QoS) Commands | 371
To return buffers to their default values, use the no buffer dynamic interface unit/slot/port or no
buffer dynamic system-uplink unit command syntax, depending on the target port.
Parameters
Defaults
S50: 286KB for 1Gb ports, 431KB for stack ports
S50V: 257KB for 1Gb ports, 385KB for stack ports and 10G ports
S25P: There is no switch fabric in this switch, so, therefore, there is no system-downlink.
Mode
Global Config
Command
History
Usage
Information
Dynamic buffer limits can be oversubscribed; oversubscription ratio: eight times for 1Gb ports and 13
times for stack ports.
Related
Commands
interface unit/slot/port Enter the keyword interface followed by the port that you want to configure.
The possible ports vary by platform:
• S50: The 1Gb ports (ports 1 – 48) (Dynamic buffering is not supported for
the optional 10Gb ports 49 and 50. The dynamic buffer is sufficiently
oversubscribed by default.)
• S50V: 1 – 52
system-uplink unit Enter the keyword system-uplink followed by the stack member number
containing the stack port that you want to configure.
Note: There is no system-uplink in the S25P.
buffer
Enter the desired buffer size, in 1KB increments (for example, 100 for 100KB).
The available buffer size varies by platform:
• S50: 1024KB
• S50V: 2013KB
Version 2.5.1 Introduced
buffer check Verify that the configured buffer allocations meet the hardware requirements.
buffer dedicated (1G and
stacking ports)
Set buffer sizes per port and per queue for the ASICs controlling ports
1– 48 and the stack port on the S50, and ports 1 – 52 and the stack port on the
S50V
buffer dedicated interface
(10G ports)
Set buffer sizes per port and per queue for ASICs controlling the optional 10Gb
ports 49 and 50 on the S50 and the 10Gb ports on the S25P.
show buffer unit Display configured values for dedicated buffers, dynamic buffers, and packet
limits for
each port in an S50, S50V, or S25P, as well as the actual settings from
the switch hardware.
show buffer allocation
interface
Display configured and actual static buffer allocation and packet allocation values
per queue for the
selected port in an S50, S50V, or S25P.