Quick Reference Guide

368 | Quality of Service (QoS) Commands
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Mode
Global Config
Usage
After you change the buffers, you should execute this command before rebooting the switch to verify
that the buffer allocations meet the hardware requirements.
Command
History
Related
Commands
buffer dedicated (1G and stacking ports)
This command sets 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.
Syntax
[no] buffer dedicated {interface unit/slot/port | system-uplink unit} Queue-0_buffer
Queue-1_buffer Queue-2_buffer Queue-3_buffer Queue-4_buffer Queue-5_buffer
Queue-6_buffer
To return buffers to their default values, use the no buffer dedicated interface unit/slot/port or no
buffer dedicated system-uplink unit command syntax, depending on the target port.
Parameters
Version 2.5.1 Introduced
buffer dedicated (1G and
stacking ports)
Set buffer sizes per port and per queue for 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 the optional 10Gb ports 49 and 50
on the S50 and the 10Gb ports on the S25P.
buffer dynamic (1G and stack
ports)
Set dynamic buffer sizes per port for ports 1 – 48 and the stack port on the
S50, and ports 1 – 52 and the stack port on the S50V
show buffer unit Display configured and actual static buffer allocation and packet allocation
values per queue for the
selected port in an S50, S50V, or S25P.
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 (1 – 48) (Use buffer dedicated interface (10G
ports) for ports 49 and 50.)
• 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.
Queue-0_buffer,
Queue-1_buffer...
...Queue-6_buffer
For each of the seven queues, in sequence, enter a number indicating its
desired buffer size, in 1KB increments (for example, 100 for 100KB).
Each queue can be assigned from 0KB to any portion of the remaining total
memory. Queue 7 is unavailable for buffer carving, inheriting any of the
total buffer size not allocated.
The total buffer size varies by platform:
• S50: 988KB
• S50V: 2013KB
Memory measurement is the total combined dedicated and dynamic memory
per 12-port group.