queue 0 to
queue 7
Specify the queue number to which the QoS policy buffer
parameters apply
pause
Pause frames to be sent at the specified buffer limit levels
and pause packet settings
no-drop
The packets for this queue must not be dropped
value
Enter a number in the range of 0 to 7 to denote the priority
to be allocated to the dynamic buffer control mechanism
buffer-size
Ingress buffer size
size
Size of the ingress buffer in KB. Enter a number in the range
from 0 to 7787. The default is 45KB.
pause-
threshold
Buffer limit for pause frames to be sent
threshold-
value
Buffer limit at which the port sends the pause to peer in KB.
Enter a number in the range from 0 to 7787. The default is
10KB.
resume-offset
Buffer offset limit for resuming in KB
threshold-
value
Buffer offset limit at which the port resumes the peer in KB.
Enter a number in the range from 1 to 7787. The default is
10KB.
shared-
threshold-
weight
Buffer shared threshold weight
size
Weightage of the priorities on the shared buffer size in the
system. Enter a number in the range from 0 to 9. The default
shared threshold weight is 10.
Default
The default size of the ingress buffer is 45KB. The default buffer limit at which the
port sends the pause to peer and recommences the sending of packets to the peer
is 10KB. The default threshold weight of the shared buffer space is 10.
Command
Modes
DCB-BUFFER-THRESHOLD mode
Command
History
Version
Description
9.7(0.0)
Introduced on the Z9500.
Usage
Information
You must apply this buffer policy at the interface level for the attributes to be
applicable with the DCB input policy.
For each QoS policy buffer, you can specify the shared buffer threshold limit, the
ingress buffer size, buffer limit for pausing the acceptance of packets, and the
buffer offset limit for resuming the acceptance of received packets. When PFC
detects congestion on a queue for a specified priority, it sends a pause frame for
the 802.1p priority traffic to the transmitting device.
638
Data Center Bridging (DCB)
