Qos-Policy-Buffer - Dell S4810 Reference Manual

resume-offset
threshold-
value
shared-
threshold-
weight
size
Default The default size of the ingress buffer is 45 KB. The default buffer limit at which the
port sends the pause to peer and recommences the sending of packets to the peer
is 10 KB. The default threshold weight of the shared buffer space is 10.
Command DCB-BUFFER-THRESHOLD mode
Modes
Command
Version 9.3(0.0)
History
Usage For each priority, you can specify the shared buffer threshold limit, the ingress
Information 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.
You can use theprioritycommand to set up both the administrative and peer-
related PFC priorities. For example, you can configure the intended buffer
configuration for all eight priorities. If you configure the number of lossless queues
as 4 and if the administrator-configured priorities configured within the DCB input
policy is applied, then the configuration for those priorities are pre-designed.
However, if the peer-provided priorities are applied, although a DCB input policy is
present, the peer-provided priorities become effective for buffer configuration.
This method of configuration provides an easy and flexible technique to
accommodate both administratively-configured and peer-configured priorities.
Example
Dell(conf-dcb-buffer-thr)#priority 0 buffer-size 52 pause-
threshold 16 resume-offset 10 shared-threshold-weight 7

qos-policy-buffer

Create a QoS policy buffer and enter the configuration mode to configure the no-drop queues, ingress
buffer size, buffer limit for pausing, and buffer offset limit for resuming. This utility is supported on the
S4810
Syntax
qos-policy-buffer queue queue-num pause no-drop queue buffer-
size size pause-threshold threshold-value resume-offset
threshold-value shared-threshold-weight size
580
Buffer offset limit for resuming in KB
Buffer offset limit at which the port resumes the peer in KB.
Enter a number in the range of 1 to 7787. The default is 10
KB.
Buffer shared threshold weight
Weightage of the priorities on the shared buffer size in the
system. Enter a number in the range of 0 to 9. The default
shared threshold weight is 10.
Introduced on the S4810, S4820T, and S6000 platforms.
Data Center Bridging (DCB)