Dell MXL 10GbE Reference Manual page 431

threshold-
value
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 thepriority command to set up both the administrative and peer-
related PFC priorities. For example, you can configure the intended buffer
configuration for all 8 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
Data Center Bridging (DCB)
Buffer limit at which the port sends the pause to peer in KB.
Enter a number in the range of 0 to 7787. The default is 10
KB.
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 MXL platform.
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