CLI Guide

Default The default size of the ingress buer is 45 KB. The default buer 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 buer
space is 10.
Command Modes DCB-BUFFER-THRESHOLD mode
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.3(0.0) Introduced on the MXL platform.
Usage Information For each priority, you can specify the shared buer threshold limit, the ingress buer size, buer limit for pausing
the acceptance of packets, and the buer oset limit for resuming the acceptance of received packets. When PFC
detects congestion on a queue for a specied priority, it sends a pause frame for the 802.1p priority trac to the
transmitting device.
You can use thepriority command to set up both the administrative and peer-related PFC priorities. For
example, you can congure the intended buer conguration for all 8 priorities. If you congure the number of
lossless queues as 4 and if the administrator-congured priorities congured within the DCB input policy is applied,
then the conguration 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 eective for buer conguration. This
method of conguration provides an easy and exible technique to accommodate both administratively-congured
and peer-congured priorities.
Example
Dell (conf-dcb-buffer-thr)#priority 0 buffer-size 52 pause-threshold 16 resume-
offset 10 shared-threshold-weight 7
priority-group bandwidth pfc
Congure the ETS bandwidth allocation and PFC mode used to manage port trac in an 802.1p priority group.
Syntax
priority-group group-num {bandwidth percentage| strict-priority} pfc {on | off}
Parameters
priority-group
group-num
Enter the keyword priority-group followed by the number of an 802.1p priority
group. Use the priority-pgid command to create the priority groups in a DCB map.
bandwidth
percentage
Enter the keyword bandwidth followed by a bandwidth percentage allocated to the
priority group. The range of valid values is 1 to 100. The sum of all allocated bandwidth
percentages in priority groups in a DCB map must be 100%.
strict-priority Congure the priority-group trac to be handled with strict priority scheduling. Strict-
priority trac is serviced rst, before bandwidth allocated to other priority groups is made
available.
pfc {on | o} Congure whether priority-based ow control is enabled (on) or disabled (o) for port
trac in the priority group.
Defaults None
Command Modes DCB MAP
Supported Modes Programmable-Mux (PMUX)
Full–Switch
410 Data Center Bridging (DCB)