Addendum

dot1p Value in the
Incoming Frame
Description heading
6 3
7 3
pfc priority
Configure the CoS traffic to be stopped for the specified delay.
Syntax
pfc priority priority-range
To delete the pfc priority configuration, use the no pfc priority command.
Parameters
priority-range Enter the 802.1p values of the frames to be paused. Separate
the priority values with a comma; specify a priority range
with a dash; for example, pfc priority 1,3,5-7. The range is
from 0 to 7.
Defaults none
Command
Modes
DCB INPUT POLICY
Command
History
Version 9.3.0.0 Introduced on the M I/O Aggregator and MXL 10/40GbE
Switch with the FC Flex IO module.
Usage
Information
You can enable any number of 802.1p priorities for PFC. Queues to which PFC
priority traffic is mapped are lossless by default. Traffic may be interrupted due to
an interface flap (going down and coming up) when you reconfigure the lossless
queues for no-drop priorities in a PFC input policy and reapply the policy to an
interface.
The maximum number of lossless queues supported on the switch is two.
A PFC peer must support the configured priority traffic (as DCBX detects) to apply
PFC.
Related
Commands
dcb-input — creates a DCB input policy.
show dcb
Displays the data center bridging status, the number of PFC-enabled ports, and the number of PFC-
enabled queues.
Syntax
show dcb [stack-unit unit-number]
Parameters
unit number Enter the DCB unit number. The range is from 0 to 5.
Data Center Bridging (DCB) for FC Flex IO Modules
523