Concept Guide

To congure PFC and apply a PFC input policy to an interface, follow these steps.
1 Create a DCB input policy to apply pause or ow control for specied priorities using a congured delay time.
CONFIGURATION mode
dcb-input policy-name
The maximum is 32 alphanumeric characters.
2 Congure the link delay used to pause specied priority trac.
DCB INPUT POLICY mode
pfc link-delay value
One quantum is equal to a 512-bit transmission.
The range (in quanta) is from 712 to 65535.
The default is 45556 quantum in link delay.
3 Congure the CoS trac to be stopped for the specied delay.
DCB INPUT POLICY mode
pfc priority priority-range
Enter the 802.1p values of the frames to be paused.
The range is from 0 to 7.
The default is none.
Maximum number of loss less queues supported on the switch: 2.
Separate priority values with a comma. Specify a priority range with a dash, for example: pfc priority 1,3,5-7.
4 Enable the PFC conguration on the port so that the priorities are included in DCBx negotiation with peer PFC devices.
DCB INPUT POLICY mode
pfc mode on
The default is PFC mode is on.
5 (Optional) Enter a text description of the input policy.
DCB INPUT POLICY mode
description text
The maximum is 32 characters.
6 Exit DCB input policy conguration mode.
DCB INPUT POLICY mode
exit
7 Enter interface conguration mode.
CONFIGURATION mode
interface type slot/port
8 Apply the input policy with the PFC conguration to an ingress interface.
INTERFACE mode
dcb-policy input policy-name
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Data Center Bridging (DCB)