Users Guide

Conguration steps:
1 Create PFC dot1p trac classes.
2 Congure ingress buers for PFC trac.
3 Apply a service policy and enable PFC.
4 (Optional) Congure the PFC shared buer for lossless trac.
Create PFC dot1p trac classes
1 Create a network-qos class map to classify PFC trac classes in CONFIGURATION mode, from 1 to 7. Specify the trac classes
using the match qos-group command. QoS-groups map 1:1 to trac classes 1 to 7; for example, qos-group 1 corresponds to
trac class 1. Enter a single value, a hyphen-separated range, or multiple
qos-group values separated by commas in CLASS-MAP
mode.
class—map type network-qos class—map-name
match qos-group {1-7}
exit
2 (Optional) Repeat Step 1 to congure additional PFC trac-class class-maps.
Congure pause and ingress buers for PFC trac
For the default ingress queue settings and the default dot1p priority-queue mapping, see PFC conguration notes.
1 Create a network-qos policy map in CONFIGURATION mode.
policy-map type network-qos policy—map-name
2 Associate the policy-map with a network-qos class map in POLICY-MAP mode.
class class-map-name
3 Congure default values for ingress buers used for the network-qos class maps in POLICY-CLASS-MAP mode.
pause
(Optional) Change the default values for the ingress-buer size reserved for the network-qos class-map trac and the thresholds
used to send XOFF and XON pause frames in kilobytes.
pause [buffer-size kilobytes {pause-threshold kilobytes | resume-threshold kilobytes}]
4 Enable the PFC pause function for dot1p trac in POLICY-CLASS-MAP mode. The dot1p values must be the same as the qos-
group trac class numbers in the class map in Step 2. Enter a single dot1p value, from 1 to 7, a hyphen-separated range, or multiple
dot1p values separated by commas.
pfc-cos dot1p-priority
5 (Optional) Set the static and dynamic thresholds used to limit the shared buers allocated to PFC trac-class queues. Congure a
static, xed queue-limit (in kilobytes) or a dynamic threshold (weight 1-10; default 9) based on the available PFC shared buers.
queue-limit thresh-mode {static kilobytes | dynamic weight}
6 (Optional) Repeat Steps 2–4 to congure PFC on additional trac classes.
Apply service policy and enable PFC
1 Apply the PFC service policy on an ingress interface or interface range in INTERFACE mode.
interface ethernet node/slot/port:[subport]
service-policy input type network-qos policy—map-name
interface range ethernet node/slot/port:[subport]-node/slot/port[:subport]
service-policy input type network-qos policy—map-name
2 Enable PFC without DCBX for FCoE and iSCSI trac in INTERFACE mode.
priority-flow-control mode on
Congure PFC
Converged data center services
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