Reference Guide

to traffic 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 configure additional PFC traffic-class class-maps.
NOTE: In the S5148F-ON, PFC is not supported on priority 0.
Configure pause and ingress buffers for PFC traffic
See PFC configuration notes for the default ingress queue settings and the default dot1p priority-queue mapping.
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. Configure default values for ingress buffers used for the network-qos class maps in POLICY-CLASS-MAP mode.
pause
(Optional) Change the default values for the ingress-buffer size reserved for the network-qos class-map traffic 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 traffic in POLICY-CLASS-MAP mode. The dot1p values must be the same as the
qos-group (traffic class) numbers in the class map in Step 2. Enter a single dot1p value (1-7), 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 buffers allocated to PFC traffic-class queues.
Configure a static, fixed queue-limit (in kilobytes) or a dynamic threshold (weight 1-10; default 9) based on the available PFC
shared buffers. This option is not available in S5148F-ON.
queue-limit thresh-mode {static kilobytes | dynamic weight}
6. (Optional) Repeat Steps 2–4 to configure PFC on additional traffic 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 traffic in INTERFACE mode.
priority-flow-control mode on
Configure PFC
PFC is enabled on traffic classes with dot1p 3 and 4 traffic. The two traffic classes require different ingress queue processing. In
the network-qos pp1 policy map, class cc1 uses customized PFC buffer size and pause frame settings; class cc2 uses the
default settings.
OS10(config)# system qos
OS10(config-sys-qos)# trust-map dot1p default
708
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