Users Guide

Example
Dell# show qos dcb-map dcbmap2
State :Complete
PfcMode:ON
--------------------
PG:0 TSA:ETS BW:50 PFC:OFF
Priorities:0 1 2 4 5 6 7
PG:1 TSA:ETS BW:50 PFC:ON
Priorities:3
dcb pfc-shared-buer-size
Congure the maximum amount of shared buer size for PFC packets in kilobytes.
Syntax
dcb pfc-shared—buffer—size KB
Parameters
KB Enter a number in the range of 0 to 7787.
Default The default is 832KB.
Command Modes CONFIGURATION mode
Command History
Version Description
9.8(0.0) Introduced on the S4048-ON.
9.7(0.0) Introduced on the S6000-ON and Z9500.
9.6(0.0) Introduced on the S5000.
9.3(0.0) Introduced on the S4810, S4820T, and S6000 platforms.
Usage Information Congure the maximum shared buer available for PFC trac. You can choose to increase or decrease the
shared buer that is allocated in the system by default. Congure the shared buer size less than the total
PFC buer size. If the buer size and DCB buer threshold settings are applied on one or more ports, a
validation is performed to determine whether following condition is satised: If the shared buer size is more
than the total PFC buer size value, the conguration is not saved and a system logging message is
generated as follows:
Shared-pfc-buer-size <= (Total-pfc-buer-size — Σpfc priority <> buer-size on each port, priority).
Dell(conf)#dcb pfc-shared-buffer-size 2000 %ERROR: pfc shared buffer size
configured cannot accommodate existing buffer requirement in the system.
Enter a smaller value for the shared buer size or increase the total buer size appropriately by using the
dcb pfc-total- buffer-size command.
Example
Dell(conf)#dcb pfc-shared-buffer-size 5000
530
Data Center Bridging (DCB)