Users Guide

Version Description
9.3(0.0) Introduced on the S6000 platform.
Usage Information Congure the maximum buer available for PFC trac. You can choose to increase or decrease the buer
size that is currently allocated in the system by default. However, if you modify the PFC buer size to be
lower than the previously congured PFC buer size, the system determines whether this reduction in size
is valid without disrupting the existing conguration. In such a scenario, you must disable and re-enable DCB.
For example, if you modify the total buer size to be 4000 KB from the previous size of 5000 KB, an error
message is displayed that this reduction cannot be performed owing to existing system conguration
because of queues that are being currently processed.
The lossless queue limit per port is validated based on the dcb pfc-queues command. PFC queue
conguration identies the maximum number of queues a port can support. Although the queue limit per
port is a baseline when dynamic buering is enabled, the limit per port for queues depends on the availability
of the buer.
Example
Dell(conf)#dcb pfc-total-buffer-size 5000
Dell(conf)#dcb pfc-total-buffer-size 4000 %ERROR: Total pfc buffer size
configured cannot accommodate existing buffer requirement in the system.
show running-cong dcb-buer-threshold
Displays the DCB buer threshold details in the running conguration.
Syntax
show running—config buffer-threshold
Command Modes
EXEC
EXEC Privilege
Command History
Version Description
9.7(0.0) Introduced on the S6000-ON.
9.3(0.0) Introduced on the S6000 platform.
Usage Information The following table describes the output elds displayed for the show running-config dcb-buffer-threshold command:
Field Description
Prole name Name of the DCB buer threshold prole
Priority The priority of the queue for which the buer space settings
apply
buer-size Ingress buer size
pause-threshold-value Buer limit at which the port sends the pause to peer in KB.
resume-threshold-value Buer oset limit at which the port resumes the peer in KB.
Example
Dell#show run buffer-threshold
!
dcb-buffer-threshold test1
pfc priority 0 buffer-size 40
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Data Center Bridging (DCB)