Install Guide

(KB) (KB)
-----------------------------------------------------------------------------------------
------------
1 0.0 4727 2656 1040 1040 576
1 0.1 4727 2656 1040 1040 576
1 0.2 4727 2656 1040 1040 576
1 0.3 4727 2656 1040 1040 576
Z9100R145U29#show dcb
DCB Status: Enabled, PFC Queue Count: 2
stack-unit Total Buffer PFC Total Buffer PFC Shared Buffer PFC Available
Buffer
PP (KB) (KB) (KB) (KB)
-----------------------------------------------------------------------------------------
-------------------------------------------------
1 0.0 4096 3664 208 3456
1 0.1 4096 3664 208 3456
1 0.2 4096 3664 208 3456
1 0.3 4096 3664 208 3456
DellEMC#
DellEMC#show dcb
DCB Status: Enabled, PFC Queue Count: 2
Total Buffer: Total available buffer excluding the buffer pre-allocated
for guaranteed services like global headroom, queue's min
guaranteed buffer and CPU queues.
PFC Total Buffer: Maximum buffer available for lossless queues.
PFC Shared Buffer: Buffer used by ingress priority groups for shared usage.
PFC Headroom Buffer: Buffer used by ingress priority group for shared headroom usage.
PFC Available Buffer: Current buffer available for new lossless queues to be
Provisioned.
stack-unit Total Buffer PFC Total Buffer PFC Shared Buffer PFC Headroom Buffer PFC
Available Buffer
PP (KB) (KB) (KB)
(KB) (KB)
-----------------------------------------------------------------------------------------
------------
1 0.0 3399 2656 1040 1040 576
1 0.1 3399 2656 1040 1040 576
1 0.2 3399 2656 1040 1040 576
1 0.3 3399 2656 1040 1040 576
DellEMC#
The following table shows the PFC buffer required for one loss less queue on various supported interface speeds:
DCB Buffer value after PFC configuration:
When PFC is configured on a particular port, two XPEs corresponding to the ingress pipe to which the port belongs is updated
with the buffer values. If the port is on the ingress pipe 0 or 3, both the XPE A are updated. Where as, if the port is on ingress
pipe 1 or 2, then both the XPE B are updated.
The following example shows DCB buffer values after one PFC lossless queue configured on a port that belongs to ingress pipe
0 [10G speed]:
DellEMC#show dcb
DCB Status: Enabled, PFC Queue Count: 2
Total Buffer: Total available buffer excluding the buffer pre-allocated
for guaranteed services like global headroom, queue's min
guaranteed buffer and CPU queues.
Data Center Bridging (DCB)
247