Addendum

Total buffer (lossy + lossless)(in KB): 7787--Total buffer space for lossy and
lossless queues
PFC total buffer (in KB): 6526 --Indicates the total buffer (configured or
default)
PFC shared buffer (in KB): 832--Indicates the shared buffer (Configured or
default)
PFC available buffer ( in KB): 5694--Indicates remaining available buffers for
PFC that are free to be allocated
Configuring the Dynamic Buffer Method
Priority-based flow control using dynamic buffer spaces is supported on the S4810, S4820T, S6000, and
MXL platforms.
To configure the dynamic buffer capability, perform the following steps:
1. Enable the DCB application. By default, DCB is enabled and link-level flow control is disabled on all
interfaces.
CONFIGURATION mode
S6000-109-FTOS(conf)#dcb enable
2. Configure the shared PFC buffer size and the total buffer size. A maximum of 4 lossless queues are
supported.
CONFIGURATION mode
S6000-109-FTOS(conf)#dcb pfc-shared-buffer-size 4000
S6000-109-FTOS(conf)#dcb pfc-total-buffer-size 5000
3. Configure the number of PFC queues.
CONFIGURATION mode
FTOS(conf)#dcb enable pfc-queues 4
The number of ports supported based on lossless queues configured will depend on the buffer. The
default number of PFC queues in the system is 2 for S4810 and 1 for S6000 platforms.
For each priority, you can specify the shared buffer threshold limit, the ingress buffer size, buffer limit
for pausing the acceptance of packets, and the buffer offset limit for resuming the acceptance of
received packets.
4. Configure the profile name for the DCB buffer threshold
CONFIGURATION mode
S6000-109-FTOS(conf)#dcb-buffer-threshold test
5.
DCB-BUFFER-THRESHOLD mode
S4810-YU-MR-FTOS(conf-dcb-buffer-thr)# priority 0 buffer-size 52 pause-
threshold 16 resume-offset 10 shared-threshold-weight 7
6. Assign the DCB policy to the DCB buffer threshold profile on stack ports.
CONFIGURATION mode
S4810-YU-MR-FTOS(conf)# dcb-policy buffer-threshold stack-unit all stack-
ports all test
7. Assign the DCB policy to the DCB buffer threshold profile on interfaces. This setting takes
precedence over the default buffer-threshold setting.
INTERFACE mode (conf-if-te)
S4810-YU-MR-FTOS(conf-if-te-0/0)#dcb-policy buffer-threshold test
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Data Center Bridging (DCB)