Users Guide

Reason Description
• Incompatible TC TSA.
Configuring the Dynamic Buffer Method
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-Dell(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-Dell(conf)#dcb pfc-shared-buffer-size 4000
S6000-109-Dell(conf)#dcb pfc-total-buffer-size 5000
3 Configure the number of PFC queues.
CONFIGURATION mode
Dell(conf)#dcb enable pfc-queues 4
The number of ports supported based on lossless queues configured will depend on the buffer.
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
Dell(conf)#dcb-buffer-threshold test
5
DCB-BUFFER-THRESHOLD mode
Dell(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
Dell(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)
Dell(conf-if-te-0/0)#dcb-policy buffer-threshold test
8 Create a QoS policy buffer and enter the QoS Policy Buffer Configuration mode to configure the no-drop queues, ingress buffer size,
buffer limit for pausing, and buffer offset limit for resuming.
CONFIGURATION mode
Dell(conf)# qos-policy-buffer test
Dell (conf-qos-policy-buffer)#queue 0 pause no-drop buffer-size 128000 pause-threshold 103360
resume-threshold 83520
Data Center Bridging (DCB)
67