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You can use set up both the administrative and peer-related PFC priorities. For
example, you can configure the intended buffer configuration for all 8 priorities. If
you configure the number of lossless queues as 4 and if the administrator-
configured priorities configured within the DCB input policy is applied, then the
configuration for those priorities are pre-designed. However, if the peer-provided
priorities are applied, although a DCB input policy is present, the peer-provided
priorities become effective for buffer configuration. This method of configuration
provides an easy and flexible technique to accommodate both administratively-
configured and peer-configured priorities.
Example
S4810-YU-MR-Dell(conf)# qos-policy-buffer test
S4810-YU-MR-Dell (conf-qos-policy-buffer)#queue 0 pause no-drop
buffer-size 128000 pause-threshold 103360 resume-threshold
83520
S4810-YU-MR-Dell (conf-qos-policy-buffer)# queue 4 pause no-
drop buffer-size 128000 pause-threshold 103360 resume-threshold
83520
dcb-policy buffer-threshold (Interface Configuration)
Assign the DCB policy to the DCB buffer threshold profile on interfaces. This setting takes precedence
over the global buffer-threshold setting.
Syntax
dcb-policy buffer-threshold linecard <0-2/all> port-set <0-3/
all> backplane all <dcb-policy-name>
Parameters
buffer-
threshold
Configure the profile name for the DCB buffer threshold
Default None
Command
Modes
INTERFACE mode
Command
History
Version Description
9.7(0.0) Introduced on the Z9500.
Usage
Information
You can configure up to a maximum of four lossless (PFC) queues. By configuring
four lossless queues, you can configure four different priorities and assign a
particular priority to each application that your network is used to process. For
example, you can assign a higher priority for time-sensitive applications and a
lower priority for other services, such as file transfers. You can configure the
amount of buffer space to be allocated for each priority and the pause or resume
thresholds for the buffer. This method of configuration enables you to effectively
manage and administer the behavior of lossless queues.
Data Center Bridging (DCB)
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