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Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.3 (0.1) Introduced on S6000, S4810, and S4820T.
Usage
Information
PFC and ETS are enabled by default on the interfaces when DCB is globally enabled (refer to dcb enable).
In some network topology, you may want to disable PFC on an interface and apply link level flow control;
Similarly you may want to disable ETS on an interface and apply QoS bandwidth configurations.
Limitations
● “dcb-map” CLI on interface is mutually exclusive to “no dcb ets enable” and “no dcb pfc
enable”.
● “pfc priority” CLI is mutually exclusive to “no dcb pfc enable” command.
● Deprecated CLI “dcb-policy input” and “no dcb pfc enable” cannot coexist at interface
level.
● Deprecated CLI “dcb-policy output” and “no dcb ets enable” cannot coexist at interface
level.
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 profile-name
Parameters
buffer-threshold Configure the profile name for the DCB buffer threshold
profile-name Enter the name of the profile, which can be a string of up to 32 characters in
length.
Default None
Command Modes INTERFACE mode
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.3(0.0) Introduced on the MXL platform.
Usage
Information
You can configure 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.
Example
Dell(conf-if-te-0/0)#dcb-policy buffer-threshold test
dcb-policy buffer-threshold (Global Configuration)
Assign the dcb buffer threshold policy on the stack ports. To apply the dcb buffer threshold policy on the stack-units, use the
configuration mode. To apply on front-end ports, use the interface mode.
Syntax
dcb-policy buffer-threshold stack-unit all stack-ports all profile-name
364 Data Center Bridging (DCB)