Deployment Guide

Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.6(0.0) Supported on the FN 2210S Aggregator.
9.3(0.0) Supported on the M I/O Aggregator.
9.3(0.0) Supported on the MXL 10/40GbE Switch IO Module platform.
Usage Information You can congure up to a maximum of four lossless (PFC) queues. By conguring four lossless queues, you can
congure four dierent 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 le transfers. You can congure the amount of buer space to be allocated for each priority and
the pause or resume thresholds for the buer. This method of conguration enables you to eectively manage and
administer the behavior of lossless queues.
Example
Dell(conf)#dcb pfc-queues 4
dcb enable auto-detect on-next-reload
Enables or disables global DCB on a subsequent reload. Also internally congures PFC buers based on DCB enable or disable. You must
save and reload for the congurations to take eect. You can use the auto-detect keyword to re-enable IOA with the port-wise DCB
auto detect feature.
Syntax
dcb enable [auto-detect | on-next-reload]
To disable global DCB on a subsequent reload, use the no dcb enable on-next-reload command.
Parameters
auto-detect Enter the keywords auto-detect to re-enable the Aggregator with port wise DCB auto
detect feature.
on-next-reload Enter the keywords on-next-reload to apply DCB congurations on subsequent
reload.
Defaults DCB is globally enabled with auto-detect feature.
Command Modes
• CONFIGURATION
Supported Modes All Modes
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.4(0.0) Supported on the FN I/O Aggregator.
8.3.17.3 Added auto-detect parameter on the M I/O Aggregator.
8.3.17.0 Supported on the M I/O Aggregator.
Example (Disable)
Dell#show dcb stack-unit 0 port-set 0
stack-unit 0 port-set 0
DCB Status: Enabled, PFC Queue Count: 4
stack-unit Total Buffer PFC Total Buffer PFC Shared Buffer PFC Available Buffer
PP (KB) (KB) (KB) (KB)
-------------------------------------------------------------------
0 0 3822 1912 832 450
Dell(conf)#
Dell#
Dell#
104 Data Center Bridging (DCB)