Cisco Systems DSC9148D8G48PK9 Disabling Bandwidth Fairness, Taking Interfaces Out of Service

Chapter 3 Configuring Fibre Channel Interfaces

Configuring Fibre Channel Interfaces

Disabling Bandwidth Fairness

Restrictions

•If you disable bandwidth fairness, up to a 20 percent increase in internal bandwidth allocation is possible for each port group; however, bandwidth fairness is not guaranteed when there is a mix of shared and full-rate ports in the same port group.

Detailed Steps

To disable bandwidth fairness on a switching module, follow these steps:

	Command	Purpose
Step 1
	switch# config t	Enters configuration mode.
	switch(config)#
Step 2
	switch(config)# no rate-mode	Disables bandwidth fairness for a module.
	bandwidth-fairness module 1	Note You must enter this command separately for
		each module for which you want to disable
		bandwidth fairness. You must reload the
		module for the command to take effect.
Step 3
	switch(config)# exit	Exits configuration mode.

Taking Interfaces Out of Service

You can take interfaces out of service on Generation 2 and Generation 3 switching modules. When an interface is out of service, all the shared resources for the interface are released as well as the configuration associated with those resources.

Prerequisites

•The interface must be disabled using a shutdown command before it can be taken out of service.

Restrictions

•The interface cannot be a member of a PortChannel.

•Taking interfaces out of service releases all the shared resources to ensure that they are available to other interfaces. This causes the configuration in the shared resources to revert to default when the interface is brought back into service. Also, an interface cannot come back into service unless the default shared resources for the port are available. The operation to free up shared resources from another port is disruptive.

Detailed Steps

To take an interface out of service, follow these steps:

	Command		Purpose
Step 1
	switch# config t		Enters configuration mode.
	switch(config)#
Step 2
	switch(config)# interface fc 1/1		Selects the interface and enters interface
	switch(config-if)#		configuration submode.
		Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x				3-41