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Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
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:
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
switch(config)#
Enters configuration mode.
Step 2
switch(config)# no rate-mode
bandwidth-fairness module 1
Disables bandwidth fairness for a module.
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.
Command Purpose
Step 1
switch# config t
switch(config)#
Enters configuration mode.
Step 2
switch(config)# interface fc 1/1
switch(config-if)#
Selects the interface and enters interface
configuration submode.