Enabling Bandwidth Fairness; Disabling Bandwidth Fairness; Upgrade Or Downgrade Scenario - HP Cisco MDS 9020 - Fabric Switch Configuration Manual

Configuring Generation 2 Module Interface Shared Resources
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
This feature is only supported onthe 48-port and 24-port 4-Gbps Fibre Channel switching modules, as
Note
well as the 18-port Fibre Channel/4-port GigabitEthernet Multiservice module.

Enabling Bandwidth Fairness

To enable bandwidth fairness on a switching module, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# rate-mode
bandwidth-fairness module 1
Step 3
switch(config)# exit

Disabling Bandwidth Fairness

If you disable bandwidth fairness, up to a 20 percent increase in internal bandwidth allocation is possible
Note
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.
To disable bandwidth fairness on a switching module, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# no rate-mode
bandwidth-fairness module 1
Step 3
switch(config)# exit

Upgrade or Downgrade Scenario

When you are upgrading from a release earlier than Cisco SAN-OS Release 3.1(2), all modules operate
with bandwidth fairness disabled until the next module reload. After the upgrade, any new module that
is inserted has bandwidth fairness enabled.
When you are downgrading to a release earlier than Cisco SAN-OS Release 3.1(2), all modules keep
operating in the same bandwidth fairness configuration prior to the downgrade. After the downgrade,
any new module that is inserted has bandwidth fairness disabled.
Cisco MDS 9000 Family CLI Configuration Guide
14-32
Chapter 14 Configuring Generation 2 Switches and Modules
Purpose
Enters configuration mode.
Enables bandwidth fairness for a module.
You must enter this command separately for
Note
each module for which you want to enable
bandwidth fairness. You must reload the
module for the command to take effect.
Exits configuration mode.
Purpose
Enters configuration mode.
Disables bandwidth fairness for a module.
You must enter this command separately for
Note
each module for which you want to disable
bandwidth fairness. You must reload the
module for the command to take effect.
Exits configuration mode.
OL-16184-01, Cisco MDS SAN-OS Release 3.x