Load Balancing The Flows; Setting The Tunable Parameters - Cisco MDS 9000 series Configuration Manual

Additional Configurations
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

Load Balancing the Flows

To load balance the flows, perform this task:
Command
Step 1
sjc-sw2# config t
Step 2
sjc-sw2(config)# ioa cluster
tape_vault
Step 3
sjc-sw2(config-ioa-cl)#
load-balancing
sjc-sw2(config-ioa-cl)#
load-balancing enable
sjc-sw2(config-ioa-cl)#
load-balancing
11:22:33:44:55:66:77:88

Setting the Tunable Parameters

To set the the following tunable parameters based on your deployment requirements, perform this task:
Command
sjc-sw2(config-ioa-cl)# tune
round-trip-time ms
sjc-sw2(config-ioa-cl)# tune
lrtp-retx-timeout msec
Caution The following are advanced tunable parameters, and you must consult the Cisco Services and Support
team before tuning these parameters.
To set the the following advanced tunable parameters based on your deployment requirements, perform
this task:
Cisco MDS 9000 Family I/O Accelerator Configuration Guide
4-16
Chapter 4
Purpose
Enters configuration mode.
Enters the cluster configuration mode.
Load balances all the IOA flows. This process is
disruptive and causes the hosts to relogin into targets. The
load-balancing command will take some time to execute
depending on the number of flows. You should not abort
the command in the middle of its execution.
The load-balancing enable command turns on the
load-balancing attribute for the new flows. You may enter
the load-balancing enable command only when you abort
the load-balancing command process.
Load balances specified targets in the IOA flows. This
process is disruptive and causes the hosts to re-login into
targets. The load-balancing command will take some
time to execute depending on the number of flows. You
should not abort the command in the middle of its
execution.
Purpose
Specifies the round-trip time in milliseconds. It is
the time taken by the IOA data packet to traverse
between two sites. The value can vary from 1 to
100 ms. 15 ms is the default.
Specifies the LRTP retransmit timeout in milli-
seconds. It is the time to wait before LRTP starts
retransmitting packets. The value can vary from
500 to 5000 msec. 2500 msec is the default.
For more information, refer to Tuning for
E_D_TOV under "Resiliency Considerations"
section on page 3-8.
OL-20708-01, Cisco MDS NX-OS Release 5.0(1a)
Configuring IOA Using the CLI