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C H A P T E R 4 Scenario 1
31
Part 2 –
Changing to
Flash
Response
Mode
Balancing
Key Concepts:
•
Flash Response Mode
• Associating 7190s with a site
Procedure
Now that the 7190 is configured and functioning properly it is time to
modify the configuration to use Flash Response Mode balancing
instead of Weighted Round Robin.
Step 1. Associate 7190s with a site.
Flash Response Mode works by sending DNS responses back to the
client from a source that is as close (network wise) as possible to the
address it is returning. Only the 7190s are capable of sending Flash
responses.
config dns isvgroups westcoastsite
flash-src 10.1.1.1
config dns isvgroups eastcoastsite
flash-src 10.1.2.1
Step 2. Change the host balancing method to Flash
Response Mode.
config dns zones geo.mstd-ex.com
hostnames www
method flash
Step 3. Commit the configuration changes.
Now that the changes are completed, save a snapshot and commit the
configuration. Note that now that a secondary 7190 is online these
configuration changes are instantly propagated to the secondary 7190
(eastcoastsite) whenever the commit all command is executed.
save first-cfg
commit all