The Global Traffic Director gives clients the ability to geographically respond to queries differently based on region. It is useful is you have multiple different servers located around the world and you want to direct your traffic to the closest server. For example, you can have your ‘www’ record for your domain point to a web server at 220.127.116.11 in Asia and a different webserver at 18.104.22.168 in the United States on the west coast. Querying clients in the Asia region are sent to 22.214.171.124 while US querying clients are sent to 126.96.36.199. We also have two additional servers set up at 188.8.131.52 in the United States on the east coast and 184.108.40.206 as the default IP. This is what we will configure below for example-1.com. We will also configure DNS Failover service on the Asia and US West Coast A records so in the event that 220.127.116.11 in Asia is offline, all traffic will be sent to the United States West Coast (the next closest geographical region) and in the event 18.104.22.168 in the United States West Coast is offline, all traffic will be sent to the US East Coast (the next closest geographical region).
Step 1: To start, enable and configure GTD for the domain.
Step 2: Now we will set up a contact list for notification of the failover event. Select the “Config” menu
Step 3: Click on “Contact Lists”
Step 4: Click on the plus sign (+) to add a new contact list
Step 5: Give the contact list an identifiable name and enter the email addresses you would like included in the list, one per line. Groups are discussed in a tutorial here, however, if you are the only user for your account your contact list should be part of the default group. Otherwise, it should be part of whatever group is set up to have management permissions for the domain. Click “Submit”.
Step 6: Now we will set up DNS Failover with the defined GTD records.
Step 7: Select the DNS Menu, then Select Managed DNS.
Step 8: Select a domain from the either the “Recently Updated Domains” box, or start typing the domain name in the textbox on the “Select Domain” tab.
Step 9: Select the “Records” tab if it is not already selected. For the purpose of this tutorial, we have configured example.com with 4 GTD A records, one for each region.
Step 10: Under the “SM / FO” column next to the first A record, click “off” to configure DNS Failover.
Step 11: If you require assistance with the different options for configuration of DNS Failover, please view the DNS Failover Tutorial. We will add a new failover configuration for the ASIA_PAC www.example.com record (with a primary IP of a web server at 22.214.171.124 in Asia), If the Asia server is offline, we will send traffic to the next closest geographical location which is our web server on the US West Coast at 126.96.36.199. You can take this one step further and if both Asia and the US West Coast are offline, you can send traffic to the US East Coast at 188.8.131.52.
Step 12: Click Ok
Step 13: You can use this same idea to create redundancy for any GTD region defined record.