Applies To:Show Versions
- 11.5.10, 11.5.9, 11.5.8, 11.5.7, 11.5.6, 11.5.5, 11.5.4, 11.5.3, 11.5.2, 11.5.1
Overview: Configuring a BIG-IP GTM redundant system
You can configure BIG-IP Global Traffic Manager (GTM) in a redundant system configuration, which is a set of two BIG-IP GTM systems: one operating as the active unit, the other operating as the standby unit. If the active unit goes offline, the standby unit immediately assumes responsibility for managing DNS traffic. The new active unit remains active until another event occurs that would cause the unit to go offline, or you manually reset the status of each unit.
Perform the following tasks to configure a BIG-IP GTM redundant system configuration.
Before you begin, ensure that the Setup utility was run on both devices. During the Setup process, you create VLANs internal and external and the associated floating and non-floating IP addresses, and VLAN HA and the associated non-floating self IP address. You also configure the devices to be in an active-standby redundant system configuration.
Defining an NTP server
- On the Main tab, click The NTP Device configuration screen opens. .
In the Time Server Lookup List area, in the Address field, type the
IP address of the NTP that you want to add. Then, click Add.
Note: If you did not disable DHCP before the first boot of the BIG-IP system, and if the DHCP server provides the information about your NTP server, then this field is automatically populated.
- Click Update.
Creating listeners to identify DNS traffic
- On the Main tab, click The Listeners List screen opens. .
- Click Create. The Listeners properties screen opens.
- In the Name field, type a unique name for the listener.
- For the Destination setting, in the Address field, type an IPv4 address on which GTM listens for network traffic.
- In the Service area, from the Protocol list, select UDP.
- Click Finished.
Defining a data center
- On the Main tab, click The Data Center List screen opens. .
- Click Create. The New Data Center screen opens.
In the Name field, type a name to identify the data
Important: The data center name is limited to 63 characters.
- In the Location field, type the geographic location of the data center.
- In the Contact field, type the name of either the administrator or the department that manages the data center.
- From the State list, select Enabled.
- Click Finished.
Defining a server to represent each BIG-IP system
- On the Main tab, click The Server List screen opens. .
- Click Create. The New Server screen opens.
In the Name field, type a name for the server.
Important: Server names are limited to 63 characters.
- From the Product list, select BIG-IP System (Redundant). The server type determines the metrics that the system can collect from the server.
In the Address List area, add the IP address of the server.
Important: You must use a self IP address for a BIG-IP system; you cannot use the management IP address.
In the Address List area, add the IP addresses of the back up system using the
Peer Address List setting.
- Type an external (public) IP address in the Address field, and then click Add.
- Type an internal (private) IP address in the Translation field, and then click Add.
- From the Data Center list, select the data center where the server resides.
- From the Virtual Server Discovery list, select Disabled.
- Click Create. The Server List screen opens displaying the new server in the list.
Enabling global traffic configuration synchronization
- On the Main tab, click The General configuration screen opens. .
- Select the Synchronize check box.
- In the Group Name field, type the name of the synchronization group.
In the Time Tolerance field, type the maximum number of seconds
allowed between the time settings on this system and the other systems in the synchronization
The lower the value, the more often this system makes a log entry indicating that there is
a difference.Tip: If you are using NTP, leave this setting at the default value of 10. In the event that NTP fails, the system uses the time_tolerance variable to maintain synchronization.
- Select the Synchronize DNS Zone Files check box.
- Click Update.
Running the gtm_add script
- On the new BIG-IP GTM system, log in to the command-line interface.
- Type gtm_add, and press Enter.
- Press the y key to start the gtm_add script.
- Type the IP address of the existing GTM system, and press Enter.