site1_ha-pair

We will now add both BIG-IP clusters to our list of servers. Doing so, allows the BIG-IP DNS to perform monitoring of each cluster to evaluate their capability to process traffic.

In this configuration we will enable both virtual server discovery and link discovery. Virtual server discovery allows BIG-IP DNS to find the list of all virtual servers that are created on each BIG-IP cluster, you will see the benefit of this later. Link discovery allows BIG-IP DNS to automatically add and monitor the upstream link that the BIG-IP LTM cluster is dependent on for Internet access; this can be then used to evaluate failover decision.

../../../../_images/server_create_gtm1-gtm21.png

On gtm1.site1 create a server object according the table below:

Field Value
Name site1_ha-pair
Data Center site1_datacenter
Devices Add: bigip1.site1.example.com : 203.0.113.5
Devices Add: bigip2.site1.example.com : 203.0.113.6
Health Monitors bigip
Virtual Server Discovery Enabled
Link Discovery Enabled

  1. Fill in the Name and Datacenter

    ../../../../_images/site1_click-addserver1.png

  2. Click the “Add” button to define IP addresses

    ../../../../_images/site_ha_pair_bigip1_add1.png

  3. Click “Add” again to define the other BIG-IP in the HA pair.

    ../../../../_images/site1_click-addserver_again.png

  4. Click the “Add” button to define IP addresses

    ../../../../_images/site_ha_pair_bigip2_add.png

  5. Complete the form and associate the “bigip” “Health Monitor”

    ../../../../_images/site1-HA_pair_create1.png

  6. Make sure to enable both “Virtual Server” and “Link” discovery

    ../../../../_images/VS_and_link_auto_discovery.png

TMSH

tmsh create gtm server site1_ha-pair datacenter site1_datacenter devices add { bigip1.site1.example.com { addresses add { 203.0.113.5 { } } } bigip2.site1.example.com { addresses add { 203.0.113.6 { } } } } link-discovery enabled monitor bigip product bigip virtual-server-discovery enabled