Auto discover can be helpful, but after initial setup it’s recomended to disable it.
Navigate to DNS ›› GSLB : Servers : Server List ›› Links : site1_ha-pair
Disable Link Auto Discovery
Navigate to DNS ›› GSLB : Servers : Server List ›› Virtual Servers : site1_ha-pair
Disable Virtual Auto Discover and delete unused objects
Note
Repeat the above operations for site2_ha-pair
tmsh modify gtm server site1_ha-pair link-discovery disabled virtual-server-discovery disabled
tmsh modify gtm server site2_ha-pair link-discovery disabled virtual-server-discovery disabled
tmsh modify gtm server site1_ha-pair virtual-servers delete { /Common/isp1_site1_vpn.example.com_tcp_http_virtual /Common/isp1_site1_vpn.example.com_tcp_https_virtual /Common/isp1_site1_www.example.com_tcp_http_virtual }
tmsh modify gtm server site2_ha-pair virtual-servers delete { /Common/isp2_site2_vpn.example.com_tcp_http_virtual /Common/isp2_site2_vpn.example.com_tcp_https_virtual /Common/isp2_site2_www.example.com_tcp_http_virtual }