2 Active Link and 1 Backup Link

Hi All,
I have three ISP links. I want to configure 2 active links and 1 backup link (active when 2 primary links are down).
I can configure a10 for 2 ISP links but the backup link doesn’t have any idea.
Could you please share a sample configuration for my problem? Thank you.

Within the NHLD service group configurations, configure the 2 active link members with a higher priority than the 1 backup link member. With this configuration, the backup link member should only be used if both active link members are in a down state. Example:

slb service-group outbound-tcp-links tcp
  member Pri-1 0
    priority 10
  member Pri-2 0
    priority 10
  member Backup 0
    priority 5
!
slb service-group outbound-udp-links udp
  member Pri-1 0
    priority 10
  member Pri-2 0
    priority 10
  member Backup 0
    priority 5

Hi mdunn,
Thank you very much. It’s work.
Panutorn I.