Add ADVPN to dynamic BGP on loopback example

Spoke

To configure the spoke:

1. 1. Define a health check for spoke to hub. Example settings provided for SLA metrics.

   config system sdwan        
       config health-check
           edit "HUB_HC"
               set server “172.16.255.251”
               set update-cascade-interface disable
               set update-static-route disable
               set sla-fail-log-period 10
               set sla-pass-log-period 10
               set members 3 4 5 6
               config sla
                   edit 1
                       set latency-threshold 255
                       set jitter-threshold 55
                       set packetloss-threshold 1
                   next
               end
           next
       next
   end

2. Enable ADVPN 2.0 on the HUB SD-WAN Zones and assign the HUB_HC health-check.

   config system sdwan        
       config zone
           edit "HUB1"
               set advpn-select enable
               set advpn-health-check "HUB_HC"
           next
           edit "HUB2"
               set advpn-select enable
               set advpn-health-check "HUB_HC"
           next
       end
   end