To check the HA Status of Paloalto firewall via CLI

show high-availability state



Group 1:
  Mode: Active-Passive
  Local Information:
    State: active
    Pseudo State: active
    Device ID: 0
    HA1 IP: 10.10.10.1
    HA1 link status: up
    HA2 IP: 172.16.1.1
    HA2 link status: up
    Priority: 100
    Preemptive: no
    HA1 Control Link Monitor: up
    HA2 Data Link Monitor: up
    Sync status: complete
  Peer Information:
    State: passive
    Pseudo State: passive
    Device ID: 1
    HA1 IP: 10.10.10.2
    HA1 link status: up
    HA2 IP: 172.16.1.2
    HA2 link status: up
    Priority: 90
    Preemptive: no
    Sync status: complete

This is the main CLI command to view detailed HA status.