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HA Concepts
Updated on
Jul 22, 2025
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Updated on
Jul 22, 2025
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HA Concepts
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HA Concepts
Table of Contents
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End-of-Life (EoL)
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HA Overview
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HA Modes
HA Concepts
The following topics provide conceptual information about how HA works on a Palo Alto Networks firewall:
HA Modes
HA Links and Backup Links
Device Priority and Preemption
Failover
LACP and LLDP Pre-Negotiation for Active/Passive HA
Floating IP Address and Virtual MAC Address
ARP Load-Sharing
Route-Based Redundancy
HA Timers
Session Owner
Session Setup
NAT in Active/Active HA Mode
ECMP in Active/Active HA Mode
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HA Overview
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HA Modes
