SonicWall Stateful HA Upgrade for TZ670 Series | High Availability — 02-SSC-5889

Protect uptime on the TZ670 series with SonicWall Stateful HA. This upgrade is built for environments where a firewall outage is not an option, helping maintain service continuity when a primary unit fails or requires maintenance. Stateful high availability goes beyond simple failover. By preserving session state, it reduces the disruption users experience when traffic shifts to a standby system. That matters for VPNs, business applications, remote access, and any workload that depends on uninterrupted firewall enforcement. For infrastructure teams, the value is operational as much as technical. Stateful HA helps reduce the risk of service-impacting maintenance windows, supports tighter resilience targets, and gives procurement a clear justification for paying more than a basic redundancy option. If the TZ670 series anchors a branch, edge, or distributed security deployment, this upgrade helps keep that perimeter online when hardware issues occur. Ideal For Preserve connectivity for branch offices that cannot tolerate firewall downtime Maintain VPN session continuity during appliance failover Support planned maintenance without interrupting perimeter security Increase resilience for edge deployments built on TZ670 series firewalls Why This Product 1 Stateful failover preserves sessions better than basic redundancy 2 TZ670 series compatibility ensures exact platform fit 3 Supports uptime targets for critical perimeter security 4 Reduces disruption during maintenance and hardware failure events