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In today’s enterprise networks, downtime is not an option. Whether supporting branch offices, data centers, retail chains, or mission-critical operations, network resiliency must be automatic, seamless, and intelligent.

7GFUSE rackmountable units are designed with built-in High Availability (HA) architecture using VRRP (Virtual Router Redundancy Protocol) and advanced Heartbeat monitoring, ensuring continuous connectivity without manual intervention.

What is High Availability?

High Availability (HA) is a network design approach where two identical 7GFUSE units operate as:

  • Primary (Active) Device
  • Secondary (Standby) Device

If the primary unit fails, the secondary unit automatically takes over within seconds — maintaining uninterrupted service and preserving session continuity wherever possible.

HA Architecture Overview

In a typical deployment:

  • Multiple WAN links (Fiber, ADSL, 5G, MPLS, etc.) connect to both 7G Fuse units.
  • LAN/Core switches connect to both devices.
  • A dedicated HA Sync & Heartbeat link interconnects the two units.
  • A Virtual IP Address (VIP) is presented to the network using VRRP.

The network always communicates with the Virtual IP — not the physical device IP.

Split-Brain Protection

Split-brain occurs when both devices believe they are Primary.
7G Fuse prevents this using:

  • Dedicated heartbeat interface
  • VRRP state validation
  • Interface tracking
  • Optional quorum logic
  • Link-state verification

Only one device can hold the Virtual IP at any time.

Failover Scenarios
Scenario 1 – Hardware Failure

If the Primary device loses power:

  • Heartbeat signal drops
  • VRRP advertisements stop
  • Secondary takes over VIP
  • Traffic reroutes automatically
  • No manual intervention required

Failover Time: Typically 1–3 seconds (configurable)

Scenario 2 – WAN Link Failure Only

If one WAN link fails:

  • No full failover occurs
  • Bonding engine removes failed link
  • Traffic distributes over remaining links

This ensures:

  • Zero gateway switch
  • No LAN disruption
  • Continuous session stability

Benefits of 7G Fuse HA Architecture

  • Zero Single Point of Failure
  • Sub-second detection with heartbeat
  • Seamless Virtual IP failover
  • WAN-aware failover intelligence
  • Multi-WAN bonding state protection
  • Enterprise-grade rackmount deployment
    Supports Fiber, DSL, 5G, MPLS, and Satellite uplinks

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