Failover & Failback Configuration Guide
Overview
Failover and Failback settings are used to control how the router switches between:
Primary Uplink (Wired)
Secondary Uplink (Cellular / Backup)
These settings define:
How quickly the router switches to backup when primary fails (Failover)
How quickly the router switches back to primary when it becomes stable again (Failback)
Where to Configure
Navigate to:
Monitor→ Network Device → device page →Edit Primary Uplink → Advance Options
You will see:
Failover Check
Failback Check
1️⃣ Failover Check
Definition
Failover Check determines how many consecutive health check failures must occur before the router switches from:
Primary (Wired) ➝ Secondary (Cellular)
How It Works
The router continuously monitors the primary link by checking internet reachability.
If the link fails consecutively based on the configured Failover value:
The router switches to backup uplink.
Example
If:
Failover Check = 3
This means:
Router detects 3 consecutive failures
It switches to cellular backup
Approximate switching time: 25–65 seconds (as shown in UI)
Recommended Settings
Environment | Suggested Failover |
Stable enterprise ISP | 3 |
Critical uptime sites | 2 |
Unstable ISP | 4–5 |
⚠️ Lower value = Faster switching
⚠️ Higher value = More stable detection (less false failover)
2️⃣ Failback Check
Definition
Failback Check determines how many consecutive successful health checks must occur before switching back to Primary uplink.
Secondary (Cellular) ➝ Primary (Wired)
How It Works
When primary link comes back:
Router does not immediately switch back
It waits until stability is confirmed
After configured successful checks → it returns to wired
Example
If:
Failback Check = 5
This means:
Router waits for 5 successful health checks
Then switches back to primary
Approximate time: 46–51 seconds (as shown in UI)
Recommended Settings
Environment | Suggested Failback |
Normal sites | 5 |
Critical uptime | 6–8 |
Unstable ISP | 8–10 |
⚠️ Higher failback value prevents flapping between uplinks.
Failover vs Failback – Simple Explanation
Feature | What It Does |
Failover | Switches to backup when primary fails |
Failback | Switches back to primary when it stabilizes |
Important Behaviour
Router must have Advance Options enabled
uplinks must be configured properly
Health check is based on internet reachability
Failover time depends on:
Failover count
Heartbeat interval
Network latency
Best Practice Configuration
For most production sites:
Failover Check: 3
Failback Check: 5
This provides:
Fast failover
Stable failback
Minimal uplink flapping