Failover Configuration In BDCOM Switch Or OLT

Failover Configuration In BDCOM Switch Or OLT, This configuration sets up Active-Backup Link Protection on a BDCOM switch, ensuring automatic failover between two uplinks. Let me break it down for you:

1. Backup Link Group Configuration

• backup-link-group 1 → Defines a backup link group (ID: 1).
• preemption-mode forced → Forces the primary link to become active again when it is restored.
• delay 3 → Introduces a 3-second delay before switching back to the primary link.

2. Configure the Primary Uplink (Active)

• GigaEthernet0/3 → Acts as the primary uplink.
• switchport mode trunk → Enables VLAN traffic forwarding.
• backup-link-group 1 active → Assigns this interface as the active link in Backup Link Group 1.

3. Configure the Backup Uplink (Passive)

• GigaEthernet0/4 → Serves as the backup uplink.
• switchport mode trunk → Enables VLAN traffic forwarding.
• backup-link-group 1 backup → Assigns this interface as the backup link in Backup Link Group 1.

4. How This Works

• Under normal conditions, GigaEthernet0/3 is active.
• If GigaEthernet0/3 fails, GigaEthernet0/4 automatically takes over.
• When GigaEthernet0/3 recovers, it automatically becomes active again after a 3-second delay due to preemption-mode forced delay 3.

5. Verify the Configuration

Run these commands to check the status:

6. Save Configuration

Ensure the settings are saved permanently:

Interface configuration

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