Configure load balancing 2 ISP in MikroTik Router

Load balancing there are two ISP that allow you to distrubute network traffic across two internet service providers (ISPs)

1. Load Balancing: Traffic is distributed between the two ISPs based on configured policies, ensuring efficient use of both connections.
2. Failover: If one ISP connection fails and one more  IPS is   up 

1. Connect to iSP 1
2. Connect to iSP 2
3. Configure LAN IP Address
4. Configure Route
5. Configure NAT 
6. Configure Mangle (mark connection)
7. Configure Mangle (mark routing)
8. Confgure Route Again
9. Testing Clients

• Open winbox login to your router via IP address or Mac address
• Rename Interface: Go to Interface ehter1 to ehter1-ISP1, ether1 to ether2-ISP2
• Rename Interface: Go to Interface ehter3 to ehter2-LAN

1. Connect to ISP1

• Set IP Address: Go to IP > Address > "+" button > Set IP address of ISP1 > Ok

2. Connect to ISP2

• Set IP Address: Go to IP > Address > "+" button > Set IP address of ISP2 > Ok

3. Configure LAN IP Address

• Set IP address LAN: Go to IP > Address > "+" button > Set IP address of your LAN > Ok

4. Configure Routes

• Add Route: Go to IP > Routes > "+" button > Fill out your imforation of your ISP > Ok 

5. Configure NAT for ISP1 and ISP2

• Add NAT: Go to IP > Firewall > NAT > "+" button > 
• Chain: select srcnat
• Out Interface: select ehter1-ISP1

Action Tab

•  Action: select masquerade
• Click Ok

• Add NAT: Go to IP > Firewall > NAT > "+" button > 
• Chain: select srcnat
• Out Interface: select ehter1-ISP2

Action Tab

•  Action: select masquerade
• Click Ok

6. Configure Mangle ISP1 

• Add Mangle: Go to IP > Firewall > Mangle> "+" button > 
• Chain: select input
• In Interface: select ether1-ISP1

Action tab

• Action: select mark connection
• New Connection Mark: Add new name

6.1 Configure Mangle ISP2

• Add Mangle: Go to IP > Firewall > Mangle> "+" button > 
• Chain: select input
• In Interface: select ether1-ISP2

Action tab

• Action: select mark connection
• New Connection Mark: Add new name

7. Configure Mangle (mark routing) ISP1

• Add Mangle: Go to IP > Firewall > Mangle> "+" button > 
• Chain: select output
• Connection Mark: select ISP1-CONNECTION

Action tab

• Action: select mark routing
• New Connection Mark: Add new name

7.1 Configure Mangle (mark routing) ISP2

• Add Mangle: Go to IP > Firewall > Mangle> "+" button > 
• Chain: select output
• Connection Mark: select ISP2-CONNECTION

Action tab

• Action: select mark routing
• New Connection Mark: Add new name

8. Configure Route to ISP1

• Add Routes: Go to  IP > Routes > "+" button > 
• Dst Address: 0.0.0.0 
• Gateway: 10.10.10.1 (gateway of ISP1)
• Check Gateway: ping
• Routing Mark: TO-ISP1

8. Configure Route to ISP2

• Add Routes: Go to  IP > Routes > "+" button > 
• Dst Address: 0.0.0.0 
• Gateway: 20.20.20.1 (gateway of ISP1)
• Check Gateway: ping
• Routing Mark: TO-ISP2

9. Testing client

• ISP1 lost internet it still working via ISP2