Load Balancing &; Fail Over RouterOS

Load Balancing & Fail Over

• Load Balancing is a technique to distribute the workload across two or more network links in order to maximize throughput, minimize response time, and avoid overload.
• Fail Over protection system is to maintain if the primary link is interrupted, it will automatically enable the backup path (link the second, third, etc.) Type Load Balancing.

• Per Packet Load Balancing

- In MikroTik using a feature called Interface Bonding

- The division of the load based on packet-packet (packet 1 via a gateway, packet 2 through gateway b)

• Per Connection Load Balancing

- Using features in IP Mikrotik Bernama NTH mangle
- The division of the load based on connections (1 connection through a gateway, via the gateway connection to 2 b)

• Per address-pair connection Load Balancing

- Features ECMP and PCC (Peer Connection Classified)
- Pebagian traffic based on the IP address of the connection and the origin and destination of the connection
• Custom Load Balancing (Policy Routing -> route mark)

Equal Cost Multi Path (ECMP)

• ECMP allows the router has more than one gateway to one destination network.
• Each gateway will be selected based on ECMP algorithm Round Roubin of combination SRC / DST address
• The same gateway can be written repeatedly.

Script For 2 Line ISP :

/ip firewall address-list

add address=192.168.0.0/16 list=LOCAL-IP comment="LoadBalancing"

add address=172.16.0.0/12 list=LOCAL-IP comment="LoadBalancing"

add address=10.0.0.0/8 list=LOCAL-IP comment="LoadBalancing"

/ip firewall nat

add chain=srcnat out-interface="192.168.1.2/24" action=masquerade comment="LoadBalancing"

add chain=srcnat out-interface="" action=masquerade comment="LoadBalancing"

/ip route

add check-gateway=ping distance=1 gateway="192.168.2.2/24" routing-mark="to-192.168.1.2/24" comment="LoadBalancing"

add check-gateway=ping distance=1 gateway="" routing-mark="to-" comment="LoadBalancing"

add check-gateway=ping distance=1 gateway="192.168.2.2/24" comment="LoadBalancing"

add check-gateway=ping distance=2 gateway="" comment="LoadBalancing"

/ip firewall mangle

add action=mark-connection chain=input in-interface="192.168.1.2/24" new-connection-mark="cm-192.168.1.2/24" passthrough=yes comment="LoadBalancing"

add action=mark-connection chain=input in-interface="" new-connection-mark="cm-" passthrough=yes comment="LoadBalancing"

add action=mark-routing chain=output connection-mark="cm-192.168.1.2/24" new-routing-mark="to-192.168.1.2/24" passthrough=yes comment="LoadBalancing"

add action=mark-routing chain=output connection-mark="cm-" new-routing-mark="to-" passthrough=yes comment="LoadBalancing"

add action=mark-connection chain=prerouting dst-address-list=!LOCAL-IP dst-address-type=!local new-connection-mark="cm-192.168.1.2/24" passthrough=yes per-connection-classifier=both-addresses-and-ports:2/0 src-address-list=LOCAL-IP comment="LoadBalancing"

add action=mark-connection chain=prerouting dst-address-list=!LOCAL-IP dst-address-type=!local new-connection-mark="cm-" passthrough=yes per-connection-classifier=both-addresses-and-ports:2/1 src-address-list=LOCAL-IP comment="LoadBalancing"

add action=mark-routing chain=prerouting connection-mark="cm-192.168.1.2/24" dst-address-list=!LOCAL-IP new-routing-mark="to-192.168.1.2/24" passthrough=yes src-address-list=LOCAL-IP comment="LoadBalancing"

add action=mark-routing chain=prerouting connection-mark="cm-" dst-address-list=!LOCAL-IP new-routing-mark="to-" passthrough=yes src-address-list=LOCAL-IP comment="LoadBalancing"