Load Balancing (PCC)

PCC Load Balancing

Per-Connection Classifier (PCC) — механизм распределения соединений между несколькими WAN-каналами. PCC хеширует параметры соединения (src/dst address, src/dst port) и распределяет трафик по группам.

Dual-WAN с PCC

# ISP1: ether1 (DHCP), ISP2: ether2 (DHCP)

# Маркировка соединений через PCC (50/50)
/ip/firewall/mangle
add chain=prerouting in-interface=bridge-lan     connection-state=new dst-address-type=!local     per-connection-classifier=both-addresses-and-ports:2/0     action=mark-connection new-connection-mark=ISP1-conn     passthrough=yes
add chain=prerouting in-interface=bridge-lan     connection-state=new dst-address-type=!local     per-connection-classifier=both-addresses-and-ports:2/1     action=mark-connection new-connection-mark=ISP2-conn     passthrough=yes

# Маркировка маршрутов
add chain=prerouting connection-mark=ISP1-conn     in-interface=bridge-lan action=mark-routing     new-routing-mark=to-ISP1
add chain=prerouting connection-mark=ISP2-conn     in-interface=bridge-lan action=mark-routing     new-routing-mark=to-ISP2

# NAT для обоих ISP
/ip/firewall/nat
add chain=srcnat out-interface=ether1 action=masquerade
add chain=srcnat out-interface=ether2 action=masquerade

# Маршруты с routing-mark
/ip/route
add dst-address=0.0.0.0/0 gateway=ISP1_GW     routing-table=to-ISP1 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=ISP2_GW     routing-table=to-ISP2 check-gateway=ping

# Default route для трафика самого роутера
add dst-address=0.0.0.0/0 gateway=ISP1_GW distance=1     check-gateway=ping
add dst-address=0.0.0.0/0 gateway=ISP2_GW distance=2     check-gateway=pingRouterOS CLI

Failover при падении канала