Взято отсюда: https://aacable.wordpress.com/2011/07/27/mikrotik-dual-wan-load-balancing-using-pcc-method-complete-script-by-zaib/
Подробные пояснения: http://wiki.mikrotik.com/wiki/Manual:PCC и http://wiki.mikrotik.com/wiki/How_PCC_works_%28beginner%29
Еще полезная статейка: https://habr.com/post/313342/
/ip address add address=192.168.0.1/24 network=192.168.0.0 broadcast=192.168.0.255 interface=Local add address=192.168.1.2/24 network=192.168.1.0 broadcast=192.168.1.255 interface=WAN1 add address=192.168.2.2/24 network=192.168.2.0 broadcast=192.168.2.255 interface=WAN2 /ip firewall mangle add chain=input in-interface=WAN1 action=mark-connection new-connection-mark=WAN1_conn add chain=input in-interface=WAN2 action=mark-connection new-connection-mark=WAN2_conn add chain=output connection-mark=WAN1_conn action=mark-routing new-routing-mark=to_WAN1 add chain=output connection-mark=WAN2_conn action=mark-routing new-routing-mark=to_WAN2 add chain=prerouting dst-address=192.168.1.0/24 action=accept in-interface=Local add chain=prerouting dst-address=192.168.2.0/24 action=accept in-interface=Local add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:2/0 action=mark-connection new-connection-mark=WAN1_conn passthrough=yes add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:2/1 action=mark-connection new-connection-mark=WAN2_conn passthrough=yes add chain=prerouting connection-mark=WAN1_conn in-interface=Local action=mark-routing new-routing-mark=to_WAN1 add chain=prerouting connection-mark=WAN2_conn in-interface=Local action=mark-routing new-routing-mark=to_WAN2 /ip route add dst-address=0.0.0.0/0 gateway=192.168.1.1 routing-mark=to_WAN1 check-gateway=ping add dst-address=0.0.0.0/0 gateway=192.168.2.1 routing-mark=to_WAN2 check-gateway=ping add dst-address=0.0.0.0/0 gateway=192.168.1.1 distance=1 check-gateway=ping add dst-address=0.0.0.0/0 gateway=192.168.2.1 distance=2 check-gateway=ping /ip firewall nat add chain=srcnat out-interface=WAN1 action=masquerade add chain=srcnat out-interface=WAN2 action=masquerade
Если каналы неравны (как у меня), то нужно изменить
add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:2/0 action=mark-connection new-connection-mark=WAN1_conn passthrough=yes add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:2/1 action=mark-connection new-connection-mark=WAN2_conn passthrough=yes
на
add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:3/0 action=mark-connection new-connection-mark=WAN1_conn passthrough=yes add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:3/1 action=mark-connection new-connection-mark=WAN2_conn passthrough=yes add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:3/2 action=mark-connection new-connection-mark=WAN2_conn passthrough=yes
Спасибо за подсказку maxim.naidenov:
;;; Winbox chain=prerouting action=mark-routing new-routing-mark=to_WAN1 passthrough=no protocol=tcp dst-address-type=!local in-interface=bridge-local dst-port=8291 connection-mark=no-mark ;;; Wargaming, RU9 chain=prerouting action=mark-routing new-routing-mark=to_WAN2 passthrough=no dst-address=xxx.xxx.xxx.0/24 dst-address-type=!local in-interface=bridge-local connection-mark=no-mark
При эксплуатации IPSEC и балансировке каналов выяснился интересный факт: при установке IPSEC не получается обменяться всеми ключами. IPSEC вроде бы как и поднимается, но работать не работает. Если посмотреть IP → IPsec → Installed SAs - можно увидеть что счетчик «Current Bytes» для одного из ключей равен 0, т.е. обмен ключами все-таки не прошел. Для правильной работы необходимо добавить еще два правила:
> /ip firewall mangle > add chain=output action=mark-routing new-routing-mark=ISP1_conn passthrough=no connection-mark=ISP1_conn > add chain=output action=mark-routing new-routing-mark=ISP2_conn passthrough=no connection-mark=ISP2_conn
При этом в таблице маршрутизации должны быть маршруты с соответствующими Routing Mark
Было (неверно):
> add chain=output action=mark-connection new-connection-mark=ISP1_conn passthrough=no out-interface=WAN1 > add chain=output action=mark-connection new-connection-mark=ISP2_conn passthrough=no out-interface=WAN2