Организация локальной сети с одновременным подключением к двум интернет-провайдерам при помощи маршрутизатора MikroTik

#Main interface name
:global MainIf ether1_onlime
#Reserve interface name
:global RsrvIf ether2_qwerty

:local PingCount 3
#Ping Google DNS
:local PingTarget1 8.8.8.8
#Ping Yandex DNS
:local PingTarget2 77.88.8.8

#Check main internet connection
:local MainIfInetOk false;
:local PingResult1 [/ping $PingTarget1 count=$PingCount interface=$MainIf]
:local PingResult2 [/ping $PingTarget2 count=$PingCount interface=$MainIf]
:set MainIfInetOk (($PingResult1 + $PingResult2) >= ($PingCount))

#Check reserved internet connection
:local RsrvIfInetOk false;
:local PingResult1 [/ping $PingTarget1 count=$PingCount interface=$RsrvIf]
:local PingResult2 [/ping $PingTarget2 count=$PingCount interface=$RsrvIf]
:set RsrvIfInetOk (($PingResult1 + $PingResult2) >= ($PingCount))

:put «MainIfInetOk=$MainIfInetOk»
:put «RsrvIfInetOk=$RsrvIfInetOk»

if (!$MainIfInetOk) do={
/log error «Main internet connection error»
}

if (!$RsrvIfInetOk) do={
/log error «Reserve internet connection error»
}

:local MainGWDistance [/ip route get [find comment=«Main»] distance]
:local RsrvGWDistance [/ip route get [find comment=«Reserve»] distance]
:put «MainGWDistance=$MainGWDistance»
:put «RsrvGWDistance=$RsrvGWDistance»

#SetUp gateways
if ($MainIfInetOk && ($MainGWDistance >= $RsrvGWDistance)) do={
/ip route set [find comment=«Main»] distance=2
/ip route set [find comment=«Reserve»] distance=3
}

if (!$MainIfInetOk && $RsrvIfInetOk && ($MainGWDistance <= $RsrvGWDistance)) do={
/ip route set [find comment=«Main»] distance=3
/ip route set [find comment=«Reserve»] distance=2
}