Script to change disconnect Eth interface to connected one

RouterOS Beginner Basics
1

I am trying to locate a script to automatically switch Ethernet1 connection to Ethernet2 when one of two fails and/or loses connection. We have (2) T-1’s connected to the router. I can manually disable one and it automatically picks up the next connected T-1. The issue is I have to manually do this from my desktop on the network. I was told there is a script to do this automatically. Thanks for your help..

2

Add 2 default routes, the first with distance 1 and other with distance 2.

When the route with distance 1 is not reachable the router use the second route with distance 2.

Send from my mobile phone using Tapatalk.

3

+1… if you don’t want to do it that way I have a script I could modify to do that if you want me to post it… Just let me know.

4

Thank you very much for responding.. Yes, I would greatly appreciate you posting the script. I am very “green” to this router. Its intimidating at times because so many of us rely on it at my office. Thanks again!!

5

Yes pls post!! Thanks!!

6

You need routing marks so it can direct the pings out of the specific links… You can modify it as you want it.
#########################################################

Variables

#########################################################
:global pingFailuresWAN01
:global WState01

:global pingFailuresWAN02
:global WState02

:local pingTarget 8.8.8.8
:local failureThreshold 3
:local pingResult

#########################################################

WAN01 - Interface = ether1

#########################################################
:set pingResult [ping $pingTarget count=1 interface=ether1 routing-table=WANID01]
:if ($pingResult = 0) do={
:if ($pingFailuresWAN01 < ($failureThreshold+2)) do={
:set pingFailuresWAN01 ($pingFailuresWAN01 + 1)
:if ($pingFailuresWAN01 = $failureThreshold) do={
:set WState01 0
/ip firewall address-list add comment=“WANID01” list=“DeadLinkDetector” address=“0.0.0.1”
/ip firewall mangle disable [/ip firewall mangle find comment=“PCC_WANID01”]
}
}
}
:if ($pingResult = 1) do={
:if ($pingFailuresWAN01 > 0) do={
:set pingFailuresWAN01 ($pingFailuresWAN01 - 1)
:if ($pingFailuresWAN01 = ($failureThreshold -1)) do={
:set WState01 1
/ip firewall address-list remove [find list=“DeadLinkDetector” address=“0.0.0.1”]
/ip firewall mangle enable [/ip firewall mangle find comment=“PCC_WANID01”]
}
}
}

#########################################################

WAN02 - Interface = ether2

#########################################################
:set pingResult [ping $pingTarget count=1 interface=ether2 routing-table=WANID02]
:if ($pingResult = 0) do={
:if ($pingFailuresWAN02 < ($failureThreshold+2)) do={
:set pingFailuresWAN02 ($pingFailuresWAN02 + 1)
:if ($pingFailuresWAN02 = $failureThreshold) do={
:set WState02 0
/ip firewall address-list add comment=“WANID02” list=“DeadLinkDetector” address=“0.0.0.2”
/ip firewall mangle disable [/ip firewall mangle find comment=“PCC_WANID02”]
}
}
}
:if ($pingResult = 1) do={
:if ($pingFailuresWAN02 > 0) do={
:set pingFailuresWAN02 ($pingFailuresWAN02 - 1)
:if ($pingFailuresWAN02 = ($failureThreshold -1)) do={
:set WState02 1
/ip firewall address-list remove [find list=“DeadLinkDetector” address=“0.0.0.2”]
/ip firewall mangle enable [/ip firewall mangle find comment=“PCC_WANID02”]
}
}
}

7

Can anyone tell me how to set the timeout on the ping test. My backup ISP is very slow and gives > 3s ping times sometimes so even though it may be working, the script thinks it is not and increases the route distance.