Syed Jahanzaib Personal Blog to Share Knowledge !

November 25, 2016

Mikrotik: Switching between interface

Filed under: Mikrotik Related — Tags: , , , — Syed Jahanzaib / Pinochio~:) @ 2:18 PM

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NOT FOR GENERAL PUBLIC

SHARING IT FOR PERSONAL REFERENCE


Following is an script that switches connectivity between two interfaces (usually wan).

Example: ISP x have provided internet connectivity via fiber link . as a backup / redundancy link ISP have provided second fiber line. Both link have same ip address with same gateway. There are other ways too , this is just one way of achieving task. it can be customized in many ways like forcing specific hosts to be monitored by ping and act accordingly , or by having bridge etc.

IP address example:

in /ip address >>>

sfp1 = 10.0.0.1 (with comments “PRIMARY-SFP1”)
[remains enabled until next status changed]

sfp2 = 10.0.0.1 (with comments “SECONDARY-SFP2”)
[remains enabled until next status changed]

The script will do following.

Check the SFP1 Status, if it does not found “linkok” reply, it will log event, send email/sms alert to admin, and switch to SFP2 port by enabling IP of SFP2 [and Disable ip on SFP1]

On next run, if it found SFP1 link ok, then it will log event, send email/sms alert to admin, and switch back to SFP1 port by enabling IP of SFP1 and disable ip on SFP2.


# Mikrotik SPF Link monitoring SCRIPT with optional Email and SMS Alert,
# We are using local KANNEL as SMS gateway and GMAIL as email sender
# by Syed Jahanzaib
# https://aacable.wordpress.com
# Email : aacable at hotmail dot com
# Script Last Modified : 25-NOV-2016 / 1400 hours

# PRIMARY FIBER LINK
:local INT "sfp1"
# SECONDARY BACKUP FIBER LINK
:local INT2 "sfp2"
:local i 0;
:local F 0;
:local date;
:local time;
:global sub1 ([/system identity get name])
:global sub2 ([/system clock get time])
:global sub3 ([/system clock get date])
:set date [/system clock get date];
:set time [/system clock get time];
:local cell1 "03333021909"
:global FIBERnetstatus;
:global FIBERnetlastchange;
:global FIBERIP;

# Company Name, do not use spaces in it
:local COMPANY "ZZZ"

# Setting GMAIL config
:local sub1 ([/system identity get name])
:local sub2 ([/system clock get date])
:local sub3 ([/system clock get time])
:local TO1 "RECIPIENT-1@hotmail.com"
:local gmailid "YOUR-GMAIL-ID@gmail.com"

#If you dont have kannel sms gateway ignore this.
:local KURL "http://10.0.0.1:13013/cgi-bin/sendsms"
:local KID "kannel"
:local KPASS "KANNEL-PASS"

# SMS DOWN status Msg format for Kannel SMS gateway (donot use spaces in it)
:local MSGDOWNSMS "$COMPANY+FIBER+ALERT:%0A$INT+fiber+is+now+DOWN.%0ASwitching+to+$INT2+backup+fiber+link"
# SMS UP status Msg format for Kannel SMS gateway (donot use spaces in it)
:local MSGUPSMS "$COMPANY+FIBER+INFO:%0A$INT+fiber+is+now+UP.%0ASwitching+back+to+$INT"

# EMAIL Msg format for FIBER DOWN
:local MSGDOWNEMAIL "$COMPANY FIBER ALERT: $INT fiber is now DOWN at $sub1 $sub2 $sub3 . Switching to $INT2 backup link. Please Verify it."
# EMAIL Msg format for FIBER UP
:local MSGUPEMAIL "$COMPANY FIBER INFO: $INT fiber is now UP at $sub1 $sub2 $sub3 . Switching back to $INT primary link. Please Verify it."
# LOG error
:local DOWNLOG1 "$COMPANY FIBER ALERT: $INT fiber is now DOWN at $sub1 $sub2 $sub3 . Switching to $INT2 backup link. Please Verify it."
:local UPLOG1 "$COMPANY FIBER INFO: $INT fiber is now UP at $sub1 $sub2 $sub3 . Switching back to $INT primary link. Please Verify it"

######################################
########## Start the SCRIPT ###############
########## DONOT EDIT BELOW ############
######################################

local link;
/interface ethernet cable-test $INT once do={
:set link $"status";
};

:if ($link != "link-ok") do={
:log error "$INT SFP DOWN"

:if (($FIBERnetstatus="UP")) do={
:set FIBERnetstatus "DOWN";

# Also add status in global variables to be used as tracking
:set date [/system clock get date];
:set time [/system clock get time];
:set FIBERnetlastchange ($time . " " . $date);
##################################################
####### FOR DOWN STATUS, CHANGE THE RULES ########
##################################################

# If the link is down, then LOG info and warning in Mikrotik LOG window [Zaib]
:log error "$DOWNLOG1"

# DOWN ACTION , shifting to SFP2 , backup link
/ip address set disabled=yes [find comment="PRIMARY-SFP1"]
/ip address set disabled=no [find comment="BACKUP-SFP2"]

# Adding delay so gateway should be reachable properly
:delay 5s;

:global gmailsmtp
:set gmailsmtp [:resolve "smtp.gmail.com"];

# "Emailing the DOWN status. . . "
/tool e-mail send to=$TO1 subject="$MSGDOWNEMAIL" start-tls=yes body="$MSGDOWNEMAIL"

# Send SMS the DOWN status via KANNEL
/tool fetch url="$KURL\?username=$KID&password=$KPASS&to=$cell1&text=$MSGDOWNSMS"

##################################################
####### FOR UP STATUS, CHANGE THE RULES ########
##################################################

} else={:set FIBERnetstatus "DOWN";}
} else={
:if (($FIBERnetstatus="DOWN")) do={

:set FIBERnetstatus "UP";

# If link is UP, then LOG info and warning in Mikrotik LOG window [Zaib]
:log warning "$UPLOG1"

# UP ACTION , shifting back to SFP1
/ip address set disabled=no [find comment="PRIMARY-SFP1"]
/ip address set disabled=yes [find comment="BACKUP-SFP2"]

# Adding delay so gateway should be reachable properly
:delay 5s;
:global gmailsmtp
:set gmailsmtp [:resolve "smtp.gmail.com"];

# "Emailing the UP status. . . "
/tool e-mail send to=$TO1 subject="$MSGUPEMAIL" start-tls=yes body="$MSGUPEMAIL"

# Send SMS via KANNEL Gateway
/tool fetch url="$KURL\?username=$KID&password=$KPASS&to=$cell1&text=$MSGUPSMS"

:set date [/system clock get date];
:set time [/system clock get time];
:set FIBERnetlastchange ($time . " " . $date);

} else={:set FIBERnetstatus "UP";}
}

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