I am writing to seek assistance with a script I've been working on to monitor latency from different public IPs and enable source NAT to the LAN IP with the lowest latency to a target IP.
Below is the script:
\
Disable all NAT rules
/ip firewall nat set [find comment="SLT"] disable=yes
/ip firewall nat set [find comment="Dialog"] disable=yes
/ip firewall nat set [find comment="Airtel"] disable=yes
Define the target IP
:local targetIP "142.251.42.110"
Define the threshold for latency (30ms)
:local latencyThreshold 30
Ping the target IP from each source address and calculate average latency
:local avgLatency51 [/ping $targetIP interval=1 count=5 src-address=X.X.X1.5]
:local avgLatencyValue51 [:pick ([:find $avgLatency51 "avg-rtt="]) ([:find $avgLatency51 "ms"])]
:local avgLatency52 [/ping $targetIP interval=1 count=5 src-address=X.X.X2.5]
:local avgLatencyValue52 [:pick ([:find $avgLatency52 "avg-rtt="]) ([:find $avgLatency52 "ms"])]
:local avgLatency53 [/ping $targetIP interval=1 count=5 src-address=X.X.X3.5]
:local avgLatencyValue53 [:pick ([:find $avgLatency53 "avg-rtt="]) ([:find $avgLatency53 "ms"])]
Check the average latency values and enable/disable NAT accordingly
:if (($avgLatencyValue51 < $avgLatencyValue52) && ($avgLatencyValue51 < $avgLatencyValue53) && ($avgLatencyValue51 != "")) do={
/ip firewall nat set [find comment="SLT"] disabled=no
/ip address set [find interface=l1] disabled=yes
} else={
/ip firewall nat set [find comment="SLT"] disabled=yes
/ip address set [find interface=l1] comment=here1
}
:if (($avgLatencyValue52 < $avgLatencyValue51) && ($avgLatencyValue52 < $avgLatencyValue53) && ($avgLatencyValue52 != "")) do={
/ip firewall nat set [find comment="Dialog"] disabled=no
/ip address set [find interface=l2] disabled=yes
} else={
/ip firewall nat set [find comment="Dialog"] disabled=yes
/ip address set [find interface=l2] comment=here2
}
:if (($avgLatencyValue53 < $avgLatencyValue52) && ($avgLatencyValue53 < $avgLatencyValue51) && ($avgLatencyValue53 != "")) do={
/ip firewall nat set [find comment="Airtel"] disabled=no
/ip address set [find interface=l3] disabled=yes
} else={
/ip firewall nat set [find comment="Airtel"] disabled=yes
/ip address set [find interface=l3] comment=here3
}
Log the average latency values
:log info "avgLatencyValue51: $avgLatencyValue51"
:log info "avgLatencyValue52: $avgLatencyValue52"
:log info "avgLatencyValue53: $avgLatencyValue53"
While this script functions as expected in terms of enabling/disabling NAT rules based on latency values, it does not calculate the average latency as intended.
What may be causing this issue and any recommendations for resolving it...