Hi,
i have 2 questions for which i couldnt find anything in the manual:
1. how do i log interface state changes, i need to know when the link goes down and comes back up
2. is there any way to have some sort of Keepalive on the ethernet interfaces, it so happens that sometimes, some devices flaps their eth links which causes the OSPF tree to be recalculated (which is obvious under normal circumstances), however very short flaps, on light-traffic links do not create many problems, and since the default times on OSPF are 10 hello and 40 dead. It will be rather useful under certain conditions.
Thanks,
Viorel
Re: Interface Operation
i have the same question - is there a way? Anyone?
Re: Interface Operation
This script will detect the running state change of an interface. An action can then be specified upon state change.
Code: Select all
# Detects changes to interface running state
:global InterfaceID
:global InterfaceState
:local findindex
:local prevstate
:local curstate
:local tmpstate
/interface {
:foreach i in=[find] do={
:set curstate [:tostr [get $i running]]
:if ([:len $curstate] = 0) do={ :set curstate [:tostr false] }
:set findindex [:find [:toarray $InterfaceID] [:tostr $i]]
:if ([:len $findindex] > 0) do={
# interface found. compare it's current state to previous state
:set prevstate [:tostr [:pick [:toarray $InterfaceState] $findindex]]
:if ( $prevstate != $curstate ) do={
# --- start interface state change action ---
:put ([get $i name] . " running state changed: " . $prevstate . " -> " . $curstate)
:log info ([get $i name] . " running state changed: " . $prevstate . " -> " . $curstate)
# --- end interface state change action ---
# update interface record with new state
:set tmpstate ""
:for x from=0 to=([:len [:toarray $InterfaceState]] - 1) do={
:set prevstate [:tostr [:pick [:toarray $InterfaceState] $x]]
:if ($x = $findindex) do={
:set tmpstate ([:tostr $tmpstate] . $curstate . ",") } else={
:set tmpstate ([:tostr $tmpstate] . $prevstate . ",") }
}
:set InterfaceState [:tostr $tmpstate]
# end if ( $prevstate != $curstate )
}
} else={
# interface wasn't found, record it's state
:set InterfaceID ([:tostr $InterfaceID] . [:tostr $i] . ",")
:set InterfaceState ([:tostr $InterfaceState] . [get $i running] . ",")
}
# end foreach i
}
# /interface
}
Re: Interface Operation
Cool Cool 
Do you mind explaining how it works?
Do you mind explaining how it works?Re: Interface Operation
1) The script starts off and get's the running state of all interfaces.
2) The script would run via scheduler at specified intervals, for example:
3) Each time the script is run, it checks all interfaces' current running state against their previous state.
3a) If the state changes, an action is performed (in the above case a log entry is created)
3b) If the state is the same, no action is performed.
To customize the action to perform on interface state change, modify the code between:
# --- start interface state change action ---
# --- end interface state change action ---
Also, you could modify the script to support other information (disabled/enabled) (running:true/false), etc..
RouterOS, AFAIK does not have a facility built-in, so this script should be able to track interface state changes.
Try this out on a router and see if it works for you. If not, post back here, and I may be able to assist further.
2) The script would run via scheduler at specified intervals, for example:
Code: Select all
/system scheduler add name="Interface State Check" on-event="<script name>" interval=5s3a) If the state changes, an action is performed (in the above case a log entry is created)
3b) If the state is the same, no action is performed.
To customize the action to perform on interface state change, modify the code between:
# --- start interface state change action ---
# --- end interface state change action ---
Also, you could modify the script to support other information (disabled/enabled) (running:true/false), etc..
RouterOS, AFAIK does not have a facility built-in, so this script should be able to track interface state changes.
Try this out on a router and see if it works for you. If not, post back here, and I may be able to assist further.
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