Saving SNMP to variable

RouterOS Scripting
1

I do try to save output of Tool SNMP to a variable or send it to syslog. It does not seem to work:

I need to store/send to log, the the output of:

/tool snmp-walk community=public version=2c address=127.0.0.1 oid=1.3.6.1.2.1.1

Tried this, but just give output to console.

{
:local test [/tool snmp-walk community=public version=2c address=127.0.0.1 oid=1.3.6.1.2.1.1]
:put $test
}




{
:local test [/tool snmp-walk community=public version=2c address=127.0.0.1 oid=1.3.6.1.2.1.1]
:log info message="$test"
}

Mikrotik does log that I do run the SNMP command, but not output of it.

snmp MikroTik: getnext 1.3.6.1.2.1.1.7.0
snmp MikroTik: getnext 1.3.6.1.2.1.1.6.0
snmp MikroTik: getnext 1.3.6.1.2.1.1.5.0
snmp MikroTik: getnext 1.3.6.1.2.1.1.4.0
snmp MikroTik: getnext 1.3.6.1.2.1.1.3.0
snmp MikroTik: getnext 1.3.6.1.2.1.1.2.0
snmp MikroTik: getnext 1.3.6.1.2.1.1.1.0
snmp MikroTik: getnext 1.3.6.1.2.1.1

If this does not work, please add this to later build.

PS from the manual:
Return value to a variable
Since RouterOS v6.43 it is possible to save the result of fetch command to a variable
So add it to all tools

2

The same with reading lte cell-monitor feature…

Only way I know is via file… http://forum.mikrotik.com/t/send-script-output-to-a-file/116250/1

execute "/tool snmp-walk community=public version=2c address=127.0.0.1 oid=1.3.6.1.2.1.1" file=out.txt
file edit out.txt contents 
global out2 [file get out.txt contents]
put [typeof $out2]
str
3

Thanks for this suggestion.
I did send a request about this to MT Support SUP-33094
Having a lot of file write may wear out the flash?

Every command on RouterOS should be able to store data to all type of storage (Flash/Variable/log/syslog ++)

So to get it to syslog id did this:

:execute "/tool snmp-walk community=public version=2c address=127.0.0.1 oid=1.3.6.1.2.1.1" file=out.txt
:log info message=[file get out.txt contents]
4

I agree, and can only say at some netinstall RouterBoards we can write file into memory (ram disk, tempfs, etc.), not NAND

5

If anyone interested, it’s now possible to get an oid value inside script by using as-value property. I don’t know in which ROS version it appeared, but in 7.8 it exists and works.

:local snmpvar [/tool snmp-get address=x.x.x.x oid=x.x.x... as-value]
:log info ($snmpvar->"value")
6

I had a feature request in for this, and it was closed in late March, so it’s new.

:put [/tool/snmp-get address=127.0.0.1  oid=1.3.6.1.4.1.14988.1.1.3.8.0 community=public as-value ]                      
# oid=1.3.6.1.4.1.14988.1.1.3.8.0;type=integer;value=517

One note, the value returned seems to always be a string type (but reports the original SNMP type in type=).

:put [:typeof ([/tool/snmp-get address=127.0.0.1  oid=1.3.6.1.4.1.14988.1.1.3.8.0 community=public as-value ]->"value") ] 
# str