Don't get snmp/mrtg to work on Asus RT-AC66U with WRT-Merlin

[stamnesn]

Hi...

i having trouble to get snmp/mrtg to work on my Asus RT66u router with merlin 380.70.
I had the same problems on the earlier version to.

I have enabled the snmp.
Set the SNMP access from wan to off.

SNMP Get Community - TestR
SNMP Set Community - TestRW

when i'm trying to make cfg file to mrtg i get this error. Working on my smartswitches, but not the router.

C:\mrtg-2.17.4\bin>perl cfgmaker TestR@192.168.10.1 --global "WorkDir: c:\www\mrtg" --output mrtg.cfg
--base: Get Device Info on TestR@192.168.10.1:
SNMP Error:
no response received
SNMPv1_Session (remote host: "192.168.10.1" [192.168.10.1].161)
community: "TestR"
request ID: -1995714629
PDU bufsize: 8000 bytes
timeout: 2s
retries: 5
backoff: 1)
at C:/mrtg-2.17.4/bin\..\lib\mrtg2/SNMP_util.pm line 651.
SNMPWALK Problem for 1.3.6.1.2.1.1 on TestR@192.168.10.1::::::v4only
at cfgmaker line 951.
WARNING: Skipping TestR@192.168.10.1: as no info could be retrieved

Use of uninitialized value $comment_sysdescr in substitution (s///) at cfgmaker line 379.
Use of uninitialized value $sysname in concatenation (.) or string at cfgmaker line 412.
Use of uninitialized value $comment_sysdescr in concatenation (.) or string at cfgmaker line 412.
Use of uninitialized value $syscontact in concatenation (.) or string at cfgmaker line 412.
Use of uninitialized value $syslocation in concatenation (.) or string at cfgmaker line 412.
--base: Writing mrtg.cfg

 

[RMerlin]

SNMPv1_Session (remote host: "192.168.10.1" [192.168.10.1].161)

Asuswrt-Merlin supports SNMPv2 and v3 AFAIK.

 

[stamnesn]

Does it support v2c?
Geting the same issue with 2c as with v1

 

[sfx2000]

1) Go To Administration and click on SNMP.
2) Enable SNMP, enter a system name, system location, SNMP Get Community (just any text, this acts like a password).
3) Click on Apply to activate the changes.

This should get AsusWRT working for SNMP as an agent.

Then do an snmpwalk against the device -- snmpwalk -Os -c public -v2c 192.168.1.1 iso.3.6.1.2.1.1.1

Should do the trick there... if you want to get more info -- snmpwalk -Os -c public -v2c 192.168.1.1

C:\mrtg-2.17.4\bin>perl cfgmaker TestR@192.168.10.1 --global "WorkDir: c:\www\mrtg" --output mrtg.cfg

MRTG runs better under Linux - under Windows, even with recent changes, it's not optimal.

 

[kvic]

Does it support v2c?
Geting the same issue with 2c as with v1

For RT56, I used mini_snmpd package from Entware. It only consumes 500KB memory. Good for my purpose. Entware has a full-blown snmpd package as well in case you run out of other options.

Glad to hear people out there still using MRTG . I have a modified version running on my RT56. Here is a SCREENSHOT: cpu load of ER-X taken by MRTG running on RT56.

 

[sfx2000]

Glad to hear people out there still using MRTG . I have a modified version running on my RT56. Here is a SCREENSHOT: cpu load of ER-X taken by MRTG running on RT56.

MRTG is lightweight - and does pretty well within what's it's designed to do - runs really nice on Raspberry Pi2 and above - and its already included in the Raspbian distros...