help on check_snmp

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attilay2k
Posts: 11
Joined: Sat Feb 22, 2020 5:58 am

help on check_snmp

Post by attilay2k »

Hi all
i'm using Nagios Core 4.4.2 on my raspberry pi 4b to monitor my devices status.
i'm trying to monitor my 3 Alcatel.Lucante AP1101 Access point thei are answering to my check_ping but when i try to get more info via

./check_snmp -H xxx.xxx.xxx.xxx -C myPrivate -o 1.3.6.1.4.1.6486.802.1.1.2.1.2.1
i got the following errors
External command error: Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: iso.3.6.1.4.1.6486.802.1.1.2.1.2.1


Note: i'm using Alcatel-Lucent AWOS_3_0_6_MIBs.

please help me to understand what's wrong.
Thanks in advance
scottwilkerson
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Re: help on check_snmp

Post by scottwilkerson »

Can you do a snmpwalk to see if that OID exists on the device

Code: Select all

snmpwalk -v 2c -On -c 'myPrivate' xxx.xxx.xxx.xxx .1.3.6.1.4.1.6486.802.1.1.2.1.2.1
If you get "No Such Instance currently exists at this OID" back lets make sure we can connect to to the device from a walk from the top

Code: Select all

snmpwalk -v 2c -On -c 'myPrivate' xxx.xxx.xxx.xxx
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attilay2k
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Re: help on check_snmp

Post by attilay2k »

Hi @scottwilkerson
this is the output of the command
snmpwalk -v 2c -On -c 'MyPrivate' xxx.xxx.xxx.xxx .1.3.6.1.4.1.6486.802.1.1.2.1.2.1

.1.3.6.1.4.1.6486.802.1.1.2.1.2.1 = STRING: "XX:XX:XX:XX:XX:XX"
Error: OID not increasing: .1.3.6.1.4.1.6486.802.1.1.2.1.2.1
>= .1.3.6.1.4.1.6486.802.1.1.2.1.2.1

if I omit the OId I get a list of OId of which I report the first part

.1.3.6.1.2.1.1.1.0 = STRING: OAW-AP1101 3.0.6
.1.3.6.1.2.1.1.2.0 = OID: .1.3.6.1.4.1.6486.802.1.1.2.1.2.1
.1.3.6.1.2.1.1.3.0 = Timeticks: (20683382) 2 days, 9:27:13.82
.1.3.6.1.2.1.1.4.0 = STRING: http://www.al-enterprise.com
.1.3.6.1.2.1.1.5.0 = STRING: MyAccessPointName
.1.3.6.1.2.1.1.6.0 = STRING: MyLocation
.1.3.6.1.2.1.1.7.0 = INTEGER: 78
.1.3.6.1.2.1.1.9.1.2.1 = OID: .1.3.6.1.2.1.4
.1.3.6.1.2.1.1.9.1.2.2 = OID: .1.3.6.1.6.3.1
.1.3.6.1.2.1.1.9.1.2.3 = OID: .1.3.6.1.2.1.49
.1.3.6.1.2.1.1.9.1.2.4 = OID: .1.3.6.1.2.1.50
.1.3.6.1.2.1.1.9.1.2.5 = OID: .1.3.6.1.6.3.16.2.2.1
.1.3.6.1.2.1.1.9.1.2.6 = OID: .1.3.6.1.6.3.10.3.1.1
.1.3.6.1.2.1.1.9.1.2.7 = OID: .1.3.6.1.6.3.11.3.1.1
.1.3.6.1.2.1.1.9.1.2.8 = OID: .1.3.6.1.6.3.15.2.1.1
.1.3.6.1.2.1.1.9.1.2.9 = OID: .1.3.6.1.2.1.10.131
.1.3.6.1.2.1.1.9.1.3.1 = STRING: The MIB module for managing IP and ICMP implementations
.1.3.6.1.2.1.1.9.1.3.2 = STRING: The MIB module for SNMPv2 entities
.1.3.6.1.2.1.1.9.1.3.3 = STRING: The MIB module for managing TCP implementations
.1.3.6.1.2.1.1.9.1.3.4 = STRING: The MIB module for managing UDP implementations
.1.3.6.1.2.1.1.9.1.3.5 = STRING: View-based Access Control Model for SNMP.
.1.3.6.1.2.1.1.9.1.3.6 = STRING: The SNMP Management Architecture MIB.
.1.3.6.1.2.1.1.9.1.3.7 = STRING: The MIB for Message Processing and Dispatching.
.1.3.6.1.2.1.1.9.1.3.8 = STRING: The management information definitions for the SNMP User-based Security Model.
.1.3.6.1.2.1.1.9.1.3.9 = STRING: RFC 2667 TUNNEL-MIB implementation for Linux 2.2.x kernels.
scottwilkerson
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Re: help on check_snmp

Post by scottwilkerson »

Ok, I noticed in you test command you were not specifying the protocol vumber

Can you try

Code: Select all

./check_snmp -H xxx.xxx.xxx.xxx -P 2c -C myPrivate -o 1.3.6.1.4.1.6486.802.1.1.2.1.2.1
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attilay2k
Posts: 11
Joined: Sat Feb 22, 2020 5:58 am

Re: help on check_snmp

Post by attilay2k »

mmm .. maybe my previous post was not so clear, sorry

using
snmpwalk -v 2c -On -c MyPrivate xxx.xxx.xxx.xxx > snmpwalk.log
i get a list of over 4800 OIDs, but i dont understand the hierarchy
if y run
./check_snmp -H xxx.xxx.xxx.xxx -C MyPrivate -o .1.3.6.1.2.1.25.1.4.0
i can get this result
SNMP OK - "ramdisk_size=128M mem=126M board=AP152_AFI console=ttyS0,115200 mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,1536k(kernel)," |

there is no way to get all information hierarchy??
please find attached snmpwalk.log
Attachments
snmpwalk.txt
(210.51 KiB) Downloaded 164 times
scottwilkerson
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Re: help on check_snmp

Post by scottwilkerson »

Based on the walk results file you posted, .1.3.6.1.4.1.6486.802.1.1.2.1.2.1 isn't a valid OID in the tree
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attilay2k
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Re: help on check_snmp

Post by attilay2k »

ok it's clear that this OID is not valid but ho can i check my access point with a single check_snmp? which is the tree root?
scottwilkerson
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Re: help on check_snmp

Post by scottwilkerson »

attilay2k wrote:ok it's clear that this OID is not valid but ho can i check my access point with a single check_snmp? which is the tree root?
The tree root is always .1

But you cannot "check" a whole tree, if you just want to verify connectivity you can use .1.3.6.1.2.1.1.1.0 and it should return the string OAW-AP1101 3.0.6
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attilay2k
Posts: 11
Joined: Sat Feb 22, 2020 5:58 am

Re: help on check_snmp

Post by attilay2k »

thanks for your reply, last question:

based on snmpwalk log file previously attached, how can i relate a vlan, a network interface, and all the devixes connected with theyr ip?

there must be a way to relate them togheter
scottwilkerson
DevOps Engineer
Posts: 19396
Joined: Tue Nov 15, 2011 3:11 pm
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Re: help on check_snmp

Post by scottwilkerson »

attilay2k wrote:thanks for your reply, last question:

based on snmpwalk log file previously attached, how can i relate a vlan, a network interface, and all the devixes connected with theyr ip?

there must be a way to relate them togheter
This one you're gonna be on your own.... I would suggest asking that question the the manufacturer.
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