Different responses from command line than from library

[maufc]

Hi.
I have some troubles trying to comunitate with some ComAp Controllers using this library.
We got 16 units, 6 AMF-25 and 10 PWR models. All same model units got the same firmware.
I always got an answer if I use snmpget from the command line but it fails randomly (independently of the model)
The response I got is the following:
{ ResponseInvalidError: OID '1.3.6.1.4.1.28634.6.3780509972.2.8198.0' in request at positiion '0' does not match OID '1.3.6.1.4.1.28634.6.-514457324.2.8198.0' in response at position '0'
at Object.feedCb (/home/mauricio/server/node_modules/net-snmp/index.js:626:22)
at Object.Session.onSimpleGetResponse [as onResponse] (/home/mauricio/server/node_modules/net-snmp/index.js:951:7)
at Session.onMsg (/home/mauricio/server/node_modules/net-snmp/index.js:920:9)
at emitTwo (events.js:126:13)
at Socket.emit (events.js:214:7)
at UDP.onMessage [as onmessage] (dgram.js:659:8)
name: 'ResponseInvalidError',
message: 'OID '1.3.6.1.4.1.28634.6.3780509972.2.8198.0' in request at positiion '0' does not match OID '1.3.6.1.4.1.28634.6.-514457324.2.8198.0' in response at position '0'' }
What would be the problem that fails using the library but it doesn't when using snmp from the command line.
Thanks!

[stephenwvickers]

Hi @maufc,

So it looks like the large integer in the OID is not being parsed correctly.

Are you able to provide a packet trace of the query and response so I can troubleshoot it further?

Thanks

Steve

[maufc]

Hi. I'm sorry I couldn't answer before.
I couldn't provide the packet Trace of the query or the response. If you can tell me how to do it I will.
Could it be dice on some other way?
Thanks

[stephenwvickers]

So it looks like you are on a Lunix host, in which case do something like (untested):

tcpdump -w capture.cap -i any port 161

Recreate the issue, then attach the resulting capture.cap file.

[maufc]

Hi.
Sorry for the late response...
According to this, I do get an answer from the device but I still get an error on the command line.
This is the capture:
19:06:53.676674 IP generador-NUC7i3BNH.46454 > 153.0.0.140.snmp: GetRequest(37) E:28634.6.3607365907.2.8198.0
19:06:53.685290 IP 153.0.0.140.snmp > generador-NUC7i3BNH.46454: GetResponse(38) E:28634.6.3607365907.2.8198.0=11
This is the response on command line:
{ ResponseInvalidError: OID '1.3.6.1.4.1.28634.6.3607365907.2.8198.0' in request at positiion '0' does not match OID '1.3.6.1.4.1.28634.6.-687601389.2.8198.0' in response at position '0'
at Object.feedCb (/home/generador/server/node_modules/net-snmp/index.js:626:22)
at Object.Session.onSimpleGetResponse [as onResponse] (/home/generador/server/node_modules/net-snmp/index.js:951:7)
at Session.onMsg (/home/generador/server/node_modules/net-snmp/index.js:920:9)
at emitTwo (events.js:126:13)
at Socket.emit (events.js:214:7)
at UDP.onMessage [as onmessage] (dgram.js:659:8)
name: 'ResponseInvalidError',
message: 'OID '1.3.6.1.4.1.28634.6.3607365907.2.8198.0' in request at positiion '0' does not match OID '1.3.6.1.4.1.28634.6.-687601389.2.8198.0' in response at position '0'' }
IP 153.0.0.140-- no response mon -- OID: 1.3.6.1.4.1.28634.6.3607365907.2.8198.0

Hope you understand where the problem is.

Thanks!

[maufc]

This topic was never solved.