How to set BITS data type in SNMPSET command?

Question

the MIB OID object have data type 'Bits':

object_OID
Composed Type: Bits
Base Type: BITS
Access: read-write
Kind: Scalar
SMI Type: OBJECT-TYPE
Value List: 
doc (0)
emta (1)
cpe (2)

From MIB description, default is DEFVAL { '00'h }. I want set value 2 (cpe). I tried to set the value with command

snmpset -v2c -c public 192.168.100.1  [object_OID] b 2

but got

Error in packet.
Reason: wrongValue (The set value is illegal or unsupported in some way)

tried also

snmpset -v2c -c public 192.168.100.1  [object_OID] i 2

again error

Error in packet.
Reason: wrongType (The set datatype does not match the data type the agent expects)

Snmpget against this object returns Hex-STRING: 00 What is proper format to set value 2 for BITS data type?

score 2 · Answer 1 · answered Sep 17 '14 at 14:09

2

You're using the correct syntax to set a BITS value. I would hazard a guess that the agent implementation is faulty (i.e. the agent is not following the MIB definition).

answered Sep 17 '14 at 14:09

Jolta

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Likely. The enumeration is encoded most-significant-bit-first, and it's easy for an agent to get this wrong. Pretty catastrophic for managers, though. – Lightness Races in Orbit Nov 13 '17 at 23:43
OP could try working around it by setting to 64, though. – Lightness Races in Orbit Nov 13 '17 at 23:44

score 1 · Answer 2 · answered May 22 '19 at 08:05

1

A correct Syntax for Net-SNMP is:

snmpset -v2c -c public 192.168.100.1   $ObjectId   = 'emta cpe'

answered May 22 '19 at 08:05

lathspell

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Is that really true? Can you confirm via Wireshark that it does the right thing? – Lightness Races in Orbit May 24 '19 at 10:50
Okay I have Wiresharked it and this is right (Net-SNMP does the translation automatically!). Note that on Windows you'll need double quotes, not single quotes, if using the cmd.exe shell. – Lightness Races in Orbit May 24 '19 at 11:04

score 0 · Answer 3 · edited Apr 04 '22 at 14:30

0

i
INTEGER
u
UNSIGNED
s
STRING
x
HEX STRING
d
DECIMAL STRING
n
NULLOBJ
o
OBJID
t
TIMETICKS
a
IPADDRESS
b
BITS

Change the value according to data type

Example for trap IP Change -

snmpset -v2c -c private 192.168.0.1  OID  a  '10.12.14.190'

edited Apr 04 '22 at 14:30

joanis

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answered Apr 04 '22 at 11:13

Ankur Kumar Srivastava

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1
1

How to set BITS data type in SNMPSET command?

3 Answers3

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