pysnmp-users

[pysnmp-users] SNMP not getting a value

[Carles P. i E. <ca...@pi...>]

Hello,

We are using pysnmp for more than one year and works really good, thanks
for the nice piece of software.

Now we have a problem trying to get a value. I can get some of the
values like:

[(ObjectName('1.3.6.1.2.1.2.2.1.4.1'), Integer32('1500'))]

But some other value returns an empty value:
()

When should return:
snmpwalk -v2c -c PASSWD 10.1.1.111 1.3.6.1.2.1.2.2.1.10.1
IF-MIB::ifInOctets.1 = Counter32: 3089151836

Is it a 32 bits value not supported?
The correct value in this case is >2^31 and < 2^32 but I have tested
another machine with a value <2^31 and it's not working either.

We are using a Debian stable with:
python-pysnmp-common            4.1.6a-1
python-pysnmp4                  4.1.6a-1
python-pysnmp4-mibs             0.0.4a-1

The code to get a value is:
--------
newmibs=tuple(newmibs)
errorIndication, errorStatus, errorIndex, varBinds =
apply(cmdgen.CommandGenerator().getCmd,(cmdgen.CommunityData('my-agent',PASSWD,0),cmdgen.UdpTransportTarget((IP, PORT))) + newmibs)
print varBinds
print errorIndication,errorStatus,errorIndex
--------

If it's working I get:
--------
[(ObjectName('1.3.6.1.2.1.2.2.1.4.1'), Integer32('1500'))]
None 0 0
--------

If it's not working:
--------
()
requestTimedOut 0 0
--------

But using snmpwalk I can get both values.

Thank you very much!

-- 
Carles Pina i Estany		GPG id: 0x8CBDAE64
	http://pinux.info	Manresa - Barcelona

Re: [pysnmp-users] SNMP not getting a value

[Ilya E. <il...@gl...>]

A non-empty "errorIndication" means request failure, in your case - 
requestTimeout, what leads to empty result.

SNMP protocol supports 32-bit width integers so 2^32 values will pass 
through.

>From your description it looks like your SNMP Agent is sometimes slow 
responding to your requests. You may want to try increasing timeout value 
in your SNMP Manager script:

UdpTransportTarget(
  transportAddr,
  timeout,
  retries
)

-ilya

[ skipped ]

> The code to get a value is:
> --------
> newmibs=tuple(newmibs)
> errorIndication, errorStatus, errorIndex, varBinds =
> apply(cmdgen.CommandGenerator().getCmd,(cmdgen.CommunityData('my-agent',PASSWD,0),cmdgen.UdpTransportTarget((IP, PORT))) + newmibs)
> print varBinds
> print errorIndication,errorStatus,errorIndex
> --------
> 
> If it's working I get:
> --------
> [(ObjectName('1.3.6.1.2.1.2.2.1.4.1'), Integer32('1500'))]
> None 0 0
> --------
> 
> If it's not working:
> --------
> ()
> requestTimedOut 0 0
> --------

Re: [pysnmp-users] SNMP not getting a value

[Mr.V. R. <raj...@gm...>]

Good Morning to All,


           Can sombody please help me on *py2exe for pysnmp.*

I will be thankful, if you help me with sample source code.

Thank You.
Raj.




On Sat, Jul 12, 2008 at 12:21 AM, Ilya Etingof <il...@gl...> wrote:

>
> A non-empty "errorIndication" means request failure, in your case -
> requestTimeout, what leads to empty result.
>
> SNMP protocol supports 32-bit width integers so 2^32 values will pass
> through.
>
> >From your description it looks like your SNMP Agent is sometimes slow
> responding to your requests. You may want to try increasing timeout value
> in your SNMP Manager script:
>
> UdpTransportTarget(
>  transportAddr,
>  timeout,
>  retries
> )
>
> -ilya
>
> [ skipped ]
>
> > The code to get a value is:
> > --------
> > newmibs=tuple(newmibs)
> > errorIndication, errorStatus, errorIndex, varBinds =
> >
> apply(cmdgen.CommandGenerator().getCmd,(cmdgen.CommunityData('my-agent',PASSWD,0),cmdgen.UdpTransportTarget((IP,
> PORT))) + newmibs)
> > print varBinds
> > print errorIndication,errorStatus,errorIndex
> > --------
> >
> > If it's working I get:
> > --------
> > [(ObjectName('1.3.6.1.2.1.2.2.1.4.1'), Integer32('1500'))]
> > None 0 0
> > --------
> >
> > If it's not working:
> > --------
> > ()
> > requestTimedOut 0 0
> > --------
>
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