check_snmp to monitor isdn if on cisco?

[Andreas Ericsson]

Schmitz, Carsten wrote:
> Subhendu, all,
> 
> Thanks to all who have replied, the input has been really helpful.
> 
> For the history books, I managed to get it to work. Using snmpwalk
> with numeric oid output I got the OIDs (what a neat trick, that'll
> save me lots of googling).
> 

Some history book additions.
To 'neatify' it further in the interface-to-index translation;
snmpwalk -v 1 -c <community> -Onq <ip> .1.3.6.1.2.1.2.2.1.2 | cut -b22-

The digit is the interface index. The string is the interface description.

> Tried with check_ifoperstatus but didn't quite get the parameters
> right. Now I'm doing:
> 
> ./check_snmp --oid=.1.3.6.1.2.1.2.2.1.8.29 -C community_string -H
> ip_address
> 
> which checks interfaces.ifTable.ifEntry.ifOperStatus.29 (with 29
> being an ISDN interface).
> 
> Returns 5, which means "dormant" according to Cisco, and that looks
> just like the piece of information I need.
> 

Perhaps, but I doubt it will turn red if it goes up. Try 
check_ifoperstatus with 29 as interface index number. I believe you can 
specify what a particular status should mean using that plugin (perhaps 
you'll need to use negate to make it do what you want.

> Thanks, Carsten
> 
> -----Original Message----- From: Subhendu Ghosh
> [mailto:sghosh at sghosh.org] Sent: Wednesday, January 26, 2005 4:05 PM 
> To: Schmitz, Carsten Cc: nagios-users at lists.sourceforge.net Subject:
> Re: [Nagios-users] check_snmp to monitor isdn if on cisco?
> 
> 
> On Wed, 26 Jan 2005, Schmitz, Carsten wrote:
> 
> 
>> Hi,
>> 
>> Is anyone using Nagios to monitor the ISDN / SDSL ports on a Cisco
>> 2600 or 828, respectively?
>> 
>> The network folks told me I should be able to send queries with
>> snmp. Did that before (I monitor Windows boxes with snmp which
>> works fine). But I can't get data from the device and I think maybe
>> I have the wrong "oid".
>> 
>> I'm not an expert on snmp, I pieced together OIDs from
>> 
>> ftp://ftp.cisco.com/pub/mibs/oid/CISCO-ISDN-MIB.oid   and 
>> http://carsten.familie-doh.de/mibtree/cisco-isdn.html
>> 
>> and end up with something like this:
>> 
>> /usr/local/nagios/libexec/check_snmp -H ip_address -C
>> community_string -o ".1.3.6.1.4.9.9.26.1.1.1.16" SNMP problem - No
>> data recieved from host CMD: /usr/bin/snmpget -t 1 -r 9 -m ALL -v 1
>> -c aegongs 212.29.172.2:161  .1.3.6.1.4.9.9.26.1.1.1.16
>> 
>> Anyone done this before and could confirm, or supply me with a
>> valid OID?
> 
> 
> I haven't done anything with this particular MIB - but your OID is 
> incomplete for check_snmp.
> 
> the base oid should be  .1.3.6.1.4.9.9.26.1.1.1.1.16 (note four 1s
> between 26 and 16)
> 
> To the base oid you need to append the table index values namely: 1.
> demandNbrPhysIf (the ifIndex value of the D channel for the neighbor)
>  2. demandNbrId (a table sequence number)
> 
> 
> Also the base oid above - is for RowStatus and does not tell you
> anything about the line being up/down .
> 
> The NeighborTable only stores call information.
> 
> for the object descriptions... 
> ftp://ftp.cisco.com/pub/mibs/v2/CISCO-ISDN-MIB.my
> 
> What do you want to monitor for the isdn connections?
> 

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Lead Developer


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