Re: SNMP devices with non-consecutive interface OIDs

This can be handled by a specific option, at least for net-snmp.
We (IMHO) never used that option but may provide it as a configurable switch (on
global level???) for future versions.
Please post a feature request then to http://bugs.cacti.net

Reinhard

On 06.05.2012 23:36, Christian Gresser wrote:
> Hello list,
> 
> I'm not sure if this classifies as a bug but nevertheless, here we go ...
> 
> I've noticed that Cacti (0.8.8) currently can't handle devices with
> non-consecutive interface OIDs like the Teldat (formerly Funkwerk) Bintec
> router (like http://www.teldat.de/en/bintec-RS120-173,113477.html). While
> these devices most probably don't follow RFC standards, they still exist and
> are used in many companies. 
> 
> What seems to happen is, that Cacti detects the number of interfaces but
> fails to enumerate them:
> 
> ----------
> Data Query Debug Information
> + Running data query [1].
> + Found type = '3' [SNMP Query].
> + Found data query XML file at
> '/var/www/cacti/resource/snmp_queries/interface.xml'
> + XML file parsed ok.
> + Executing SNMP get for num of indexes @ '.1.3.6.1.2.1.2.1.0' Index Count:
> 8
> + Executing SNMP walk for list of indexes @ '.1.3.6.1.2.1.2.2.1.1' Index
> Count: 0
> + No SNMP data returned
> ----------
> 
> Manually running snmpwalk gives the following output:
> 
> ----------
> # snmpwalk -v 2c -c public 10.0.0.1 .1.3.6.1.2.1.2.1.0
> IF-MIB::ifNumber.0 = INTEGER: 8
> 
> # snmpwalk -v 2c -c public 10.0.0.1 .1.3.6.1.2.1.2.2.1.1
> IF-MIB::ifIndex.0 = INTEGER: 0
> IF-MIB::ifIndex.1 = INTEGER: 1
> IF-MIB::ifIndex.2 = INTEGER: 2
> IF-MIB::ifIndex.1000 = INTEGER: 1000
> IF-MIB::ifIndex.1001 = INTEGER: 1001
> IF-MIB::ifIndex.1400 = INTEGER: 1400
> IF-MIB::ifIndex.1401 = INTEGER: 1401
> IF-MIB::ifIndex.10001 = INTEGER: 10001
> ----------
> 
> As you can see, the ifIndex does not start with 1 but 0 and jumps depending
> on the interface type:
> 
> ----------
> rs120:> ifstat
> Index  Descr        Type Mtu  Speed St Ipkts   Ies Opkts   Oes
> PhyAddr/ChgTime
> 000000 REFUSE       othr 8192     0 up 0       0   0       0     0 00:00:00
> 000001 LOCAL        othr 8192     0 up 0       0   0       0     0 00:00:00
> 000002 IGNORE       othr 8192     0 up 0       0   0       0     0 00:00:00
> 001000 en1-0        eth  1500  100M up 3466225 0   4000640 0
> 00:a0:f9:23:cb:92
> 001001 en1-0-llc    eth  1496  100M up 0       0   0       0
> 00:a0:f9:23:cb:92
> 001400 en1-4        eth  1500  100M up 1086229 0   3750804 0
> 00:a0:f9:23:cb:92
> 001401 en1-4-llc    eth  1496  100M up 0       0   0       0
> 00:a0:f9:23:cb:92
> 010001 Internet     ppp  1492  100M up 1064546 0   3517165 0    13 00:03:40
> ----------
> 
> I tracked the issue down to <install_path>/cacti/lib/data_query.php and to
> the function query_snmp_host. Unfortunately my PHP knowledge is absolutely
> limited to correctly spell PHP. I'm willing to help debugging or test fixes
> (and will provide a small present to the programmer if fixed).
> 
> Thanks,
> 
> Btw: on http://bugs.cacti.net/main_page.php a wrong address is shown for
> this list, [email protected] instead of
> [email protected]. Someone might want to fix that as well. 
> 
> Best regards,
> 
> Christian Gresser
> 
> 
> 
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threat landscape has changed and how IT managers can respond. Discussions 
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