sit0 device and SNMP

[b r u ma]

Fernando Gozalo wrote:
>>b r u ma wrote:
>>
>>>hi,
>>>
>>>This is question for Fedora 1, not sure if this is right list, but any
>>>way ...
>>>
>>>When I run
>>>$ snmpwalk -v 1 -c public localhost ifDescr
>>>
>>>i get this:
>>>IF-MIB::ifDescr.1 = STRING: lo
>>>IF-MIB::ifDescr.2 = STRING: eth0
>>>IF-MIB::ifDescr.3 = STRING: eth1
>>>IF-MIB::ifDescr.4 = STRING: eth2
>>>IF-MIB::ifDescr.5 = STRING: ppp0
>>>IF-MIB::ifDescr.6 = STRING: sit0
>>>
>>>but sometimes after reboot, ppp0 and sit0 device change order:
>>>...
>>>IF-MIB::ifDescr.4 = STRING: eth2
>>>IF-MIB::ifDescr.5 = STRING: sit0
>>>IF-MIB::ifDescr.6 = STRING: ppp0
>>>
>>>I use SNMP to monitor traffic (MRTG) on ppp0, because of this switching,
>>>I'm sometimes monitoring wrong data...
>>>
>>>Strange thing is that I never used sit0 device, also $ifconfig don't
>>>list it, so why is there? How do I remove it, or make it fixed?
>>>
>>>regards bruma
>>>
>>
>>I've talked a little with the net-snmp folks and if you look at the
>>mailinglist of the net-snmp-coders-list they are working on fixing this
>>ordering.
>>
>>Don't forget though that adding new devices during the runtime of your
>>system can lead to these kinds of changes, no matter what.
>>
>>Read ya, Phil
>>
>>PS: And yes, i agree, it's very annoying that it does this, but imho
>>MRTG would just need to be a little more intelligent and one should be
>>able to specify a device name instead of a index number for monitoring.
>>So one could argue that it's actually a (design) bug in MRTG.
> 
> 
> You can config MRTG to query using the IP configured in the interface
> instead of the index of the interface. See MRTG config manual.
> 
> Un saludo.
> Fernando.
> 
> 
thanks for tip Fernando :)