sit0 device and SNMP

[b r u ma]

Phil Knirsch 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.
> 

I agree, that would be better to specify device name in MRTG, but I was 
using same configs on previus system (RedHat 9 on same machine), without 
any problems ...

thanks any way, I think, I would do work around with script at bootup...

regards bruma