sit0 device and SNMP

brumela · 10-21-2004, 01:58 PM

hi,

My system is Fedora 1

When I run
$ snmpwalk -v 1 -c public localhost ifDescr

i get this:

Quote:

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:

Quote:

...
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

Franklin · 10-22-2004, 05:50 AM

This has to do with "IPv6-to-IPv4 tunnel" being enabled by default in fedora. If you don't need it you may have to recompile the kernel to keep it from starting. If it's a module, you may be able to stop it from loading - I don't use fedora so I can't tell you how. I would suggest that you google this - as I did. There seem to be a lot of fedora-related threads on this issue. I did not see a definitive solution, but then I was only looking for a definition.

HTH

brumela · 10-24-2004, 08:26 AM

I solve the problem in mrtg.cfg

I use
Target[myhost]: /x.x.x.x:public@myhost:

(where x.x.x.x is ppp0 IP address)
instead of

Target[myhost]: 5:public@myhost: