So in this example, in our Wireshark capture, we have a MIB 1.3.6.1.2 and so forth and
so on. In the engineer's toolkit, which I've installed on this VM, I've opened up the MIB browser and noticed
one is ISO. So the OID is 1
3 organization, 6
is DOD, so 1.3.6 is ISO ORG DOD.
1 is Internet, 2 is management, so at this point at the moment.
Well I need to choose 1, which is MIB 2, MIB 2 is what we saw in the RFCs.
So notice, MIB 2 this is RFC 1158 which has been obsoleted by RFC 12
13 over here.
So management information base for network management MIB 2.
So that's MIB 2, their system as an example, but what we've got here
is 31, so scrolling down
31 is fMIB
then we've got 1 for objects,
1 for xtable another one for xentry
1 for fPhase
and then we've got a value of 2, so this is the textural name of the interface.
This might be a text name such as LE0 or a simple number such as 1, depending on the interface
naming Syntex of the device.
If we have a look at another 1.3.6.1.2, so if we scroll up
1.3.6.
1.2.1, so we're back on MIB 2
2 interfaces, 2 is IF table, one is an entry,
2 is a description.
So this is the interface description information, so the moral of the story is you can walk the MIB
using the MIB browser in this application to work out what these OID values actually mean or referred to.
Fortunately for us, NPM shows us in a nice graphical format.
So you get information about the device and you also get information about the interfaces.
So shown here in a nice, easy to read format.