Use snmp to find out what ip addresses go to which port numbers

[EonsNearby]

As the title suggests, I need to find out which ip addresses (or MAC addresses, either will work) go belong to which port numbers. I have used the following snmpwalk command to be able to find out every ip address, MAC address, Network address, and port is active (it finds other information as well, but I don't know what to do with them):

snmpwalk -v 1 [NAME_OF_ROUTER] -c [PASSWORD]

I just want to know, is there a way to correlate the ip address or MAC address to its respective port number?

 

[bnorton916]

The ifTable should tell you this.

1.3.6.1.2.1.2.2(ifTable)

1.3.6.1.2.1.2.2.1.6(ifPhysAddress) will give you the mac address.


Bill

 

[EonsNearby]

I don't think 1.3.6.1.2.1.2.2.1.6(ifPhysAddress) gives me the MAC address. I know what my MAC address is, and none of the entries from 1.3.6.1.2.1.2.2.1.6(ifPhysAddress) are anything close to my MAC address (unless they are in a different format). Also, how does the ifTable tell me the correlation? It just seems to give me the same information I can find with snmpwalk -v 1 [NAME_OF_ROUTER] -c [PASSWORD]

 

[bnorton916]

Object ifPhysAddress
OID 1.3.6.1.2.1.2.2.1.6
Type PhysAddress
Permission read-only
Status current
MIB IF-MIB ; - View Supporting Images
Description "The interface's address at its protocol sub-layer. For
example, for an 802.x interface, this object normally
contains a MAC address. The interface's media-specific MIB
must define the bit and byte ordering and the format of the
value of this object. For interfaces which do not have such
an address (e.g., a serial line), this object should contain
an octet string of zero length."

Maybe show a walk of the ifTable here?

Bill