David,

I think you had the same confusion as me, regarding how to find MAC addresses of nodes (computers).

1) Start by clicking on the name of a device. (You can search for it on the top right)

2) Click on the "Ports" tab.

3) If this is a router, there will be a tab called "ARP/NDP Table", this is IPv4 and IPv6 mapping of MAC address to IP address. If this device was only a layer-2 switch, then this tab would not be displayed.

4) There is a tab called "FDB Table", this is the mapping of MAC address to switchport. (I have always called this the CAM table). Due to the functionality of broadcasts, this will show every device in the same VLAN (the MAC address is seen on switch uplinks)

However, I wish there was a node lookup tool that showed which switchport a computer was plugged into. We should be able to identify the interface closest to the computer by removing all interfaces that are CDP/LLDP neighbors with another known network device. Does this make sense?

Cheers,

Tristan

Tristan Rhodes
Network Engineer

Weber State University

801.626.8549

On Thu, Sep 11, 2014 at 8:18 AM, Spencer Gaw <spencerg@frii.net> wrote:

You might want to read up on SNMP and how it operates. Observium does not run commands on any device - it merely reports the data it gathers via SNMP.

Regards,

SG

On 9/11/2014 4:31 AM, Dudu wrote:

Hi All,
I'm new here and I'm not sure about the port view. I can see the neighbours and computers on the vlan on right side , the command looks like show ip arp

Maybe it's better to map the computer to the port itself? sh mac address-table

So out of the box we will know which server is connected to which port. That could help to find VM's as well.

Many Thanks
David.

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