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Zetera
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Discovering the MAC of a modem plugged into a Mikrotik

Tue May 07, 2019 3:48 pm

I am trying to find out if there is a tool or command that would allow a mikrotik to see the MAC address of a modem that it is using as its WAN connection.

Here is a printout of its ARP table showing the LAN facing MAC address of the modem.

# ADDRESS MAC-ADDRESS INTERFACE
0 DC 184.153.32.1 00:17:10:87:0E:E4 ether1-WAN
1 DC 192.168.88.254 D4:6A:91:07:78:FC ether2-wattBox
2 DC 192.168.87.253 C8:1F:66:AA:19:FF ether3-master-wired
3 DC 10.10.10.254 B4:79:C8:06:71:E0 ether5-trunk-AP
4 DC 10.2.129.254 74:C2:46:89:45:6D vlan229
5 DC 192.168.87.254 58:55:CA:37:8A:7B ether3-master-wired

The ether1-WAN interface contains the connection where I was wondering if I could find the proper WAN-facing MAC address of the modem. In this example I already know the WAN-facing MAC address, 50:95:51:E4:EC:82, but I would like to find out how to get this sort of information via the MikroTik; if at all possible. Any help would be greatly appreciated, thanks!
 
Zetera
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Posts: 52
Joined: Sat Apr 21, 2018 6:57 pm

Re: Discovering the MAC of a modem plugged into a Mikrotik

Tue May 07, 2019 8:01 pm

Bump (don't really want this to get forgotten
 
mkx
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Re: Discovering the MAC of a modem plugged into a Mikrotik  [SOLVED]

Tue May 07, 2019 8:49 pm

I don't think you can get WAN-facing MAC address of the modem from its LAN side. MAC addresses are only used (and thus known) within same broadcast domain and modem has two - LAN (where RB resides) and WAN (facing your ISP).
BR,
Metod

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