Calculating MX WAN MAC Addresses
Overview
Cisco Meraki MX and Z-Series Security devices are physically labeled with a base MAC address that may differ from the observed MAC address of the actual interface. To obtain the actual MAC address of an interface, a packet capture is typically required. To save time, the MAC address of currently supported MX and Z-Series devices can be calculated using this article.
Locating the Base MAC Address of Cisco Meraki Devices
Overview
A MAC address is a unique hardware address that is useful for identifying a device. You can find Cisco Meraki MAC addresses using several methods.
This article explains 3 ways to locate the MAC address of a Cisco Meraki device: physical inspection, the dashboard device page, and the device's local status page.
Prerequisites
-
A Cisco Meraki device (for example, an MR, MS, or MX).
-
Access to the Cisco Meraki Dashboard with appropriate permissions to view the device, if you plan to use the Dashboard method.
-
Network access to the device's local status page, if you plan to use that method.
Step-by-step instructions
Physical inspection of the device
Find the MAC address by physically locating the device information sticker on the device. An example of the information sticker on an MR16 access point is shown below:
Dashboard device page
You can also find the MAC address in the dashboard if the device has successfully checked into dashboard. The following image shows the MAC address on an MR33 access point listed in dashboard:
Device local status page
You can also find the MAC address by accessing the device's local status page. Refer to Local Status Page documentation for more information on accessing the local status page.
Troubleshooting
Meraki WAN appliances and switches configured in warm spare also use virtual MAC addresses. The MAC address shown by the methods above may differ from the virtual MAC used by the HA (High availability) pair.
For more information on virtual MAC addresses for HA pair WAN appliances, refer to the Virtual MAC Addresses documentation.
For more information on virtual MAC addresses for switches in warm spare, refer to the How Warm Spare Works documentation.
Example Calculation
MAC addresses for Cisco Meraki MX and Z-series devices can be calculated by taking the last digit of the MAC, represented as "X" in the table, and adding the offset count noted for the device.
Given the MAC address AA:BB:CC:06:25:E8 we will calculate the MAC for the WAN 1 interface of a MX64.
Checking the table, a plus 5 hexadecimal offset is indicated for the MX64.
The resulting MAC address is AA:BB:CC:06:25:ED as we are counting in hexadecimal.
For this example, this can be visually represented by the following formula:
0xE8 + 5 = 0xED
Offset Table
Note: Cisco Meraki MX and Z-Series Security devices Operating in Passthrough mode will use the Base MAC Address for their WAN interface.
The following table lists the MAC offset of the interfaces for currently supported MX and Z-series devices below.
The MX75/85/95/105 support a third WAN (backup uplink) starting in MX 18.208 firmware. Refer to the MultiWAN Backup Uplink document for details.
MX
|
Model |
WAN 1 Offset |
WAN 2 Offset |
WAN 3 Offset |
|
MX60 |
X+5 |
X+4 |
N/A |
|
MX60W |
X+5 |
X+4 |
N/A |
|
MX64 |
X+5 |
X+4 |
N/A |
|
MX64W |
X+5 |
X+4 |
N/A |
|
MX65 |
X+1 |
X+2 |
N/A |
|
MX65W |
X+1 |
X+2 |
N/A |
|
MX67 |
X+1 |
X+2 |
N/A |
|
MX67W |
X+1 |
X+2 |
N/A |
|
MX67C |
X+1 |
X+2 |
N/A |
|
MX68 |
X+1 |
X+2 |
N/A |
|
MX68W |
X+1 |
X+2 |
N/A |
|
MX68CW |
X+1 |
X+2 |
N/A |
| MX75 | X+1 | X+2 | X+3 |
|
MX80 |
X+1 |
X+2 |
N/A |
|
MX84 |
X+1 |
X+2 |
N/A |
| MX85 | X+1 | X+2 | X+4 |
|
MX90 |
X+1 |
X+2 |
N/A |
| MX95 | X+1 | X+2 | X+4 |
|
MX100 |
X+1 |
X+2 |
N/A |
| MX105 | X+1 | X+2 | X+4 |
|
MX250 |
X+1 |
X+2 |
N/A |
|
MX400 |
X+2 |
X+4 |
N/A |
|
MX450 |
X+1 |
X+2 |
N/A |
|
MX600 |
X+2 |
X+4 |
N/A |
Z-Series
|
Models |
Offset |
|
Z1 |
X+5 |
|
Z3/C |
X+1 |
|
Z4/C |
X+1 |