There are three different ways for Meraki devices to identify clients: Unique client identifier, Track by MAC, and Track by IP. These tracking methods are how key information like the clients list and network usage data is populated in the dashboard.
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This article outlines how to change client tracking in the dashboard, the differences between the three options, and the best use cases for each in different topologies.
Note: Only the MX Security Appliance has the option to use Unique Client Identifier or track clients by IP. All other Cisco Meraki devices will only distinguish clients based on MAC addresses.
Configuring Client Tracking
The following instructions outline how to change the client tracking method:
Changing the client tracking method willreset your historical client usage statistics.
Client Tracking Option Use Cases
The best tracking method to use depends on whether any layer 3 devices are routing between the security appliance and your end clients, which introduces multiple broadcast domains. The recommendations are detailed below.
Unique Client Identifier
Unique client identifier is a Meraki technology that leverages network topology and device information to uniquely identify and track clients. It uses an algorithm that intelligently correlates client MAC and IP addresses seen across the Meraki stack, allowing the security appliance to generate a unique identifier for each client in a combined network with other Meraki devices. System maintenance software for mac. This is specifically useful when there are Meraki MS switches routing layer 3 between end clients and the security appliance, which segregates broadcast traffic containing the client's MAC address.
This method should be used only if the network has downstream layer 3 routing devices that are all Meraki devices. In this deployment scenario, tracking by IP would otherwise require the security appliance to be split into a separate dashboard network, as tracking by IP is not supported in combined networks. Tracking by MAC would fail to identify end client devices due to the layer 3 boundary, associating downstream client traffic to the routing switch and negatively affecting network usage numbers in dashboard.
Note: Unique client identifier does not allow the MX to identify clients connected to an SSID utilizing NAT mode with Meraki DHCP, even for MRs in the same dashboard network.
Note: Some tools, such as client connectivity alerts and client ping, are based on ARP and will not be available when using Unique client identifier.
Requirements and Conditions
Please review the requirements and conditions below before enabling this feature on your network.
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To see the Unique Client Identifier option in Addressing & VLANs, the following conditions must be met:
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Note: If you are currently tracking by IP, you will need to temporarily change it to track by MAC in order to combine the network. Once the network is combined, you should see the option for the ‘Unique Client Identifier’ under ‘Addressing and VLANs’ on your MX.
Changing the client tracking method willreset your client usage statistics.
Note that switching from Unique Client Identifier to Track by IP or Track by MAC may take up to 30 days for client tracking information to update on active devices, which may result in duplicate entries with different client details. Switching from Track by IP or Track by MAC to Unique Client Identifier should update within 24 hours for active devices. Inactive devices may take up to 30 days to age out for all tracking options.
Track by MAC
In many deployments, the MX security appliance is used as the gateway for the network and performs inter-VLAN routing for the network if necessary. In this circumstance, the MX is in the same broadcast domain as all clients in the network, so the client's MAC address will be found in all traffic seen by the MX.
The following diagram outlines how the MX can see client MAC addresses in this topology:
Track by IP
Note: Track by IP is not supported in combined dashboard networks. To combine an MX network that is tracking clients by IP, switch it first to track by MAC address or Unique Client Identifier before proceeding.
Note: Similar to Track by Unique client identifier, some tools, such as client connectivity alerts and client ping, are based on ARP and will not be available when using Track by IP.
This option is best used in the two case scenarios:
First is in split networks, where all layer three devices are Meraki devices but they are in separate dashboard networks.
Second, in cases where there is a non-Meraki layer 3 switch performing inter-VLAN routing downstream of the MX. If you are using Meraki layer 3 switches, enable Unique Client Identifier instead. Since non-Meraki layer 3 devices will modify the source MAC address of client traffic, the MX cannot identify clients by their MAC as shown below.
In order to identify clients downstream of the non-Meraki layer 3 switch, the MX can be changed to track clients by their IP. Since the non-Meraki layer 3 switch won't be modifying the source IP of client traffic, the MX can identify different clients by IP:
When an MX is set to track clients by IP, the client MAC addresses displayed on the clients list may not be accurate.
Additional ResourcesMeraki Mac Software To Track Specs 2017
To summarize: somebody said this is the iOS of firewalls. this is a very accurate statement. I recommend these to small businesses that want some entry level enterprise class features for a decent price. They are easy to setup and 'just work'. To any company that has a decent competent IT staff, I would probably recommend something more robust.
We 'upgraded' from an old ASA5510 to a pair of mx90's. We had recently upgraded our wireless system to Meraki and were very pleased with it. I have to say that I'm not overly impressed with the MX90. The hardware seems fine and only time will tell. They look nice and are VERY easy to setup. That's about where the pros stop.
We were sold a pair as they support hot spare. Not in Nat mode. We now have a cold spare.
We were sold the mx90 to support our 150 users. We cannot hit all 45Mbps of bandwidth we have. After several support instances (support is good) they told us that the CPU was pegged on the unit and we were pushing the unit too hard and should either turn features off or upgrade. Awesome. Sounds like my first (and only) android phone. Firewall rules and nat rules are a pain. One line for each port and each IP (with some exceptions). We more than doubled our Nat and firewall ACL's when moving to the new system. DMZ is created by making special vlans and rules. For a system that is so user friendly, this should just be a button people. Content filtering can track by MAC or IP. What about username.. NOPE. So all you VDI and shared workstation shops.. this is a terrible content filter for you (and us). I have very good records of what each VDI instance did over the last month but no idea who was doing it. The content filter also doesn't work very well. It blocks things but is very easy to get around and very hard to get granular. You can't name a user, you have to create an AD group and assign a policy to that group. Then you have to create all the rules again for that user. Sure you can clone a template but it still is a mess. It also has had a tendency to return a text only version of a page until you refresh. Not a huge issue but try explaining that to 150 different people. They also recommend you use a top sites only list instead of a full list. We had full list turned on but had to put it back to top sites only due to CPU problems. Meraki Mac Address Table![]() Meraki Mac Address+ Read moreComments are closed.
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