This video takes a look at the Cisco DNA Center interface. Follow along and discover how to use the health monitoring interface.
- [Instructor] We're going to start our look at Cisco's DNA Center now. DNA Center is one of the new topics that has been added into the CCMP curriculum and the good news about this is Cisco has provided a DNA Center sandbox for students to use when preparing for their exams. At the time of this recording, you can access that by going to sandboxdnac2.cisco.com and logging in with the default credentials which are devnetuser in all lowercase and the password Cisco123! with a capital C. Now, these URLs do change from time to time as Cisco stands up new sandbox labs and reorganizes things. So, if you don't see the sandbox at this address, you can always go to devnetsandbox.cisco.com to see all of the available sandbox labs. Here, we can see that DNA Center has an always on version. This is the most current version, 22.214.171.124 and clicking on the always on button means that you don't have to reserve this particular sandbox, there are some sandboxes such as the Cisco BroadWork sandbox that requires you to make a reservation. This DNA Center sandbox is what they call always on, meaning you can jump on there at any time without reserving a time slot. Here, I've already logged into the sandbox for Cisco DNA Center. So, let's take a look at the first consideration which is network and device health monitoring. Now, let me say that the scope of things you can do within Cisco DNA Center is very broad, much more so than the scope of the NRC exam. So, we're focusing here on troubleshooting common network problems by using DNA Center and that's what the NRC exam objectives that Cisco provides to us, that's what it points out that we should be familiar with. So, the general section in DNA Center that you'll be working from for troubleshooting is the assurance component. Cisco DNA Center assurance leverages machine learning to try and predict problems through proactive monitoring and it also provides real time insights into applications, network services and clients. So, this is going to be your main area of focus when you're troubleshooting with Cisco DNA Center. We can see that along the top menu, the last option to the right is the assurance tab. So, let's click that and the first page we're brought to is the overall health page. This gives us an overview of the health status for everything that's visible to DNA center in our network, both clients and the network itself. On the left, we have our network devices area and on the right, are our clients themselves, in this case our wired clients. At the bottom, we can see there's a list of top 10 issue types, we see that here. Of course, with this being a sandbox environment, sometimes there are issues here and other times there are not. In this particular case, there are no issues here. So, that's where would find lists of your issues if there were any in place though. Not only would it have issues there, but also you would find suggested remediation steps. In other words, what do we need to do to correct the issues that are listed? This would also have metrics such as the number of occurrences, the timestamp, client and device information and so on. Just underneath the network devices area that we see here, let's click the view network health button. This gives us a snapshot of our overall network health with 100%, of course, being the goal. Currently, we can see that there are a total of 14 devices here and we can see a breakdown of that on the right. We can see distribution devices, access devices, wireless controller and access points. If we click on any of these, let's just click on wireless controller as an example. You can see a more detailed information view that's specific to this device. We can see things like memory utilization and buffer and a free timer score here as well and of course, we see that this is in good health. If we click on this health chart itself, we can see a summary of performance displayed just below that. We can see the device type listed here. We can even see the device model and the device OS. We can see that this is a Cisco 3504 wireless LAN controller. Again, we see the model number here under the device model and if we go under the OS, we can see the version of the OS that's running on this device. At the very bottom if we scroll down, we're even told the IP address for this wireless LAN controller, 10.10.20.51. We can also see again the overall health of that. If we hover over that, we have lots more metrics available to us and we can see a location on the far right. It tells us it's on floor 17 of our building. So, great great troubleshooting information. If we go back to our main network health page and if we scroll to the bottom, we'll see a detailed list of all of our network devices found here. And we see lots of metrics such as the OS version, we see the IP address and so on. If we click the assurance tab again, just to take us back to the main overall health view, let's also click the view client's health button under our wired clients and this is going to show us individual health stats for wired and wireless clients. We see those broken down here. Wireless clients on the left and wired clients on the right. If we click the view details button under either one of these sections, let's just go ahead and do that for our wireless clients, this is going to show us individual stats for all of the clients connected to the wireless network. We can see the number of clients that are considered to have fair connectivity and those that are considered to have good connectivity. If we click on either one of these sections in this chart, so for example, let's click on fair connectivity and you see that below that it will actually load a list of all of those clients. We can see this client list has information specific to each device. So, we see the device type, IP address, the health, the time that it was last seen, the name of the AP and the SSID to which it is associated among other things. So, of course you can also use the filter option if you want to click that. If you're trying to troubleshoot a very specific device or specific host, you can filter by the host name, Mac address, IP address or user ID if you want to see information only about a certain device. Let's close that out and let's go back to our main client's health page that we see here and now let's click the blue view details button under our wired clients on the right. This gives us a similar view as that we saw for our wireless clients. We have a chart of the client health at the top and we can click on that to load a client list down at the bottom. So overall fairly intuitive navigation and lots of really great detailed information to be found here in regard to network and clients' health. We can of course drill down even further by clicking on any of the clients that are found in this list. So, let's just click on one of our wired clients and if we do that, you notice in the background something called client 360 loads. So, let's close this overlay tab, so that we can see a little bit more information about that. And from here we see specific health information about this wired client that we've chosen. We can see the IP address, we can see the VLAN ID of 823, we can see the status and lots of other things and in the middle, we'll be able to see any current issues that are going on on this device. So, this one doesn't have any, but if there were current issues in place, we would have a list of that here. Notice on the right, we could also click and view resolved issues or any issues that had been ignored as well. So, that's a look at network and device health monitoring in Cisco DNA Center.
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- Device management troubleshooting
- Troubleshooting SNMP, SNMP v2c, and SNMPv3
- Debugging output
- DHCP troubleshooting
- IP SLA troubleshooting
- NetFlow troubleshooting
- Network monitoring
- Exam prep tips