Application Telemetry Overview
Application telemetry allows you to configure global network settings on devices for monitoring and assessing their health.
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Application telemetry allows you to configure global network settings on devices for monitoring and assessing their health.
With Catalyst Center, you can configure global network settings when devices are assigned to a specific site. Telemetry polls network devices and collects telemetry data according to the settings in the SNMP server, syslog server, NetFlow Collector, or wired client.
Create a site and assign a device to the site. See Create, Edit and Delete a Site.
Step 1 |
From the top-left corner, click the menu icon and choose Design > Network Settings > Telemetry. |
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Step 2 |
In the SNMP Traps area, do one of the following:
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Step 3 |
In the Syslogs area, do one of the following:
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Step 4 |
In the Application Visibility area, check the Enable by default on wired access devices check box to enable Application Telemetry and Controller-Based Application Recognition (CBAR) by default upon the network device site assignment. Do one of the following:
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Step 5 |
In the Wired Endpoint Data Collection area, click the Enable Catalyst Center Wired Endpoint Data Collection At This Site radio button to turn on IP Device Tracking (IPDT) on the access devices of the site. If you don't want to enable IPDT for the site, click the Disable Catalyst Center Wired Endpoint Data Collection At This Site radio button (the default).
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Step 6 |
In the Wireless Controller, Access Point and Wireless Clients Health area, check the Enable Wireless Telemetry check box to monitor the health of the wireless controllers, APs, and wireless clients in your network. |
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Step 7 |
Click Save. |
Catalyst Center automatically enables application telemetry on all applicable interfaces or WLANs that are selected based on the new automatic interfaces or WLAN selection algorithm.
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The following table provides the criteria for selecting interfaces and WLANs based on the conventional tagging-based algorithm (with lan keyword) and the new automatic selection algorithm for all the supported platforms:
Platform | Conventional Tagging-Based Algorithm | Automatic Selection Algorithm | ||
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Router |
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Switch |
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Cisco AireOS Controller |
WLAN profile name is tagged with the lan keyword.1, 2 |
If the SSIDs are mixed, that is Local mode, Flex mode, and Fabric mode, Wireless Service Assurance (WSA) processing is enabled. If all the SSIDs are in Local mode, NetFlow is enabled. |
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Cisco Catalyst 9800 Series Wireless Controller with Optimized Application Performance Monitoring (APM) profile and IOS 16.12.1 and later. |
WLAN profile name is tagged with the lan keyword.1, 2 |
If the SSIDs are mixed—that is, central switching, Flex mode, and Fabric mode—the Cisco Application Visibility and Control (AVC) basic record is configured. If all the SSIDs use central switching, the Optimized APM record is configured. For Cisco Catalyst 9800 Series Wireless Controllers with IOS 17.10 and later, Catalyst Center pushes the APM profile, not the AVC basic profile, for flex and fabric SSIDs. |
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Catalyst Center Traffic Telemetry Appliance with Optimized APM profile and IOS 17.3 and later. |
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Configure global telemetry settings as described in Configure Syslog, SNMP Traps, NetFlow Collector Servers, and Wired Client Data Collection Using Telemetry.
Step 1 |
From the top-left corner, click the menu icon and choose . The Inventory window displays the device information gathered during the discovery process. To view devices available in a particular site, expand the Global site in the left pane and select the site, building, or floor. |
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Step 2 |
Choose the devices that you want to provision. |
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Step 3 |
From the Actions drop-down list, choose Telemetry and do one of the following:
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Step 4 |
Click Apply. The Application Telemetry column shows the telemetry configuration status. If you don’t see the Application Telemetry column in the default column setting, click the ellipsis icon () at the right end of the column headings and check the Application Telemetry check box. |
You can enable application telemetry for new and existing devices.
Note |
You can also enable Application Telemetry from the Application Visibility window. For more information, see Enable/Disable Application Telemetry. |
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Before enabling application telemetry in Catalyst Center, ensure to delete any existing flow monitors configured manually from through the Cisco Catalyst 9800 Series Wireless Controller GUI. |
Step 1 |
From the top-left corner, click the menu icon and choose . |
Step 2 |
To view devices available in a particular site, expand the Global site in the left pane, and choose the site, building, or floor. |
Step 3 |
In the Inventory window, choose the device. You can choose multiple devices at a time. |
Step 4 |
From the Action drop-down list, choose Telemetry > Enable Application Telemetry. |
Step 5 |
In the Enable Telemetry slide-in pane, complete the following settings: |
Step 6 |
Click Enable. |
Step 7 |
In the Application Telemetry window, click ok. To skip this screen in the future, check Don't show again. |
If you are using the Catalyst Center application telemetry to monitor device data, and you need to change the Catalyst Center cluster virtual IP address (VIP), complete the following steps to change the VIP and to ensure that node telemetry data is sent to the new VIP.
Determine the version of Catalyst Center that you are using. You can check this by logging in to the Catalyst Center GUI and using the About option to view the Catalyst Center version number.
Obtain SSH client software.
Identify the VIP address that was configured for the 10-GB interface facing the enterprise network on the Catalyst Center primary node. Log in to the appliance using this address, on port 2222. To identify this port, see the rear-panel figure in the "Front and Rear Panels" section in the Cisco Catalyst Center Installation Guide.
Obtain the Linux username (maglev) and password configured on the primary node.
Identify the cluster VIP that you want to assign. The cluster VIP must conform to the requirements explained in the "Required IP Addresses and Subnets" section in the Cisco Catalyst Center Installation Guide.
Step 1 |
Access the Catalyst Center GUI and disable Application Telemetry at all the sites, as follows: |
Step 2 |
Use the appliance Configuration wizard to change the cluster VIP, as follows: |
Step 3 |
Restart the necessary Catalyst Center services by entering the following series of commands at the SSH prompt:
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Step 4 |
Wait for all the services to restart. You can monitor the progress of the restarts by entering the following command, substituting service names as needed for the release train appropriate for your Catalyst Center version.
When all the necessary services are running, you see command output similar to the following, with a Running status for each service that has restarted successfully:
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Step 5 |
Access the Catalyst Center GUI and Enable Application Telemetry to all nodes as follows:
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You can push configuration changes to a device regardless of whether device controllability is enabled or disabled.
Step 1 |
From the top-left corner, click the menu icon and choose . The Inventory window displays the device information gathered during the discovery process. To view devices available in a particular site, expand the Global site in the left pane, and select the site, building, or floor. |
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Step 2 |
Choose the devices on which you want to update the configuration changes. |
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Step 3 |
From the Actions drop-down list, choose . The Update Telemetry Settings slide-in pane opens. |
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Step 4 |
(Optional) Check the Force Configuration Push check box to push the configuration changes to the device. If there is no change in the configuration settings, the existing configuration is pushed again to the device. |
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Step 5 |
Click Next. |
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Step 6 |
In the Update Telemetry Settings slide-in pane, depending on the Visibility and Control of Configurations settings, choose an available option:
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Step 7 |
In the Task Name field, enter a task name. |
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Step 8 |
Do the following:
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Step 9 |
On the Performing Initial Checks window, address the following issues to continue with your current deployment:
For more information, see Network Provisioning Prechecks. If you chose Now or Later, click Submit, and the device configurations will deploy at the scheduled time. You can view the task on the Tasks window. |
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Step 10 |
If you chose Generate configuration preview, in the Preview Configuration window, depending on the Visibility and Control of Configurations settings, do the following:
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