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This chapter contains the following sections:
Cisco XNC includes a variety of tools that you can use to troubleshoot your network connections. From the Troubleshoot tab, you can do the following:
Step 1 | In the Cisco XNC menu bar, click the Troubleshoot tab. |
Step 2 | Click the
Flow Check tab and select a node from the
Select a node drop-down list.
The node is displayed, with the numberInconsistent Controller Flows and Inconsistent Node Flows, if any, next to each type. |
Step 3 | Click either the Inconsistent Controller Flows or Inconsistent Node Flows to view details for any inconsistent flows. Details are displayed in the Statistics tab. |
Fix inconsistent controller flows or inconsistent node flows.
In order to view and save inconsistent controller or inconsistent node flow details for reference, you can export them to a comma-delimited file.
Step 1 | In the Cisco XNC menu bar, click the Troubleshoot tab. |
Step 2 | Click the
Flow Check tab, and select a node from the
Select a node drop-down list.
The node is displayed, with the numberInconsistent Controller Flows and Inconsistent Node Flows next to each type. |
Step 3 | Click either
Inconsistent Controller Flows or
Inconsistent Node Flows.
The list of Inconsistent Controller Flows or Inconsistent Node Flows is displayed in the Statistics tab. |
Step 4 | Click the checkbox next to one or more inconsistent flows, or click the checkbox at the top of the list to choose all flows in the list. |
Step 5 | ClickExport All. |
Step 6 | In the confirmation dialog box, click Export Flow Details. |
Step 7 | Save the inconsistent flow detail information as a .csv file. |
Note | When you fix an inconsistent controller flow, the flow is installed on the switch. When you fix an inconsistent node flow, the flow is removed from the switch, because the controller is the authoritative source of flow information. |
Step 1 | In the Cisco XNC menu bar, click the Troubleshoot tab. |
Step 2 | Click the
Flow Check tab, and select a node from the
Select a node drop-down list.
The node is displayed, with the numberInconsistent Controller Flows and Inconsistent Node Flows next to each type. |
Step 3 | Click either
Inconsistent Controller Flows or
Inconsistent Node Flows.
The list of Inconsistent Controller Flows or Inconsistent Node Flows is displayed in the Statistics tab. |
Step 4 | Click the checkbox next to one or more inconsistent flows, or click the checkbox at the top of the list to choose all flows in the list. |
Step 5 | Click Fix Inconsistent Flows. |
Step 6 | In the confirmation dialog box, click Fix Inconsistent Flows. The Flow Check tab redisplays Inconsistent Controller Flows and Inconsistent Node Flows with the updated number of each type. If you select all inconsistent flows in Step 4, the number displayed is 0. |
The Policy Analyzer allows you to view detailed information about TIF policies. You can use the Policy Analyzer to perform the following tasks:
Step 1 | On the Cisco XNC menu bar, click Troubleshoot. |
Step 2 | In the
Policies tab, choose the TIF policy that you want to
analyze.
Enter a value in the Search combo box and click the search icon to limit the number of entries that appear. |
Step 3 | To monitor the TIF policy flows, perform the following tasks: |
Step 4 | To run an SDN trace on a TIF policy flow, perform the following tasks: |
Step 5 | Click SDN Trace Status to view the information from the last SDN trace that was run. |
Step 6 | Click Policy Statistics to view statistics for the selected TIF policy. |
The SDN Analyzer downloads packet capture (pcap) files for the interface that you select. The individual pcap files are consolidated into one zip file.
By default, the SDN Analyzer captures 5 pcap files with 100 MB of network data each. If more than the set amount of data is captured, the earlier data is overwritten. You can change the amount of data collected in the config.ini file.
The SDN Analyzer captures packets that come to Cisco XNC and outputs the results to a zip file. The location of the zip file depends upon your browser settings.
You must have root privileges on the server that is running Cisco XNC to run the SDN Analyzer.
Step 1 | Navigate to the xnc/configuration directory that was created when you installed the software. |
Step 2 | Use any text editor to open the config.ini file. |
Step 3 | Locate the following parameters: |
Step 4 | Change the files as appropriate. We recommend using a file size of no more than 100 MG, and increasing the number of pcap files. |
Step 5 | Save the file and exit the editor. |
Step 6 | Restart Cisco XNC. |