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This chapter contains the following sections:
Cisco Extensible Network Controller (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 menu bar, choose Troubleshoot, and then click the Flow Check tab. |
Step 2 | From the
Select a
node drop-down list, choose a node.
The node is displayed, with the number of Inconsistent Controller Flows and Inconsistent Node Flows, if any, next to each type. |
Step 3 | Click either 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 menu bar, choose Troubleshoot, and then click the Flow Check tab. |
Step 2 | Choose a node
from the
Select a
node drop-down list.
The node is displayed, with the number of Inconsistent Controller Flows and Inconsistent Node Flows next to each type. |
Step 3 | Choose 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 | Check the check box next to one or more inconsistent flows, or check the check box at the top of the list to choose all flows in the list. |
Step 5 | Click Export All, and then click Export Flow Details. |
Step 6 | Save the inconsistent flow detail information as a .csv file that you can open later for analysis. |
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 menu bar, chooseTroubleshoot, and then click the Flow Check tab. | ||
Step 2 | Choose a node
from the
Select a
node drop-down list.
The node is displayed, with the number of Inconsistent 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 | Check the check box next to one or more inconsistent flows, or check the check box at the top of the list to choose all flows in the list. | ||
Step 5 | Click Fix Inconsistent Flows. | ||
Step 6 | In the
Fix Flows 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.
|
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 menu bar, choose Troubleshoot, and then click the Policies tab. |
Step 2 | 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 | Monitor the TIF policy flows as follows: |
Step 4 | Run an SDN trace on a TIF policy flow as follows: |
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 Extensible Network Controller (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 Extensible Network Controller (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 that you use a file size of no more than 100mb, and increase the number of pcap files. |
Step 5 | Save the file and exit the editor. |
Step 6 | Restart Cisco Extensible Network Controller (XNC). |