HP VAN SDN Controller Administrator Guide

80
C Troubleshooting
INCONSISTENT Application State
Problem Description
“INCONSISTENT” appears in the State field for the selected application in the “Applications”
GUI. Some aspect of the selected application could not be started, but other aspects are
operating as designed.
Remedy
Examine the controller log file for entries regarding the selected application. Also inspect what is
occurring in the OSGi runtime environment for the application.
Path Diagnostic application via REST command
line API
This section describes a method tor troubleshooting switch connectivity issues in OpenFlow switch
environments. This includes two components:
 A packet generator to send test packets of supported protocols via the controller from one
end node to another across an OpenFlow domain
 A path analyzer providing generated test packet information to help determine which path
the test packets take, and helps in identifying the point of failure; that is, the switch that is
not forwarding the traffic as expected on the path.
The procedures in this section can be done using Use a REST-based tool such as RSdoc.
Symptoms
Unable to reach a specific end host for a particular type of service; that is, the end hosts cannot
communicate with each other using a particular traffic flow. For example, a user is unable use
the FTP services hosted by particular server.
Troubleshooting steps
Packet Generator Process
1. Collect the source and destination end host configuration details.
2. Register a packet that will be injected into the network for tracing the path.
3. Set an observation post on the switch where the destined end host is connected.
4. Inject the registered packet onto the network.
5. Query the observation post in step 3.
6. If the observation post has not received the registered packet, set an observation post on the switch
that is next-hop from the source switch.