HP Network Direr Software Products manual Topology Section

146CHAPTER 4: DISCOVERING THE NETWORK

3Com Network Director was unable to obtain information from the following NBX devices

This is likely to occur if incorrect usernames or passwords were provided in the wizard. Note that even if you specified in the wizard that you do not have an NBX voice system, if 3Com Network Director detects an NCP device during the discovery process it will attempt to retrieve phone information from it.

3Com Network Director was unable to read the information from the following NBX devices

This is due to the fact that 3Com Network Director does not support the version of software running on the NBX unit. A service pack may be available for 3Com Network Director on the 3Com web site that supports this version.

Topology Section

The potential issues that may be detected and reported in the discovering links phase of discovery are listed below, along with their potential causes.

The following devices stopped responding while 3Com Network

Director attempted to read topology information from them

This can actually occur at various points of the discovery process, including the sizing stage of detecting devices phase, but the error is only logged once for each faulty device. The device(s) must have responded at some point for this error to be logged. If the problem appears to occur multiple times on a specific subnet, try increasing the timeout/retry values for that subnet in the Network Discovery wizard. Alternatively you can increase them globally using the Tools > Options dialog box.

The following devices returned invalid port information

As part of sizing, 3Com Network Director attempts to determine which ports are enabled and have a link present since it is only those that can take an active role in the topology. For third party devices it attempts to do this using standard MIBs. However, not all devices implement these MIBs and some implement slight variations of them. This can result in 3Com Network Director not being able to establish the ports that are used in topology. Consequently such devices are treated as end stations by the topology process. Older agent versions of certain 3Com devices may also exhibit this problem, in which case there may be additional messages in this report indicating that the agent version is not supported.