the management station looks at the network from its point of view, so it does not care if your desktop can ping a device. The question is - Does the management station has connectivity to the devices in your network?-
You must ping a device in question local from the mgmt server. you can do this from the Device Center if you are logged in LMS. In the left down corner there is the tools section. Select 'Management Station to Device'.
Often these are routing problems/restrections between the mgmt server and particular router interfaces.
If that is the case there is a perl script available from TAC to exclude these IP addresses to be pinged by DFM.
Thanks for your response and sugestion. I can ping from device center, telnet and all the other things. I ran the script that you pointed me to and got the sucesfull 'unmanaged' response. Then edited the script to re manage them, but still show as unresponsive. I did leave it a few minutes between unmanageing and remanging, but it still shows as unresponsive.
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