https://community.extremenetworks.com/t5/extremewireless-general/unable-to-connect-to-xmc-8-1-with-java-concoles/m-p/39990#M2382 Hello, team,<BR /> <BR /> I've done a clean install of XMC, PV and NAC - everyting version 8.1 - under ESXi. XMC, PV, NAC and client computers are in the same VLAN. There are no firewalls between them. Everything is sinchronyzed with single NTP. All DNS recored were created. I can ping NAC from XMC and vice versa. <BR /> <BR /> I've added to XMC PV and NAC - they both are green.<BR /> <BR /> The problem is I can't connect with Java-consoles to XMC. "Unable to connect to management server". Nothing in XMC's log, the same in NAC's. I've turned it to verbose.<BR /> <BR /> What most likely could be the problem? I hope this is 8.1 version specific issue...<BR /> <BR /> Please, help!<BR /> <BR /> Ilya<BR /> <BR /> Thu, 07 Jun 2018 21:42:00 GMT Ilya_Semenov 2018-06-07T21:42:00Z https://community.extremenetworks.com/t5/extremewireless-general/unable-to-connect-to-xmc-8-1-with-java-concoles/m-p/39990#M2382 Hello, team,<BR /> <BR /> I've done a clean install of XMC, PV and NAC - everyting version 8.1 - under ESXi. XMC, PV, NAC and client computers are in the same VLAN. There are no firewalls between them. Everything is sinchronyzed with single NTP. All DNS recored were created. I can ping NAC from XMC and vice versa. <BR /> <BR /> I've added to XMC PV and NAC - they both are green.<BR /> <BR /> The problem is I can't connect with Java-consoles to XMC. "Unable to connect to management server". Nothing in XMC's log, the same in NAC's. I've turned it to verbose.<BR /> <BR /> What most likely could be the problem? I hope this is 8.1 version specific issue...<BR /> <BR /> Please, help!<BR /> <BR /> Ilya<BR /> <BR /> Thu, 07 Jun 2018 21:42:00 GMT https://community.extremenetworks.com/t5/extremewireless-general/unable-to-connect-to-xmc-8-1-with-java-concoles/m-p/39990#M2382 Ilya_Semenov 2018-06-07T21:42:00Z https://community.extremenetworks.com/t5/extremewireless-general/unable-to-connect-to-xmc-8-1-with-java-concoles/m-p/39991#M2383 Is your Java up to date? I seem to remember all my Java consoles failing following an XMC upgrade, and it was an update to my Java that fixed it. Thu, 07 Jun 2018 21:53:00 GMT https://community.extremenetworks.com/t5/extremewireless-general/unable-to-connect-to-xmc-8-1-with-java-concoles/m-p/39991#M2383 Steve_Ballantyn 2018-06-07T21:53:00Z https://community.extremenetworks.com/t5/extremewireless-general/unable-to-connect-to-xmc-8-1-with-java-concoles/m-p/39992#M2384 It's 10th Java. The latest. Thu, 07 Jun 2018 21:53:00 GMT https://community.extremenetworks.com/t5/extremewireless-general/unable-to-connect-to-xmc-8-1-with-java-concoles/m-p/39992#M2384 Ilya_Semenov 2018-06-07T21:53:00Z https://community.extremenetworks.com/t5/extremewireless-general/unable-to-connect-to-xmc-8-1-with-java-concoles/m-p/39994#M2386 Hello Ilya,<BR /> <BR /> maybe this article helps:<BR /> <BR /> <A href="https://gtacknowledge.extremenetworks.com/articles/Solution/Java-client-does-not-launch-application-after-upgrading-Extreme-Management-Center-Netsight-to-version/?l=en_US&amp;#38;fs=RelatedArticle" target="_blank" rel="nofollow noreferrer noopener">https://gtacknowledge.extremenetworks.com/articles/Solution/Java-client-does-not-launch-application-...</A><BR /> <BR /> Fri, 08 Jun 2018 00:13:00 GMT https://community.extremenetworks.com/t5/extremewireless-general/unable-to-connect-to-xmc-8-1-with-java-concoles/m-p/39994#M2386 StephanH 2018-06-08T00:13:00Z