topic Re:radius and dot1x in Network Access Control https://community.cisco.com/t5/network-access-control/radius-and-dot1x/m-p/2017960#M163627 <HTML><HEAD></HEAD><BODY><P>The radius server is only detected dead when it doesn't respond to a radius request based on its dead criteria.</P><P></P><P>Please look up the dead criteria using the software configuration guide for your switch.</P><P></P><P>Active clients will not suffer connectivity issues when the radius server goes down. Only client requesting authentication will experience some latency but that is based on the radius dead criteria.</P><P></P><P>Hope that helps</P><P></P><P>Sent from Cisco Technical Support Android App</P></BODY></HTML> Wed, 26 Sep 2012 13:01:18 GMT Tarik Admani 2012-09-26T13:01:18Z radius and dot1x https://community.cisco.com/t5/network-access-control/radius-and-dot1x/m-p/2017959#M163599 <P>We are deploying dot1x in our network.</P><P>We have deployed 2 ISE policy service nodes. I am seeing a behavior in which switch is not detecting radius server becoming unreachable/reachable quick enough. It detects that radius server is down, but after much delay.</P><P>How can I make sure that the radius server down/up events are detected quickly?</P><P>We also have something in mind where when the switch detects that radius server has become unreachable, all the dot1x configurd ports will be force-authorized. </P><P>Now during the time when the radius-server went down and when the ports became force-authorized, will the clients suffer any loss of connectivity?</P> Mon, 11 Mar 2019 02:35:34 GMT https://community.cisco.com/t5/network-access-control/radius-and-dot1x/m-p/2017959#M163599 Kashish_Patel 2019-03-11T02:35:34Z Re:radius and dot1x https://community.cisco.com/t5/network-access-control/radius-and-dot1x/m-p/2017960#M163627 <HTML><HEAD></HEAD><BODY><P>The radius server is only detected dead when it doesn't respond to a radius request based on its dead criteria.</P><P></P><P>Please look up the dead criteria using the software configuration guide for your switch.</P><P></P><P>Active clients will not suffer connectivity issues when the radius server goes down. Only client requesting authentication will experience some latency but that is based on the radius dead criteria.</P><P></P><P>Hope that helps</P><P></P><P>Sent from Cisco Technical Support Android App</P></BODY></HTML> Wed, 26 Sep 2012 13:01:18 GMT https://community.cisco.com/t5/network-access-control/radius-and-dot1x/m-p/2017960#M163627 Tarik Admani 2012-09-26T13:01:18Z