We have cisco sg550xg switch where we first saw how to configure cisco via GUI, and long story short we got stuck on radius. From what we found on manuals we add a new radius client with server ip address, auth port and account port as well as well adding the RADIUS under selected methods in management access authentication. However when I try to login via telnet i got "authentication failed" and this log

Warning %AAA-W-REJECT: New telnet connection, source destination REJECTED

We have tested the radius server with already configured cisco 2950 and it was working fine. The IOS that we are using is tesla_hybrid_2.3.5.63.

Am I missing something? Can someone paste a working configuration?

Thank you in advance

  • Did you configure the RADIUS server to allow the Cisco switch to use it for authentication? Nov 20, 2017 at 21:36
  • I have enable the radius server once but i'm not sure that i'm doing it right. From what i can see in the GUI I can enable the radius server and put the atuh and accou port, enter server key where I think i put my secret from the radius, create group and create user for that group. I can't get the logic of this. Nov 20, 2017 at 21:42
  • No, I mean go to the actual server that is handling the RADIUS authentication and configure that. Not on the switch. The switch should have an IP address in the RADIUS config for the RADIUS server. What device has that IP address? Have you configured that other device? Nov 20, 2017 at 21:45
  • 1
    The radius server is configured correctly, we have tested by putting the ip address of the cisco 550 on other already configured cisco 2950 and it was working fine. The ip address on the switch is put on vlan 250. Nov 20, 2017 at 21:51
  • 1
    tesla hybrid Nov 20, 2017 at 21:54


You must log in to answer this question.

Browse other questions tagged .