Configure on NE80E:
user-interface vty 0 4
acl 2004 inbound
user privilege level 1
idle-timeout 0 20
Telnet users log on the device over 20 seconds and are not forced to exit. The version is
Change telnet authentication as local one and idle-timeout takes effect.
Check NE80E configuration and it is found that telnet users use RADIUS authentication. If Radius server is used, timeout setting is distributed by the server. Local timeout configuration is invalid.