I am currently running an old Cisco 7513 unit and just yesterday, we are having problems telnetting into it.
Upon consoling into it, it appears all the vty lines are occupied from outside sources and did not time out.
I tried doing a 'clear line' command on all of them but they just won't kill the sessions.
I cannot reboot the machine yet, as it is running critical traffic but is there a workaround for this?
Due to this problem we are unable to telnet into the router and that can cause serious problems in the long run.