Some of my cisco devices I am not able to clear idle vty lines. if I give clear line it is asking for confirmation but those lines are not getting cleared.TCP keepalive services are aliready enabled
tcp
2611# show tcp briefide
TCB Local Address Foreign Address (state)spa
81FC42B0 10.0.0.15.23 161.108.216.38.1660 ESTABci
2611#clear tcp tcb 81FC42B0get