Replace connection **failed ** to user-friendly format.
```
[email protected]:~$ show ipoe-server sessions
Connection to "localhost:2002" failed
[email protected]:~$ show ipoe-server statistics
Connection to "localhost:2002" failed
[email protected]:~$ show l2tp-server sessions
Connection to "localhost:2004" failed
[email protected]:~$ show pppoe-server
Possible completions:
interfaces Show interfaces where pppoe-server listens on
sessions Show active PPPoE server sessions
statistics Show PPPoE server statistics
[email protected]:~$ show pppoe-server interfaces
Connection to "localhost:2001" failed
[email protected]:~$ show pppoe-server sessions
Connection to "localhost:2001" failed
[email protected]:~$
[email protected]:~$ show pptp-server sessions
Connection to "localhost:2003" failed
```