How to enable Telnet in Cisco and brocade.

A)    Enabling telnet in cisco

Go to router R1 console and configure telnet with “line vty” command.

R1>enable 
R1#configure terminal 
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#line vty 0 
R1(config-line)#password Pass123
R1(config-line)#login 
R1(config-line)#logging synchronous 
R1(config-line)#exec-timeout 40
R1(config-line)#motd-banner 
R1(config-line)#exit 
R1(config)#

The “line vty” command enable the telnet and the “0″ is just let a single line or session to the router. If you need more session simultaneously, you must type “line vty 0 10“.

The “password” command set the “Pass123” as password for telnet. You can set your own password.

The “login” command authenticate and ask you the password of telnet. If you type “no login” command, the telnet never authenticate for password which is not a good practice in real network environment.

The “logging synchronous” command stops any message output from splitting your typing.

The “exec-timeout” command just sets the time-out limit on the line from the default to “40″ minutes.

The motd-banner forces a banner message to appear when logging in.

OK, the Telnet services enabled successfully. But you must set the enable password for router in order to control it remotely.

R1(config)#enable password Password
R1(config)#exit

B.   Enabling Telnet in Brocade switch

Telnet access is disabled by default. You can use a Telnet client to access the CLI on the device over the network.

To enable Telnet operation, enter the following command.

device(config)# telnet server

If you do not plan to use the CLI over the network and want to disable Telnet access to prevent others from establishing CLI sessions with the device , enter

the following command.

device(config)# no telnet server

to save the configuration run command

device(config)# wr me

then exit from the device using exit command.