Setting up reverse telnet for 1900 witch access

bgriffis · ‎07-07-2005

Hey all - I set up a lab to mess around with at home. The switch is an ancient dinosaur, but still it gives me something to mess with.

Does the 1900 xswitch support a reverse telnet port? Anything I need to be aware of in configuring the line? I can telnet to the management port on the switch. I can attach a console cable and connect to the console port. I tried setting up a 2509 router with an Octal cable for access. It works for reverse telnet to my other Cisco routers, but I get "% Connection refused by remote host" when I try reverse telnet to the switch.

Help!

Georg Pauwen · ‎07-07-2005

Hello,

I assume that you have verified the settings for the port on the 1900 (9600/8/n/1) ?

Try to find the line where the 1900 is conected to with the ´show line´ exec command and then manually clear the line with the ´clear line x´ command...

HTH,

GP

bgriffis · ‎07-07-2005

Thanks for the info. I verified the line:

Swi1900-A#sh line

RS-232 configuration:

9600 baud, 8 data bits, 1 stop bits, None parity

Autobaud: Enabled

Modem dialin: Enabled

Idle time-out: 0

Modem Init String:

Silent time: 0

Password Threshold: 3

I know on the routers I needed to configure login. I don't see that option when configuring console on the 1900.

1900 line options:

Swi1900-A(config)#line cons

Swi1900-A(config-line)#?

Line configuration commands:

autobaud Match remote baud-rate

databits Set number of data bits per character

exit Exit from line configuration mode

help Description of the interactive help system

modem Configure the modem control lines

no Negate a command or set its defaults

parity Set terminal parity

password-thresh Configure the maximum password threshold

silent-time Configure the silent time on login intrusion

speed Set transmit and receive speeds

stopbits Set asynch line stop bits

time-out Configure the line idle time-out period

The switch is running pretty ancient IOS. Do you know off-hand if I would need to configure login on the console port, and if that option is available on more recent IOS? I'm running:

Cisco Catalyst 1900/2820 Enterprise Edition Software

Version V9.00.05

Swi1900-A uptime is 1day(s) 08hour(s) 45minute(s) 07second(s)

cisco Catalyst 1900 (486sxl) processor with 2048K/1024K bytes of memory

Hardware board revision is 5

Upgrade Status: No upgrade currently in progress.

Config File Status: No configuration upload/download is in progress

15 Fixed Ethernet/IEEE 802.3 interface(s)

Base Ethernet Address: 00-04-27-A8-3E-80

bgriffis · ‎07-07-2005

And the solution is!

I did not disconnect previous sessions after starting a reverse telnet session. I figured that out by using an unused connection from my 2509. Worked fine. Tried again, wouldn't connect. Moved to a different line. Worked fine for the first session. Wouldn't reconnect.

I forgot to jump back to the 2509 and disconnect the line. Oh well, it's working now. User error.