Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

CAN NOT TELNET TO ROUTER

I am trying to telnet to a router that is configured with a BRI interface (using Ip Unnumbered Ethernet 0) and Ethernet 0 (exampe of ip: 200.200.200.200). The result when I telnet to 200.200.200.200 is:

Could not open a connection to host: connection failed.

There is no one logged into the router. The router was running IOS 11.*, the same problem exsist, so I upgraded the software to 12.1.7, and problem is still there.

The router functions correctly, it routes just fine, you just can't telnet.

The router is a 3620.

Any help is welcomed!

  • Other Network Infrastructure Subjects
1 ACCEPTED SOLUTION

Accepted Solutions
New Member

CAN NOT TELNET TO ROUTER

to be pretty sure of what the problem could be is to explain the error displayed when u enter d command

i want you to know it could be non connectivity problem or simply the fact that you are yet to enable enable password or secret,without this been enablepassword or secret configured, telnet becomes partial functional..

13 REPLIES
New Member

Re: CAN NOT TELNET TO ROUTER

you may have not defined password in line vty.

New Member

Re: CAN NOT TELNET TO ROUTER

Check and see if there are any access list applied to your vty interface that may prevent you from telneting in.

New Member

Re: CAN NOT TELNET TO ROUTER

A cisco, by default, will not allow a vty connection. You will need to do the following

router(config)# line vty 0 4

router(config-if)#login

router(config-if)#password

router(config-if)^z

New Member

Re: CAN NOT TELNET TO ROUTER

hi,

what is your real error message when you telnet on it ?

I don't think it missed passowrd on vty line . In the case, router will respond you " password is not set "

TTH

New Member

Re: CAN NOT TELNET TO ROUTER

If you have verified that no access-list is set, make sure you have set a default route.

(eg. ip route 0.0.0.0 0.0.0.0 200.200.200.1)

New Member

Re: CAN NOT TELNET TO ROUTER

I think the other gentleman hit it on the head with "line vty 0 4" but the other thing is you need to make sure the computer you are telnet'ing from can actually get to the router. See if you can ping it from your command line. I had a similar issue with a pc that had two nic cards. One was set for a class B address and accessed the Intranet/Internet. The other card I had to set up with in the subnet of the router E0 port so that I could telnet to it.

New Member

Re: CAN NOT TELNET TO ROUTER

make sure you dont have "transport input none" on the vty

New Member

Re: CAN NOT TELNET TO ROUTER

I think the problem would have been due to the missing line vty

config t

line vty 0 4

password (password)

login

You can hyperterm using the console cable and make these changes and try

New Member

Re: CAN NOT TELNET TO ROUTER

be sure to have the following configured:

line vty 0 4

login

password

1120
Views
0
Helpful
13
Replies
This widget could not be displayed.