Solved

Can't run 'show run' command on Cisco 1750 Router

Posted on 2010-11-10
12
741 Views
Last Modified: 2012-05-10
I have a Cisco 1750 router that is constantly losing it's ability to route traffic. I can ping it and telnet to it, but at least once a day it stops routing. I logged into it and ran a 'sh ver' and that worked, but when I do a 'sh run' it gives me the message:

% Invalid input detected at '^' marker.

The ^ symbol is pointing to the 'u' in run. If I type in sh ? I don't see run as an option. Is there some other option I need to enter to see my configuration?
0
Comment
Question by:Greg27
  • 6
  • 5
12 Comments
 

Author Comment

by:Greg27
ID: 34103355
Here is the sh ver results:

Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-Y-M), Version 12.1(6), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Wed 27-Dec-00 21:18 by kellythw
Image text-base: 0x80008088, data-base: 0x805E5778

ROM: System Bootstrap, Version 12.0(3)T, RELEASE SOFTWARE (fc1)

Router uptime is 2 days, 1 hour, 5 minutes
System returned to ROM by power-on
System image file is "flash:c1700-y-mz.121-6"

cisco 1750 (MPC860) processor (revision 0x601) with 12288K/4096K bytes of memory.
Processor board ID JAD050420ZP (4096001795), with hardware revision 3097
M860 processor: part number 0, mask 32
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
1 Serial(sync/async) network interface(s)
32K bytes of non-volatile configuration memory.
4096K bytes of processor board System flash (Read/Write)
0
 
LVL 9

Accepted Solution

by:
avilov earned 500 total points
ID: 34103419
you have to login with enable account

try to run

en

at the prompt, the prompt should change to #
it probably will ask for a password too
0
 

Author Comment

by:Greg27
ID: 34103471
I thought when you connected via serial cable the password you were entering was the enable password. Is there a way to reset the enable password if you can't remember it?
0
 
LVL 9

Assisted Solution

by:avilov
avilov earned 500 total points
ID: 34103569
1. it depends on your config

2. yes you can reset the password. but you need to reboot your router for that

http://www.cisco.com/en/US/docs/routers/access/1700/1750/hardware/installation/guide/trbshoot.html#wp1015044
0
 

Author Comment

by:Greg27
ID: 34103603
Ok, looks like I found the password via a backup of the config. Can I ask one last question? I am trying to change the enable password. My config shows the following:

enable secret 5 xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
enable password xxxxxxxxx

If I enter 'enable password xxxxxxx' where xxxxxxxxx is the new password, it doesn't work. Can I take that line out of my config? What do I change about the secret?

Thanks
0
 
LVL 9

Expert Comment

by:avilov
ID: 34103683
enable password uses very weak type-7 encryption that was broken many-many years ago. you should avoid it.

use enable secret, it has much better encryption
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 
LVL 34

Expert Comment

by:Istvan Kalmar
ID: 34104417
plese try 'write terminal' it is same command....
0
 

Author Comment

by:Greg27
ID: 34104548
So, do I need to do the following:

no enable password xxxxxxxxxxx

and then:

enable secret 5 xxxxxxxxxxxxxxx
0
 
LVL 9

Expert Comment

by:avilov
ID: 34104834
yep

enable secret xxxxx
no enable password
0
 

Author Comment

by:Greg27
ID: 34113575
When I do the enable secret xxxxx it is telling me:

The enable secret you have chosen is the same as your enable password.
That is not recommended. Re-enter the enable secret.

Now, this is not the same password I am using for my enable password, so not sure why I am seeing this.
0
 
LVL 9

Expert Comment

by:avilov
ID: 34114853
just change the secret, delete enable and _before_ saving to startup config, telnet (keeping serial connection open) and verify that password works

if everything looks good save the config
0
 

Author Closing Comment

by:Greg27
ID: 34227921
Thanks for the help!
0

Featured Post

Free Trending Threat Insights Every Day

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

Join & Write a Comment

Suggested Solutions

Let’s list some of the technologies that enable smooth teleworking. 
I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

743 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now