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Cisco 4700 deleted username

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by okc_laker

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We have an employee who recently left our employment, shartly there after we tried to log into our 4700 router. Trying to log in with our normal username we received a % Login invalid. We did a little research on his last telnet session and it lookslike he removed the line "username ????? password ?????" from our configuration files and yes it looks like he wrote the running config to memory. Now we have no way (that we know of) to login. We tried to plug into the cosole port but could not find an RJ-45 port. Our current IOS is 11.1 and router is a 4700. Could anyone tell us if there is anyway to fix our problem.

Thank you.

5 replies

by joseph moore

The console port on a 4000 series router is the female DB-25 pin connector. If you are trying to use the normal blue rollover cable (9-pin serial on one end that plugs into a PC serial port, and RJ-45 at the other end) you need a converter.
The connector is on the right side of the router, just to the left of the power switch. I have 2 4000 models; I checked. It is the lowest DB-25 connector (I have 2 Ethernet connections above the console port on my routers).

Here is what Cisco has to say about the console port:
Console Port Connections
Each router includes an asynchronous router console port (female DB-25 connector) wired as a data communications equipment (DCE) device. The default parameters for this port follow:

9600 baud
8 data bits
No parity generated or checked
2 stop bits

And here is a Cisco document on how to recover a lost password on the 4700:
http://www.cisco.com/warp/public/474/pswdrec_827.shtml
(please remove any spaces)
YOu will need that DB-25 converter to do the procedure to connect to the console port.

hope this helps.

by okc_laker

Thank you for your answer, we have alot of 2500 routers and I was looking for an RJ-45 console port. I used the DB-25 female port and got a console login, added a new username and we can now telnet to our router.

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