Question about Cisco 2801 Voice PVDM2-8 FL-SRST-24 SP Serv 64F/256D Refurbished CISCO2801SRSTK9RF Router

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Cisco router startup config

Is it possible to make a configuration without restart after making wr erase for cisco routers ?

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Yes thats possible.

Posted on Dec 18, 2008

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How do I reset my password?


In the below example i'm setting password as cisco for enable mode & Virtual terminals of router
1)Connect to the router and follow the below steps
Router>
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#enable secret cisco
Router(config)#line vty 0 4
Router(config-line)#password cisco
Router(config-line)#login
Router(config-line)#exit
Router#exit
Router con0 is now available
Press RETURN to get started.


Test:
Router>enable
Password: (type cisco to enter into the router privilaged mode)
Router#

Aug 09, 2015 | Routers

Tip

Cisco 3925 Router Password Recovery


TheCisco 3925 router is part of a family of networking equipment produced byCisco, which has been a network equipment giant for many years. Used 3925routers are available on the Internet at reasonable prices, so acquiring one isnot difficult. However, if the password is unknown or lost, reconfiguration isimpossible until the password is reset or recovered.

Cisco has built in aprocedure for rescuing lost or forgotten passwords or entering new passwords.
ThingsYou'll Need: Serial to RJ-45 cable;Terminal emulation software
Instructions
1.Connect your computer to the router with the blue serial-to-RJ-45 cable thatcame with the router.
The 9-pin D-shell end connects to your computer's serialport, while the RJ-45 end connects to the console jack on the router.
The RJ-45end resembles a slightly larger telephone jack connector.

2.Turn on your computer and establish a terminal session to the 3925. You can use any terminal emulator, and many are freely available on the Internet.
Configure the session settings as follows:9600baud8data bitsNoparity1stop nonflowering controllable router's power cable into an electrical outlet, and as the 3925 boots, you should see the Cisco boot messages.

If you don't see any output on your computer's terminal session, check your settings on the session and restart itif necessary.
Press "Break" within 30 seconds of powering on the router to enter rommon (rom monitor) mode.

3.Type "confreg 0x2142" and press "Enter" at the "rommon1>" prompt. This will cause the router to boot from its internal flashmemory without loading the configuration into memory.
At the following"rommon 2>" prompt, type "reset" and press"Enter."
This will cause the router to reload and ignore thepreviously saved configuration file.

4.Respond "no" and press "Enter" when prompted for responsesto enter the initial dialog or basic management setup.
Type "enable"and press "Enter" at the following "Router>" prompt.This will put you into enable mode and display the "Router#" prompts.Copy the non-volatile memory into memory with the "copy start up-config running-config" command, followed by the "Enter" key. Type"sho run" at the prompt and press "Enter" to display the current configuration, including the passwords, some of which may be encrypted.

5.Type "config t" at the prompt and press "Enter." At the"Router(config)#" prompt, type "enable secret <pswd>"-- where "pswd" is the password -- and press "Enter." Atthis point, your enable password is reset. Press "Ctrl" +"z" to return to the "Router#" prompt.

6.Type "config t" at the "Router#" prompts and presses"Enter." At the "Router(config)#" prompt, type"config-register 0x02102" and press "Enter" to reset theboot register to its normal setting. Press "Ctrl" + "z" toleave configuration mode. Type "copy running-config startup-config"and press "Enter" to save your changes. Reboot the router and youshould be able to login with your password.

on Sep 05, 2011 | Routers

Tip

Guide to Reset Password on a Cisco Router


How do I reset the password on my Cisco router?<br />I bought a Cisco 1700 router from an auction, but there is a password. How can I reset the router to original factory specifications? <br /><br />Sky sagem wireless router reset password? I just got this sky wireless router second hand and it has a password set on it. i tried to press the reset button at the back but it does not do any thing, it still comes as a password is set.<br /><br />How to reset password on dlink wireless router? I have a dlink wireless router model number DIR 825 . It works good but I am trying to access internet on my ipod and the password i have set is incorrect , this also happened when i tried to access internet on my laptop. When i first set up my ps3 i dont recall having to put a password in but this was when i first got the router. How do i reset the router password or find out what the password is AND if i reset the password or reset my router will my ps3 have to be reconnected or will it stay?<br /><br />How to reset password on a router? I recently acquired a linksys router (used) and need to know how to reset the password so that I can use it. Also, is there any way to modify a router to be useful as a cell/wifi blocker, or as a signal booster?<br />... <br /> ----From Yahoo Answers<br /><br /><br />To reset password on a Cisco/D-link/Linksys/Netgear router is a very common problem among people who want a secure network environment for surfing on the internet. If you are confused with the complicated procedure to reset or change the password on a router, or if you are trying to configure a Cisco router, but a password is blocking you from enable mode, don't worry, just do the steps as follows, password reset on a router is no longer upset to everyone.<br /><br />First, be informed that what you need:<br />.<a href="http://www.router-switch.com/Price-cisco-routers_c1">Cisco Router</a><br />.Computer<br />.Internet Connection<br />.Blue Serial Cable<br /><br />Guide for You to Reset Password on a Cisco Router:<br />1. Download a program called Putty from the first resource site below. PuTTy is a terminal emulator application which can act as a client for the SSH, Telnet, rlogin, and raw TCP computing protocols (PuTTy on Wikipedia).http://en.wikipedia.org/wiki/PuTTY<br /><br />2. Connect one end of the blue serial cable to the Cisco Router and the other to your computer. Open up the Putty program on your computer and select the radio button next to "serial" on the right-hand side of the start window. Click on the "Open" button in the bottom right-hand corner of the Putty start window to open the terminal.<br /><br />3. Power the Cisco Router on. As soon as the router begins loading in the green and black Putty terminal window, press the "Ctrl" and "Break" keys simultaneously until its going into rommon mode.<br /><br /><br />4. Once in rommon mode, you have to change the configuration register number to make the router boot from a blank configuration file. For the 2800 series Cisco Routers, the command "confreq 0x2142", changing the register number to 2142, worked. Search on cisco.com for information on your particular <a href="http://www.router-switch.com/Price-cisco-routers_c1">Cisco Router Series</a>.<br /><br />5. Type the restart command in rommon mode, which is "reset". This will boot the router up again. When it is finished, you should be able to type "en" to get into enable mode without a password.<br /><br />6. Once you change the running-config in RAM and save it to the startup-config in NVRAM, remember to change the configuration register number back to its default (usually 0x2102). This is important if you change anything on the running-config. <br /><br />Easy five steps help you finish resetting password on a Cisco router. Easy instruction, easy to follow. <br /><br />

on Jul 19, 2011 | Routers

1 Answer

What is the default password for cisco


There are two main methods to return a Cisco router to its original factory defaults. These two methods are described below.
Method 1
1. uses the config-register 0x2102 command in global configuration mode.
2. Check the configuration register on the router by issuing the show version command.
3. The configuration register setting is displayed in the last line of the show version command output and should be set to 0x2102. If this is not the case, enter the config-register 0x2102 command once in global configuration mode.
router#configure terminal
router(config)#config-register 0x2102
router(config)#end
router#
4. If the show version command is issued again, the same line in the command output will have '(will be 0x2102 at next reload)' appended to the current register setting.
5. Erase the current start-up configuration on the router with the write erase command.
Reload the router with the reload command. When prompted to save the configuration, DO NOT save.
router#reload
System configuration has been modified. Save? [yes/no]: n
Proceed with reload? [confirm]
Once the router reloads, the System Configuration Dialog appears.
--- System Configuration Dialog ---
Would you like to enter the initial configuration dialog? [yes/no]:
The router is now reset to the original factory defaults.
Method 2
1. uses the config-register 0x2142 command in global configuration mode.
2. Enter the config-register 0x2142 command in global configuration mode.
router(config)#config-register 0x2142
This causes the router to ignore the start-up configuration on the next reload. If a show version is issued, the last line in the command output will have '(will be 0x2142 at next reload)' appended to the current configuration register setting.
3. Reload the router using the reload command in enable mode. It is not necessary to save when prompted to save the system configuration.
router#reload
System configuration has been modified. Save? [yes/no]: n
Proceed with reload? [confirm]
After the router has reloaded, the System Configuration Dialog appears.
4. Enter no to the question "Would you like to enter initial configuration dialog?"
5. Change the configuration register setting to 0x2102 by entering the config-register 0x2102 command once in global configuration mode.
6. Issue the write memory command in enable mode to overwrite the existing start-up configuration with the current running configuration.
7. Reload the router with the reload command in enable mode.
Once the router reloads, the System configuration Dialog appears.
--- System Configuration Dialog ---
Would you like to enter the initial configuration dialog? [yes/no]:
The router is now reset to the original factory defaults.
Note: The configurations below are stored in ROMMON, and cannot be reset to Factory Default Settings by the write erase or config-register 0x2142 commands.
warm-reboot
memory-size iomem <not default>

Jun 18, 2013 | Routers

2 Answers

Change user name


Hello,

Please indicate the Model of the router you are referring to.

If its Cisco, first do a no username xxx password nnn command on the existing configuration. Then on the global configuration mode insert a new command with the new username and password. See example below:

#configure terminal
(config)# no username old-username password old-password
(config)# username new-username privilege 15 password new-password
(config)# exit
# wr memory

May 05, 2011 | Routers

1 Answer

Hi i have 1841 router what is the default user name password for this i tryed with user name passowrd as cisco but is saying that no user cisco pls help me



  • Follow these steps in order to recover your password:
    1. Attach a terminal or PC with terminal emulation to the console port of the router.
      Use these terminal settings:
      • 9600 baud rate
      • No parity
      • 8 data bits
      • 1 stop bit
      • No flow control
    2. If you can access the router, type show version at the prompt, and record the configuration register setting.
      Note: The configuration register is usually set to 0x2102 or 0x102. If you can no longer access the router (because of a lost login or TACACS password), you can safely assume that your configuration register is set to 0x2102.
    3. Use the power switch in order to turn off the router, and then turn the router back on.
      Important Notes:
      • In order to simulate this step on a Cisco 6400, pull out and then plug in the Node Route Processor (NRP) or Node Switch Processor (NSP) card.
      • In order to simulate this step on a Cisco 6x00 with NI-2, pull out and then plug in the NI-2 card.
    4. Press Break on the terminal keyboard within 60 seconds of power up in order to put the router into ROMMON.
      If the break sequence does not work, refer to Standard Break Key Sequence Combinations During Password Recovery for other key combinations.
    5. Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash.
      This step bypasses the startup configuration where the passwords are stored.
    6. Type reset at the rommon 2> prompt.
      The router reboots, but ignores the saved configuration.
    7. Type no after each setup question, or press Ctrl-C in order to skip the initial setup procedure.
    8. Type enable at the Router> prompt.
      You are in enable mode and should see the Router# prompt.
    9. Type configure memory or copy startup-config running-config in order to copy the nonvolatile RAM (NVRAM) into memory.
      Important: Do not type copy running-config startup-config or write. These commands erase your startup configuration.
    10. Type show running-config.
      The show running-config command shows the configuration of the router. In this configuration, the shutdown command appears under all interfaces, which indicates all interfaces are currently shut down. In addition, the passwords (enable password, enable secret, vty, console passwords) are in either an encrypted or unencrypted format. You can reuse unencrypted passwords. You must change encrypted passwords to a new password.
    11. Type configure terminal.
      The hostname(config)# prompt appears.
    12. Type enable secret password> in order to change the enable secret password. For example:
      hostname(config)#enable secret cisco
    13. Issue the no shutdown command on every interface that you use.
      If you issue a show ip interface brief command in privilege EXEC mode, every interface that you want to use should display up up. For example:
      Router#show ip interface brief
    14. Type config-register configuration_register_setting>. Where configuration_register_setting is either the value you recorded in step 2 or0x2102 . For example:
      hostname(config)#config-register 0x2102
    15. Press Ctrl-z or end in order to leave the configuration mode.
      The hostname# prompt appears.
    16. Type write memory or copy running-config startup-config in order to commit the changes.

Jul 02, 2010 | Cisco (1841) Router (cisco1841)

1 Answer

I cannot access to its configuration page


connect the blue cisco cable to the console port of the router concerned. Then using a pc based terminal emulator such has hyperterminal or putty (download using a google search), login into the router. when in privileged exec mode, type the following command, show running-config, or wr term or sh run and you will get to view the configuration.

Dec 04, 2009 | Routers

2 Answers

Dhcp setup on a Cisco 2851 router


Let's look at how to configure basic DHCP on an IOS-based router. For this example, we'll start off with the default configuration on a Cisco 2611 router running IOS 12.2. (The configuration should be the same—or very similar—on all IOS-based routers).
To begin, connect the router's Ethernet port to a switch, and connect the switch to a laptop, which will serve as the DHCP client.
To configure Cisco IOS DHCP, follow these steps, which include sample commands:
1.Configure an IP address on the router's Ethernet port, and bring up the interface. (On an existing router, you would have already done this.)
Router(config)# interface ethernet0/0
Router(config-if)#ip address 1.1.1.1 255.0.0.0
Router(config-if)# no shutdown2.Create a DHCP IP address pool for the IP addresses you want to use.
Router(config)# ip dhcp pool mypool3.Specify the network and subnet for the addresses you want to use from the pool.
Router(dhcp-config)# network 1.1.1.0 /8 4.Specify the DNS domain name for the clients.
Router(dhcp-config)#domain-name mydomain.com5.Specify the primary and secondary DNS servers.
Router(dhcp-config)#dns-server 1.1.1.10 1.1.1.116.Specify the default router (i.e., default gateway).
Router(dhcp-config)#default-router 1.1.1.17.Specify the lease duration for the addresses you're using from the pool.
Router(dhcp-config)#lease 78.Exit Pool Configuration Mode.
Router(dhcp-config)#exit

I hope this is helpfull for you.

Thanks

Vikrant

Oct 26, 2009 | Routers

1 Answer

I would like to configure port fowarding on the Cisco 857 router using the http interface rather than via any coding. Is it possible and what do I need to do? In my scenario, the router must be configured...


It is possible to configure your router via a web browser. Although it’s disabled by default, your router has its own mini HTTP server built in. This provides another way to gain access to the router for the purpose of issuing commands. To enable the HTTP server, you have to use the command "ip http server" from the global configuration mode.

cisco(config)#ip http server
cisco(config)#

Then open a web browser and point it to one of your router’s IP addresses. The interface is not really nice, but you can issue commands using hyperlinks.
For security reasons I still suggest that you keep the HTTP server turned off, since it offers just another point of access for potential hacking.

What is so bad about the command line? Configuring port forwarding is actually pretty easy, once you know the commands.

Type show ip interface to find the name of the interface you want to set port forwarding for.

The show ip nat translations command shows you the current port forwards on Router.

Type configure to enter the configuration mode
The command for port forwarding is: ip nat inside source static (TCPorUDP) (YourComputersIP) (PortToForward) interface (name)(PortToForward)

in you case:
ip nat inside source static tcp 192.168.0.1 5900 interface (name) 5900
and
ip nat inside source static tcp 192.168.0.2 5901 interface (name) 5901
replace (name) with the interface name you got from the first command.

Then press CTRL-Z to end the Configure Session
Type copy run start once you tested your settings and press ENTER for the question Destination filename [startup-config]?

I have heard of some commercial tools that let you configure your router via web interface, but they are very expensive (around 1400$).
You can try it out for 14 days. Go here.
If you want to play with a free one, go to Cisco (link) and check it out. (You have to be a member though.)


If you have any more questions, just come back here and leave a comment - I'm happy to help.

Oct 24, 2009 | Cisco 857 Router (CISCO857K9)

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