COMPUTER TIPS

How to install Router image using TFTP server?

 

 

oday tip will help you to install the router IOS to a Cisco 2500/2600/2800/3800 series routers. First make sure, you have installed and configured any TFTP (Trivial File Transfer Protocol) server over the LAN port. If you are trying to boot up your router without an IOS, the nonworking router will boot up in ROMmom

mode and the router first prompt will look like this:

rommon>
 

First run the set command to verify the ROMmom default variables.

In this mode all commands are case sensitive.

rommon1>set

Now run the TFTP download command to start the restore image process then press the enter button. 

rommon 2> tftpdnld 

After running the tftpdnld command, the following information will appear as under:

Now type the following information, for example router ip address, mask and default gateway then tftp server address. 

rommon 3 > IP_ADDRESS=10.1.1.2                            (router ip address)

rommon 4 > IP_SUBNET_MASK=255.0.0.0                  (default subnet mask)

rommon 5 > DEFAULT_GATEWAY=10.1.1.2                (gateway address)

rommon 6 > TFTP_SERVER=10.1.1.1                          (tftp server address)

rommon 7 > TFTP_FILE=12.0(4)t                                  (IOS file name)                                                                                                                 

Now again run the tftpdnld command to start recovery process immediately. 

rommon 8 > tftpdnld 

IP_ADDRESS: 10.1.1.2

IP_SUBNET_MASK: 255.0.0.0

DEFAULT_GATEWAY: 10.1.1.2

TFTP_SERVER: 10.1.1.1

TFTP_FILE: 12.0(4)t 

Invoke this command for disaster recovery only.

WARNING: all existing data in all partitions on flash will be lost!

Do you wish to continue? y/n:  [n]:  Yes 

Receiving 12.0(4)t from 10.1.1.1 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

File reception completed.

Copying file 12.0(4)t to flash.

Erasing flash at 0x60100000 

Now run the reset command to restore router as factory default settings. 

rommon 16 > reset 

Now after some time, your router will boot up with factory default settings.

      

Suggested Reading

•  Break or recover the router password

•  How to configure the Cisco IOS IDS step by step?

•  Routing Information Protocol (RIP) Configuration

•  Point-To-Point Leased Line Implementation

•  How to configure Stub area in OSPF protocol?

• How to configure site-to-site VPN tunnel using ASA?

•  Router basic Troubleshooting Tips

• How to configure Remote Access VPN using ASA?

• How to perform route summarization using BGP protocol?

• How to install Router image using TFTP server?

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• How to protect EIGRP router from receiving unsigned routing updates?

 

• How to configure Role-Based CLI Access using Cisco IOS?

• How to configure BGP with local preference attribute?

• How to configure Totally Stub Area in OSPF protocol?

• How to perform route summarization in OSPF protocols? New

• How to configure BGP between two different autonomous systems?

• How to configure virtual link between different areas in OSPF?

• How to perform unequal-cost load balancing using EIGRP?

•  How to configure Site-to-Site IPsec VPN?

• How configure EIGRP authentication to prevent unauthorized   access?

• How to configure BGP with weight attribute?

•  How to configure OSPF step by step?

• How to perform configuration and convergence between RIP and IGRP protocols?

•  How to configure OSPF with multiple areas?

 

•  Interior Gateway Routing Protocol (IGRP) Configuration

•  Extended IP Access Control List

•  Enhanced Interior Gateway Routing Protocol (EIGRP) Configuration

•  Useful Router commands and configuration

•  Standard IP Access Control List

•  Common Frame Relay Configuration

•  Integrated Services Digital Network (ISDN)