How to Upgrade Your Cisco 3845 Router with C3845-adventerprisek9-mz.151-3.T3.bin
If you have a Cisco 3845 router and you want to enhance its features and performance, you may want to upgrade its IOS software to the latest version. One of the recommended IOS versions for this router is C3845-adventerprisek9-mz.151-3.T3.bin, which is part of the 15.1(3)T release. This IOS version provides advanced enterprise services, such as VPN, firewall, voice, and video capabilities.
In this article, we will show you how to upgrade your Cisco 3845 router with C3845-adventerprisek9-mz.151-3.T3.bin in a few simple steps. But before we begin, make sure you have the following requirements:
A valid service contract with Cisco or a local partner
A minimum of 512 MB of DRAM and 128 MB of flash memory on your router
A TFTP server that can host the IOS image file
A backup of your current configuration and IOS image file
A console cable and a terminal emulator software to access your router
Once you have these requirements, you can proceed with the following steps:
Download the C3845-adventerprisek9-mz.151-3.T3.bin file from the Cisco website[^5^] or from a local partner. Save it to your TFTP server directory.
Connect your router to the TFTP server using an Ethernet cable. Make sure they are on the same subnet.
Connect your PC to the router's console port using a console cable. Launch your terminal emulator software and configure it with the following settings: 9600 baud rate, 8 data bits, no parity, 1 stop bit, and no flow control.
Log in to your router using your username and password. If you don't have one, use the default credentials: username: cisco, password: cisco.
Enter privileged mode by typing enable and entering your enable password. If you don't have one, use the default password: cisco.
Verify your current IOS version by typing show version. You should see something like this:
ROM: System Bootstrap, Version 12.4(13r)T11, RELEASE SOFTWARE (fc1)
cisco uptime is 2 hours, 15 minutes
System returned to ROM by power-on
System image file is \"flash:c3845-advipservicesk9-mz.124-22.T5.bin\"
If your current IOS version is lower than C3845-adventerprisek9-mz.151-3.T3.bin, you can proceed with the upgrade. Otherwise, you don't need to upgrade.
Copy the new IOS image file from the TFTP server to your router's flash memory by typing copy tftp flash. You will be prompted to enter the IP address of the TFTP server and the filename of the IOS image file. For example: