anyone have good instruction with the minumum risk to upgrade the router IOS
PRODUCT TYPE (Model Number): Cisco 2801
* SOFTWARE VERSION:IOS Version:12.4(4)XC7
The latest 12.4T version you can find at:
I would advise to use the same feature set, hence the file to download is:
this device has 256Mb of DRAM and 64Mb flash:
Cisco 2801 (revision 6.0) with 238592K/23552K bytes of memory.
When performing the upgrade on a 2800, you will have downtime during the time when the device is reloading.
To reduce downtime, you may be able to use the warm upgrade feature described here:
for the upgrade procedures themselves, you can use the following page:
This seems to refer to your earlier post about the bus error, doesn't it?
First, make a note of your current IOS feature set (IP Base, Advanced Security, Advanced IP Services, Advanced Enterprise Services, etc.) - looking at the show version and/or on the current image name will help you identify the feature set. Second, find out how much DRAM and FLASH your router is equipped with - again, the show version is your friend here.
Then, try to locate the newest 12.4T or 12.4 IOS using the Feature Navigator at the following link:
Select the 2801 as your platform and after clicking on the Continue button, set first the major release to 12.4T, then select the most recent release and then browse over available feature sets to see the hardware requirements and the features available in the particular image. For example, the 12.4(24)T3 image for 2801 in the Advanced IP Services feature set requires 192MB DRAM and 64 MB FLASH. You may also try having a look on the 12.4 track.
You may even try to look for newest versions in the 15.0M track but these IOSes need generally as much as twice the memory than their slightly older 12.4T counterparts so I don't believe the 15.0M would be usable for you right now unless you have a router having lots of DRAM.
After you select your IOS version that would meet the hardware resources you have available, I strongly recommend comparing its available features to your current IOS version using the Feature Navigator again:
If you properly enter the exact information on both your current and your newly selected IOS version into this tool, it will nicely display the different features in both images, as well as the same features.