Cisco 1720 Stops routing

I just started at a new company about 2 months ago.  We have a Cisco 1720 router that belongs to us for our T-1.  The Cisco IOS is 12.0(3)T, which is older.  All of the sudden in the last weed and a half it has stop routing traffic twice.  I can't ping its interface, the only thing that makes it work again is shutting it off and turning it back on.  Any ideas?
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Upgrade to the newest IOS. I had a smiliar problem with our old 1700 series router that was corrected with an upgrade. In fact, I have had this problem with several Cisco devices over the past few years. I have no idea why this happens, but it does. Downloading the IOS will require some sort of Cisco support I believe. We have SmartNET contracts on all of our Cisco devices. I think thay are relatively inexpensive ($130.00 or so). This allows for 1 year of Cisco support for your device.


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j0s3phAuthor Commented:
Getting the support is what I was working on yesterday.  I think that the 12.0(3)T IOS is from Apr 1999 if I am not mistaken.  I will be upgrading this within the next week.  I also recently replaced the battery on our APC UPS.  There are multiple devices on it, but I am wondering if there is any chance that might be causing the problem.  I do know that there are many exploits available to attackers with the IOS I have in my router though.
Sometimes it is because of the hardware itself especially if it gets hot.
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IOS 12.0(3)T ?! Wow, that's quite ancient.  Agree that you should upgrade your IOS if at all possible. There are several DoS (Denial of Service) vulnerabilties & bugs for an IOS version this old.  That may very well be why you're getting traffic stopped periodically.
  For security problems, see the following:

Just be aware that the newer the IOS version, the higher the DRAM & flash memory requirements are. Also, the more features an IOS image has, such as the firewall feature set, etc will increase the DRAM/flash requirements.

j0s3phAuthor Commented:
Thanks for the input.  I definitely won't be using hardly any features at all.  I know this router is older and it would be wise to minimize it's features.  It has taken a lot of time to read all of the things my router is vulnerable to such as DoS.  I really hope this fixes the problem and there is nothing wrong with my hardware.
the upgrade still good for you. do not use the IOS that has lot of features and require more memory and flash. You  can get the basic IOS , but the newest one. the upgrade is easy and require only uploading the ios and earsing the old and installing the new one. so 3 steps but make sure you get the right ios that fits what you have (RAM and Flash). hope this helps
j0s3phAuthor Commented:
I have purchased a Cisco 1721.  The model I had didn't have enough space to upgrade the IOS to anything within the last 4 years.
j0s3phAuthor Commented:
The new IOS fixed the problem. Thanks.
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