12.4(15)T is last Cisco IOS T Release for Select Cisco Router Platforms
If you looked at my last post you will notice that 12.4(20)T has hit the streets for download on CCO; however one thing I failed to mention was that IOS Software Release 12.4(20)T and later Cisco IOS T releases will not support several platforms that were supported in prior Release 12.4T releases. These platforms will be supported by Release 12.4(15)T via regularly scheduled software maintenance rebuilds and bug fix support until the end of software maintenance date for the respective platform is reached. So if you attempt to download 12.4(20)T to your router by accessing CCO and you noticed that 12.4(20)T is not available for your router, well then you most likely are effected by this specific bulletin .
So what platforms aren’t supported exactly? Well here’s your list:
- Cisco SOHO 90 Series
- Cisco 831, 836, and 837 Series
- Cisco 1701, 1711, 1712, 1721, 1751, 1751-V, and 1760 Series
- Cisco 2610XM-2611XM, 2620XM-2621XM, 2650XM-2651XM, and 2691 Series
- Cisco 3631 and 3660 Series
- Cisco 3725 and 3745 Series
- Cisco 7400 Series
- Cisco AS5850 Universal Gateway
Please read the IOS Software Release 12.4T Q&A for additional details:

Comment by Gjeem Markaj
on 14 July 2008:
Joe,
I recently upgraded my ASAs to 8.0(3) and I noticed that ASDM now stars out your IKE pre-shared keys for remote access VPNs (they used to be in cleartext). Is there any way to retrieve them or see them in cleartext again?
Thanks!
Gjeme
Comment by Joe Harris
on 14 July 2008:
Gjeme,
You will not be able to view the keys from the within the ASDM application. You can copy the running config to a TFTP server using “write net” and parse through it to get the pre-shared keys or you can access https://IP Address of ASA/admin/config. Those will be the only way you can view the keys.
Comment by David
on 14 July 2008:
Gjeme, you can do a ‘more system:running-config’, this will display the passwords in clear text.
David
Comment by Joe Harris
on 14 July 2008:
True, but keep in mind there is no way to see them from the ASDM interface which I think is his issue.
Comment by Gjeme Markaj
on 15 July 2008:
Thanks for the tips!
Comment by Nikolay Shopik
on 15 July 2008:
strangely 12.4(20)T still unavailable for 850 series.
Comment by FCA
on 15 July 2008:
Joe, are you sure?
Try starting ASDM then click Tools, then select Command Line Interface, then type
more system:running-config | include key
then click button labelled Send.
Now you can see preshared keys in ASDM.
Comment by Joe Harris
on 15 July 2008:
Sure you can view it from there, it’s issuing the ’show’ command from the CLI of the ASA…however try and view it from the Configuration -> Remote Access VPN -> Network (Client) Access -> IPSec Connection profiles page and you will be unable to view it or anywhere else a pre-shared key is listed…I even double checked with the ASDM dev group and they confirmed.
Comment by Joe Harris
on 16 July 2008:
Nikolay,
The 850’s are in the same boat as the other routers listed in the product bulletin they were just left off the list by accident:
http://www.cisco.com/en/US/prod/collateral/iosswrel/ps8802/ps6968/ps6441/product_bulletin_c25_466578.html
Comment by Nikolay Shopik
on 17 July 2008:
Thanks Joe, still think its kind unfair for 850 series(introduced in same time as 870). Will wait 12.5M because 12.4(20)T have big amount of bug fixes we are need to.
Comment by Joe Harris
on 18 July 2008:
Nikolay, 12.5(anything) code will be a while before hitting CCO…Please ask your Cisco SE for further details. IOS Release 12.4(15)T will be a long-lived stability release where regularly scheduled software maintenance rebuilds are planned. So the current recommended release for you would be 12.4T up to 12.4(15)T for new features and hardware support. Again ask your SE for further details.