[vpn] IPSec/VPN capable IOS for Cisco 7500 router

[Ahmed Benallegue]

Hi,

I am deploying IPSec using a Cisco 7140 router. In order to perform
tests, I'd like to use an old Cisco 7500 router (IOS 11.0(9), Flash:
8MB, Proc mem: 32MB) that is not IPSec capable. How can I upgrade the
IOS version (and which one should I use) with the minimum cost to have
an IPSec software capable router?
My aim is to test basic IPSec features as well as X509 standard (as I am
a CA).

Thanks.

-- 
+-------------------+--------------------------------+
| Ahmed Benallegue  | Network Analyst                |
| ECMWF             | e-mail: a.benallegue at ecmwf.int |
+-------------------+--------------------------------+

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