Hi Len,

You can use the following IOS for the IPSEC, there are two options; IOS with
3DES and FW options, another without FW option.

With FW Option:
File name: c1700-k9o3sy-mz.122-10a.bin
Description: IP/FW/IDS PLUS IPSEC 3DES
Minimum Recommended Memory to download image - 8 MB Flash and 32 MB RAM

Without FW Option:
File name: c1700-k9sy-mz.122-10a.bin
Description: IP PLUS IPSEC 3DES
Minimum Recommended Memory to download image - 8 MB Flash and 32 MB RAM

If you have Memory problems than you can also select the older Versions of
IOS with 12.1.

Hope that it will help,
regards,
--
Arshad Mughal


"Steven A. Ridder"  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> No, but I'm sure anything above 12.0 is OK.  I'd check the IOS feature
> navigator on CCO and you can nail down exactly what you need.
>
>
> ""Len Campbell""  wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > Thanks for your help steve, do you know what version of the IOS is
> > supported?
> >
> > ""Steven A. Ridder""  wrote in message
> > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > The VPN module is used to take the encryption processing load off of
the
> > > CPU.  FOR IP SEC, you need a DES or 3DES designated IOS.
> > >
> > > --
> > >
> > > RFC 1149 Compliant.
> > >
> > >
> > >
> > > ""Len Campbell""  wrote in message
> > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > What is the VPN module used for on the Cisco 1720 if the router has
> the
> > > > capability in the IOS?  I want to do IP SEC VPN and I was told that
it
> > is
> > > > supported without the VPN module.  Just wondering the difference
> between
> > > the
> > > > two.  With and w/o the module.
> > > >
> > > > Thanks in Advance
> > > > Len




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