IOS architecture

Pete Lumbis alumbis at
Sat Oct 27 21:00:46 UTC 2012

You might want to take a look at the CEF book, which expands on this

both of these are still very accurate on how IOS operates today. The
only major changes with IOS-XE is that IOS is now a process and packet
forwarding is handled in hardware instead of software.

For NX-OS and IOS-XR the software/operating system is wildly different
and I think there is a definite gap in literature out there.

On Fri, Oct 26, 2012 at 7:12 PM, Andrey Khomyakov
<khomyakov.andrey at> wrote:
> Does anyone know if there is an updated version of this book? Year 2000
> seems so distant now...
> --Andrey

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