[c-nsp] FWSM and IPv6

[Benjamin Lovell]

Did a quick search and found that IPv6 packet are still processed by  
the CPU not the ASICs on the FWSM. Also only works in routed, not  
transparent mode. I don't know any hard numbers for forwarding  
performance for the CPU but I would guess it's unacceptably low.

As for software versus architecture limitation, it's tough to say. I  
would guess architectural limitation but either way I doubt it will  
change as FWSM is near the end of it's life cycle for new feature  
development.

-Ben

On Jun 24, 2010, at 7:59 AM, Matthew Melbourne wrote:

> Are there any real-world data available for the performance of the
> FWSM when using IPv6 (actually multi-tenant IPv6 and IPv4). A
> Networkers' presentation I saw suggested that IPv6 forwarding was
> punted to the CPU rather than performed in hardware; is this still the
> case and is it an architectural issue which cannot be addressed
> through software?
>
> Cheers,
>
> Matt
>
> -- 
> Matthew Melbourne
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