[c-nsp] IOS Upgrade to SXI3

[Alan Buxey]

Hi,
> Thanks to everyone who sent in their feedback on SXI3.  We're in the process of upgrading a few of our routers to the monolithic SXI3.

yes, we have had no big issues with SXI3 on a handful of our routers
and are therefore bringing the others up to match - well aware that there
are a few caveats on SXI3 but thats far less than we currently skirt around! 

:-)

alan