The 2851 is a fine box, but its features and performance are more oriented toward a WAN edge. If you really want to push and sustain gig speeds, and your doing just LAN routing, you might want to consider the 3560 series.
It's not clear why you need a total of 5 routers, and one "smart" router. Perhaps you only need one hub router (with 4 SFP gig ports) and with four downstream switches (e.g. Catalyst Express 500s or 2960s)? Each downstream switch could be a separate subnet.
If you do use something like a 3560, and only need to use static unicast routes, the base image should suffice.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...