Reason for help:
I work for a small school district and I believe it has come time to re-visit our network design. The current design was implemented roughly 10yrs ago and has worked fine until recent technologies have been introduced (wireless, virtualzation for desktops and servers, and an increase in the number of additional physical devices).
I'm interested in a reconfiguration to reduce broadcast zones, improve security, and reduce the load from what is currently our "core" switch. I'm seeking professional opinions.
As it stands now, (see attachment: currentnetworkconfig.jpg) the network is mainly 3 physical sites, with 4 routed (/24) flat networks. (Networks E- J are VDI implementations which are non-routed /24 networks in their own VLAN).
Originally each Subnet A-D was setup to be (/24) networks to have a mix of servers, desktops, wireless, and printers all smashed into their respective single flat networks. (Network's A&D were two physical sites before a construction project merged them to 1 physical site, but the 2 logical networks remain.) The networks within each subnet were expanded through use of un-managed switches and hubs (*gasp*) to meet the needs physically. Each network carries a load of roughly 150 devices.
Site A is connected to the WAN via an 8mpbs connection. Sites B&C are connected to Site A via a VPN tunnel (8mpbs) through the ISP.
As for me, I passed the CCNA exam roughly 8yrs ago, so I'll nod when you are throwing out terms, but in reality I'll be flipping the old textbooks in order to keep up logically. I know networking basics, but pardon me if I flub a term or two.
Proposed Network Design:
See Attached: newnetworkconfig.jpg I can fill in details if needed, but I thought this would get things started.
Something to note we are the recipient of a huge local fiber build out which will bring 1gbps to each of our sites. So inter-site communication will drastically improve, and thus will the load on the core.
What I'm looking for:
- Opinions with the proposed design layouts.
- If the 3750 is appropriate to perform the routing / intra-vlan switching?
- Can the 3560 listed in Site A maintain potentially 9+ vlans for up to 300 devices?
- Should I stay with eigrp?
Secondary Questions: (probably better in another question)
- Ideal placement of Microsoft DCs for DNS / DHCP?
- Suggested network monitoring tools? (NMIS? Orion?)