Best way to build multi networks architecture

[Julien Faure]

Hello all,

I'm beginner in networking.

I need to build a new network architectures in a building.

Actually, the building have one network for two compagnies.

I want to spit it in 3 networks : 

- Internet provider network

- Company A network

- Company B network

I have the following contraint :

- No managed switch (no VLAN)

I also need a supplementary network for guests.

Before, I thinked to use a router with 4 interfaces but I feel like this is an bad idea.

My new idea is to use an router with 2 interfaces (like ISR 4221) and attache a managed switch with it to create VLAN.

I will have :

- One physical network for internet provider

- One physical network with 3 VLAN (Company A, company B and Guests)

Do you think that is the best way ?

Thank you in advance !

[Leo Laohoo]

---

@Julien Faure wrote:

I'm beginner in networking.

I need to build a new network architectures in a building.

---

Is this a school assignment?

[Julien Faure]

No, this is a real situation.

I understand why you say that..

[Leo Laohoo]

IF you want this network design done right, engage a reputable network integrator.

There are too many variables that are not included in this subject.

[marce1000]

 - Aligning with Leo's opinion , and or use advise or contract (later on) from a Cisco reseller.

 M.