* General questions:

- How many devices in the campus ?

[should probably explicit device, as in: only hosts and net eqpt, or everything, including printers, wireless devices, etc...]
20-30 computers,
14 local printers, 
2 switches,
2 routers 
and 2 scanners.

- How many buildings? Distances between them, if known ?
In the same building
- Fiber links between the buildings ?
there is not

* Internet

- External connectivity ? Type, capacity ?
there is ADSL (is 20M) and leased line (6M)
- Are you providing routes to your upstream provider, or are they statically routed to you?
statically routed to you


* IP addressing:

- Could we get an IP address map ? A description of how are subnets used ? 
(Check the Astaro Interfaces to know what IP address map you are using.)
The Internal IP addresses are private and allocate by Academie
The DMZ and Leased line of external interface of Astaro are public address and given by the provider.
The second external interface of Astaro linked to ADSL router is private addresses and given by Academie.


- Is there an addressing plan ?
IF there is more than one network that needs private IPs, it is generally given different range of networks. It is usually class C network

- Are the IP addresses assigned by their ISP, or have they got a Provider Independent (PI) allocation ?
Yes, the DMZ, External Astaro network 'leased line', and external IP address of ADSL router 


- Are private or public (routable) IP addresses being used inside the network ? 
DMZ are public IPs (routable)

- Are you using one or more layers of NAT ?
Yes for internal network

* Routing vs switching:

- Is the core L3 or L2 (routed or switched) ?
It is switched

- What kind of routing protocols, if any ?
none
- Is Spanning Tree enabled in the network ?
no it is not.