How to create a Network map

Hello All,

I recently started as a Junior Sysadmin in a company and need to do a complete  Network map(including workstations, printers, firewall, etc).
.Is there any free software which I can run on the network and get the entire map with details?
YohaAsked:
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masnrockCommented:
You could try Spiceworks or PRTG.
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SeanSystem EngineerCommented:
I've never had very good luck with automatic network maps. It might get you a general idea but a lot of information can be lacking. I just use LebreOffice Draw (basically Microsoft's Visio)
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nociSoftware EngineerCommented:
There are no universal network drawing tools... (free) .... there are some vendor specific tools that mostly map that vendors components in a network and maybe some generic options for other vendors.

Then again you need maps on various levels....
LAYER 1 - Cabling   - what device connects to what other device and on what ports,and what are the properties of the connections. Cable ownership (Think ISP, own, .. )
LAYER 2 - (V)LAN what macaddresses are connected, broadcast domains etc. etc.  (L2 tunnels/bridges). and how they are connected on L1
LAYER 3 - IPaddresses/netmasks gateways etc. etc.  (possible tunnels , L3 attributes, priority bandwidth class ...) - and how they are connected on L2
LAYER 7 - Applications where are what services and how are they connected.... (and how they are connected on L3)

combined this  gives you the network landscape.
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atlas_shudderedSr. Network EngineerCommented:
I agree with the above input.  One note to add.  A good network map can make you the superstar.  A poor one can make you look like a complete idiot.  When you get ready to start building your map, check the following site for some really useful information an tips:

http://networkdiagram101.com/
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yo_beeDirector of Information TechnologyCommented:
This sounds like a test. Your senior netowrk admin or manager should have this already.  Not saying that you should not complete this task, but it is odd that you are asked to do this.
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SnAkEhIpSCommented:
Less of a test, more like getting you familiar with the network. Perhaps with all the daily "fire-fighting" they have lost maintaining control of an accurate map. I walked into a similar situation some time ago. In either case, it's a win-win if you pull it off, which you can. What tools do you have current access to in your environment? Do any of these names sound familiar? Cisco Prime? SolarWinds? Anything you guys use for monitoring the network or inventory of devices?
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SnAkEhIpSCommented:
I'd add to Noci's comment that the size of the organization and the budget have much to do with your options. First, let's talk about what you guys have at your disposal already then how many nodes (roughly). I will say that there's a drawback to static IPAM and diagrams; they're static and require manual updates. In short order, people don't take the time to keep them updated and you're back to square one.

But, even if you wind up doing all of this work the hard way only to see the same outcome is not the point. The point is making the boss happy and learning about the network for your own benefit. Just so you know, there are dynamic software options out there with a price tag that keep all of this stuff up-to-date in automated fashion. Even if they aren't an option for you, you may benefit from reading about what they do and working your problem "backwards". In other words, if this is best, what's second best, third best, and so on until you get into what's free and what actually is your best current option. Below is a link to one of the best solutions I've found:  https://www.netbraintech.com/network-diagram-software/
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