Need subnet and VLAN info from all switches

I need to gather all subnet and VLAN information from all our switches.  I have zero budget so it will have to be a free solution.  

We are looking to use this information to complete our IPAM.  

Is there an easy way to do this?
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Bryant SchaperCommented:
how many switches and make?
Zephyr ICTCloud ArchitectCommented:
SNMP would be free if you have it enabled/configured, then use snmpwalk to get the info, all you need is the correct OID's... To get you started, check this

There might also be free applications that do this kind of thing... I'll need to check on that.
bobjones1208Author Commented:
1500+ switches of every variety but all Cisco
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Zephyr ICTCloud ArchitectCommented:
Definitely scripting :)

If you want to find out which OID to use, Cisco provides an object navigator for it
Bryant SchaperCommented:
wow, that is alot of switches to have no management budget.  Scripting is the best solution but that will still be painful.
bobjones1208Author Commented:
Are there any open source tools available that will do this?  Looking at the OID and MIB stuff looks ridiculously complicated.  Just trying to figure out how to install net-snmp looks like it takes a Monumental effort.    What about if I didn't have 1500 devices?  How would you do this one by one?
Bryant SchaperCommented:
Yes, is a smaller situation, maybe 30 or less you could get all the data pretty quick, cisco even has a tool, cisco network assistant.  With 1500 devices, you should leveraging common configurations and central repositories.  That is why I am surprised to hear no budget.  if it is all Cisco, that is multi million dollar infrastructure on the low end of pricing.
bobjones1208Author Commented:
It's a long story.  I'm not in the networking department.  They have what's up gold but it doesn't have any of the information I'm looking for.   It's only used for monitoring uptime and bandwidth.
Zephyr ICTCloud ArchitectCommented:
It will be a difficult task none the less ...

The only other thing that might be helpful, but probably not will give you the real detail you're looking for, is cdp neighbour.
It's a Cisco proprietary protocol that will discover what's connected on the ports of the switch/router ... Though it only works if it's configured.

Using this protocol you could take a look at this maybe? It's Opensource.

I'm not saying this tool will actually do exactly as you ask, but it might be a step closer if scripting is undoable and budget is difficult ... There's other similar tools like this out on the Net that might be better, but might also be not free.

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bobjones1208Author Commented:
This got me started at least
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