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Some IP's do not appear on DHCP - Page 2

post #11 of 19
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Quote:
Originally Posted by herkalurk View Post
If you have static addresses, they need to be outside of the DHCP scope. What subnet mask are you using and what is the DHCP range? Standard for most home routers is subnet mask of 255.255.255.0 and the dhcp range of 50 users starting at .100

If you put all of your static services below .100 then you won't have any conflicts, and all of your services will still communicate without issue.
We use a subnet of 255.255.252.0. The IP's are then given out by the server's DHCP, if this helps?

And all of the static ip addresses (mostly all) are below .100.
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post #12 of 19
How many devices are on your network? The way you made it sound I didn't think you would need/have a subnet for 1000+ devices.
Edited by herkalurk - 3/31/11 at 7:48am
post #13 of 19
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Quote:
Originally Posted by herkalurk View Post
How many devices are on your network? The way you made it sound I didn't think you would need/have a subnet for 1000+ devices.
There are 300+ devices on our network, these include printers, WAP's, laptops, projectors(for remote managment).
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post #14 of 19
Quote:
Originally Posted by fibre_optics View Post
There are 300+ devices on our network, these include printers, WAP's, laptops, projectors(for remote managment).
Not to be too nosey, but why such a large subnet then? It seems a bit excessive unless you're planning on having a few hundred more devices in the near future.
post #15 of 19
That's a lot of UDP traffic at 9am..
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post #16 of 19
this should help you discover everything on your network.

http://www.whatsupgold.com/free-software/network-tools/

I would strongly suggest your IT department invest in some tools.
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post #17 of 19
For any sizeable network you could just view the mac address table on the switch.

Also, if you wanted to do it from a Windows box you could scan your subnet with something such as Angry IP Scanner, and then do an arp -a from command line.

Side note, lumping everything into a giant subnet may not be the greatest idea.
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post #18 of 19
Quote:
Originally Posted by beers View Post
For any sizeable network you could just view the mac address table on the switch.

Also, if you wanted to do it from a Windows box you could scan your subnet with something such as Angry IP Scanner, and then do an arp -a from command line.

Side note, lumping everything into a giant subnet may not be the greatest idea.
That could just be the range of the network, not the actual subnet everything is on. 1 large flat layer 2 network like that would be a nightmare. I doubt everything is on 1 switch not with 300 devices. Well they could be on a 4506, but who in their right mind would get a chassis and not have any network tools?
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post #19 of 19
Someone asking questions, and not really looking for answers..
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