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DHCP server never assisngs first 16 iPv4 addresses in a VLAN. Why?this thread has 2 replies and has been viewed 469 times
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#1
10th April 2012, 04:11
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DHCP server never assisngs first 16 iPv4 addresses in a VLAN. Why?
I understand from an article of MS Technet (see: http://technet.microsoft.com/en-us/l...=ws.10%29.aspx), that a DHCP server never assigns the first 16 IP addresses in the iPv4 range in a VLAN, as they are reserved. The first two make sense to me (x.x.x.0 and x.x.x.1). And what about x.x.x.255?
What is the reason for keeping these reserved? Please advise. |
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#2
10th April 2012, 10:32
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Re: DHCP server never assisngs first 16 iPv4 addresses in a VLAN. Why?
This is specific to Virtual Server so I suspect there is no reason apart from MS wanting to keep some IPs free
__________________
Tom Jones MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+ PhD, MSc, FIAP, MIITT IT Trainer / Consultant Ossian Ltd Scotland ** Remember to give credit where credit is due and leave reputation points where appropriate ** |
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#3
10th April 2012, 11:16
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Re: DHCP server never assisngs first 16 iPv4 addresses in a VLAN. Why?
Why microsoft create such reservations I don't know yet, there are 2 addresses reserved anyhow, and that is a) network address and b) broadcast address.
Secondly 1 address is used for a gateway device. Basically there are per vlan 3 addresses used within each new VLAN.
__________________
Marcel Netherlands http://www.phetios.com http://blog.nessus.nl MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE No matter how secure, there is always the human factor. |
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