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DHCP Reservation issues

We have a DHCP superscope 10.1.31.0 with the below address pools

10.1.31.56-109, IPs are excluded from distribution
10.1.31.21-49, IPs are excluded from distribution
10.1.31.15-210, address range for distribution

I am trying to set reservations for some 10.1.31.18-21 IPs but it tells me they are in use....I cannot ping them and I dont see them in the address leases

Also, can I only set new exclusion ranges within the .15-210 range? What happens to .210-255?

Thanks,
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dealstrike
Asked:
dealstrike
1 Solution
 
madhatter5501Commented:
are they in use on any other devices like routers or switches or printers?  I know they are not pingable, turned off?  just a thought
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dealstrikeAuthor Commented:
No, they arent...10.1.31.x is only for desktops
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SuperTacoCommented:
Are you running RRAS on the DHCP server/  they might be in use on a VPN or for the VPN connection point.
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vivigattCommented:
Have you considered running a network packet capture tool (MS Netmon or Wireshark) on the DHCP server, filtering on the IP address you try to reserve, in order to see "something" answers?
If the DHCP server sits on the same LAN, you can also try to see in the IP address to be reserved is resolved by ARP (use arp -a command)
Also, is there another DHCP server/service in your infrastructure?
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elawadCommented:
i think your trying to reserve ip that is reserved which is 21 try to reserve the ip addresses starting 18 till 20 and see if the problem persists.
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vivigattCommented:
BTW:
.210-255 is not in your pool. And .1-15 is not either.
It means that you can set (static) address in these intervals, teh DHCP server will not offer them to DHCP clients
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