Solved

DHCP Reservation issues

Posted on 2011-09-08
6
423 Views
Last Modified: 2012-05-12
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,
0
Comment
Question by:dealstrike
6 Comments
 
LVL 11

Expert Comment

by:madhatter5501
ID: 36504086
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
0
 

Author Comment

by:dealstrike
ID: 36504207
No, they arent...10.1.31.x is only for desktops
0
 
LVL 10

Expert Comment

by:SuperTaco
ID: 36507579
Are you running RRAS on the DHCP server/  they might be in use on a VPN or for the VPN connection point.
0
Free eBook: Backup on AWS

Everything you need to know about backup and disaster recovery with AWS, for FREE!

 
LVL 16

Expert Comment

by:vivigatt
ID: 36509395
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?
0
 
LVL 7

Expert Comment

by:elawad
ID: 36901831
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.
0
 
LVL 16

Accepted Solution

by:
vivigatt earned 500 total points
ID: 36906714
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
0

Featured Post

Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

I wrote this article to explain some important DNS concepts that should be known to avoid some typical configuration errors I often see in forums. I assume that what is described here is the typical behavior of Microsoft DNS client. I don't know …
New Windows 7 Installations take days for Windows-Updates to show up and install. This can easily be fixed. I have finally decided to write an article because this seems to get asked several times a day lately. This Article and the Links apply to…
To efficiently enable the rotation of USB drives for backups, storage pools need to be created. This way no matter which USB drive is installed, the backups will successfully write without any administrative intervention. Multiple USB devices need t…
This tutorial will walk an individual through the process of transferring the five major, necessary Active Directory Roles, commonly referred to as the FSMO roles to another domain controller. Log onto the new domain controller with a user account t…

685 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question