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Question
Monday, February 3, 2014 2:23 PM
can dhcp server and default gateway be the same ip address
All replies (5)
Tuesday, February 4, 2014 5:19 AM ✅Answered
Hi,
Yes, you can. In most cases, the router that acts as the default gateway for TCP/IP hosts. If the DHCP server is the router in a small network, the default gateway usually points to the IP address of the DHCP server. In addition, a router that acts as the default gateway needs to maintain this level of routing knowledge to reach other remote network segments in the larger internetwork, so when you use the DHCP server as the default gateway, you may also need to take the performance into account.
Best regards,
Susie
Tuesday, February 4, 2014 7:33 AM ✅Answered
Brian, as others have responded, yes they can.
However, since the question is open ended and leaves some assumptions, I have some questions.
My main question is will your Windows Server be the gateway (possibly running RRAS and NAT), or will it be a hardware router device, such as a Linksys, Cisco ASA, etc?
If the Windows server is the gateway, then you can install DHCP on it to service the network. If it's a hardware device, then that can support DHCP, too.
My only take on it is if you have an AD (Active Directory) infrastructure, it's recommended to use Windows DHCP because it supports additional options that a device's DHCP doesn't, as well as that the DHCP APIs and DNS APIs work together to provide Secure DNS Dynamic Updates, which is important in AD.
And if the gateway is a Windows server, then it is recommended that it is not a DC (domain controller), because if it is a gateway, then it will have more than one NIC, and DCs do not play well with multiple NICs and will cause problems with AD.
Ace Fekay
MVP, MCT, MCSE 2012, MCITP EA & MCTS Windows 2008/R2, Exchange 2013, 2010 EA & 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer
Microsoft MVP - Directory Services
Complete List of Technical Blogs: http://www.delawarecountycomputerconsulting.com/technicalblogs.php
This posting is provided AS-IS with no warranties or guarantees and confers no rights.
Tuesday, February 4, 2014 8:58 AM ✅Answered
if you are considering a hardware device, to act as a gateway and a DHCP server. then i think it should be fine.
but if you are considering an AD DC to be your DHCP and a gateway, then you can try see how it goes.
But Ace reply, stated that AD does not play well in multiple NICs. Then I guess just give it a shot if you want to have an infrastructure like that.
Every second counts..make use of it. Disclaimer: This posting is provided AS IS with no warranties or guarantees and confers no rights.
Tuesday, February 4, 2014 4:00 PM ✅Answered
Just to point out about multihomed DCs, here's why, what to expect, and how to configure one, if this is the scenario.
Multihomed DCs (with more than one unteamed NIC or multiple IPs) with DNS, RRAS, iSCSI, Clustering interfaces, management interfaces, backup interfaces, and/or PPPoE adapters - A multihomed DC is not a recommended configuration, however there are ways to configure a DC with registry mods:
http://msmvps.com/blogs/acefekay/archive/2009/08/17/multihomed-dcs-with-dns-rras-and-or-pppoe-adapters.aspx
Good thread discussion on multihoming, and note, to implement NAT, you would need RRAS on the DC, essentially making it multihomed.
RRAS Role on a Single NIC 2008 R2 DC
http://social.technet.microsoft.com/Forums/en-US/winserverNIS/thread/85d03582-77bd-4c82-a1de-f43356ba90ba
Active Directory communication fails on multihomed domain controllers
http://support.microsoft.com/kb/272294/
Symptoms of multihomed browsers
http://support.microsoft.com/kb/191611
Ace Fekay
MVP, MCT, MCSE 2012, MCITP EA & MCTS Windows 2008/R2, Exchange 2013, 2010 EA & 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer
Microsoft MVP - Directory Services
Complete List of Technical Blogs: http://www.delawarecountycomputerconsulting.com/technicalblogs.php
This posting is provided AS-IS with no warranties or guarantees and confers no rights.
Monday, February 3, 2014 2:48 PM
Gateway and DHCP server with same IP addresses is a nice convenience because we don’t have to concern about configuring the network settings on all of the devices on your network; the DCHP server does it for us