?
Solved

DHCP relaY

Posted on 2008-06-17
2
Medium Priority
?
683 Views
Last Modified: 2012-04-15
We have layer 3 switch with 3 subnets and just migrated DHCP server. Where should we change DHCP relay setting so that other subnets would see DHCP server
0
Comment
Question by:leop1212
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 26

Accepted Solution

by:
jar3817 earned 1000 total points
ID: 21802409
Depends on your switches. Is your layer 3 switch at the core a cisco switch? If so, you have to update the "ip helper address" in each of the 3 vlans.
0
 
LVL 2

Assisted Solution

by:grahammj
grahammj earned 1000 total points
ID: 21802433
I assume you are running VLANs, so you would need to put your helper address on the layer 3 switch for each VLAN.  If not running VLANs then the helper address would need to be on each subnet's router.

For Cisco here is what you do:

enable
config t
int vlan1
ip helper-address x.x.x.x (your DCHP server)
exit
int vlan2 (or whatever the name of the vlan is)
ip helper-address x.x.x.x
exit
int vlan3 (or whatever the name is)
ip helper-address x.x.x.x
exit
exit
write

And you should be good.
0

Featured Post

Ransomware Attacks Keeping You Up at Night?

Will your organization be ransomware's next victim?  The good news is that these attacks are predicable and therefore preventable. Learn more about how you can  stop a ransomware attacks before encryption takes place with our Ransomware Prevention Kit!

Question has a verified solution.

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

I've written instructions for one router type, but this principle may be useful for others of the same brand and even other brands of router. Problem: I had an issue especially with mobile devices that refused to use DNS information supplied via…
Configuring network clients can be a chore, especially if there are a large number of them or a lot of itinerant users.  DHCP dynamically manages this process, much to the relief of users and administrators alike!
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.
Suggested Courses

764 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