Solved

DHCP relaY

Posted on 2008-06-17
2
676 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
2 Comments
 
LVL 26

Accepted Solution

by:
jar3817 earned 250 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 250 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

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Ever wondered why you had to use DHCP options (dhcp opt 60, 66 or 67) in order to use PXE? Well, you don't!
BIND is the most widely used Name Server. A Name Server is the one that translates a site name to it's IP address. There is a new bug in BIND (https://kb.isc.org/article/AA-01272), affecting all versions of BIND 9 from BIND 9.1.0 (inclusive) thro…
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…
This video demonstrates how to create an example email signature rule for a department in a company using CodeTwo Exchange Rules. The signature will be inserted beneath users' latest emails in conversations and will be displayed in users' Sent Items…

760 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

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now