Using ip helper-address on a vlan with two subnets

5 pts.
Tags:
Cisco
DHCP
ip helper-address
Routers
Subnets
VLAN
I am trying to get ip helper-address to be able to pull DHCP addresses from a super scope. Right now it will only pull from the subscope that matches the subnet of the primary subnet for the vlan. Does anyone know of a way around this? Or if there would be an adverse affect on the current DHCP leases if I switch the primary subnets on the vlan?

Answer Wiki

Thanks. We'll let you know when a new response is added.

A superscope does not work in this manner. It will only hand out addresses in one range until it is depleted and then start on the next range. You will need to create separate scopes for each VLAN for this to work. I understand your frustration but this is how Microsoft DHCP works. I had the same issue and had to make the changes I recommend above. I would also recommend that you review <a href=”http://itknowledgeexchange.techtarget.com/itanswers/problem-with-vlan-dhcp-wrong-subnet-ip-address/”>this previous posting</a>.

Discuss This Question:  

 
There was an error processing your information. Please try again later.
Thanks. We'll let you know when a new response is added.
Send me notifications when members answer or reply to this question.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to:

To follow this tag...

There was an error processing your information. Please try again later.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Thanks! We'll email you when relevant content is added and updated.

Following