Per Floor Vlan / DHCP

Unanswered Question
Aug 15th, 2008

I've been reading about per floor vlan's and I want to do that. My question is when I use Vlan 100 for the first floor and vlan 200 on the second floor in a different subnet I guess I need a seperate DHCP pool for each subnet?

Thanks

Donnie

I have this problem too.
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JORGE RODRIGUEZ Fri, 08/15/2008 - 12:56

Donnie, you have the correct idea, if you create VLAN100 for the switch say in floor-1 you create SVI in tour code switch, assume VLAN100 for floor-1 is 10.10.10.0/24 then you would need a DHCP pool for that subnet and configure ip-helper address in SVI interface for vlan100, repeat the process for VLAN200 etc..

Rgds

Jorge

Giuseppe Larosa Fri, 08/15/2008 - 12:57

Hello Donnie,

your understanding is correct you need a separate DHCP scope/pool for each IP subnet/Vlan.

We do so and it works well at some remote sites.

If using an external DHCP you will need ip helper-address x.x.x.x under each SVI L3 Vlan configuration instead of defining the DHCP pool.

Hope to help

Giuseppe

HoustonG33K Fri, 08/15/2008 - 13:07

Thank you both! Thats what I thought. I work for an engineering firm that uses huge CAD drawings and the network has been limping bad. I thought by per floor vlans i could speed things up a little bit.

Thanks again!

Donnie

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