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DHCP pool for VLAN in Cata. 6509 Switch

By anshudhamija ·
We need to define DHCP Pool for each VLAN on Catalyst 6509 Switch. On Access Layer, we are using Catalyst 3548's switch. Users are coming to access layer to be a part of departmental VLAN's. We want they must take IP from their VLAN. How this can bedone, please suggest

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DHCP pool for VLAN in Cata 6509 Switch

by cm1ll3r In reply to DHCP pool for VLAN in Cat ...

First off are your users in different VLANs across your network. If they are do you have some sort of router to route traffic between VLANs? If not then there should be nothing you need to do as far as configuration on the switches other than makingsure that all ports on your network belong to the default VLAN or that the VLAN you have created has all ports members of that created VLAN. If you are running different VLANs and you have a router that supports ISL or DOT1Q trunking you will need to make sure that there is a interface configured in each vlan that will handle routing. Also on each of the interfaces handling inter-vlan routing other than the one the DHCP server lives off of you will need to add the following command.
ip helper-address X.X.X.X
where x.x.x.x is the IP address of the DHCP server. This allows the DHCP to receive the requests for a lease from different networks. Since a request is a broadcast and broadcasts dont cross a routed link by default. Also make sure you create a scope for each of the different subnets you are using within each VLAN. Good luck and if any questions send an email. cm1ll3r@qwest.net

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