I have one DHCP server connect to the cisco switch. Port # 47 connect to DHCP server. Port # 48 connect to Dsl modem, Port # 1 to Port # 46 this ports for employees
How to configuration the switch ?
find below photo
All pc should be also in the same VLAN of DHCP server.
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If all your PCs are in the same subnet as the DHCP server, you don't need a helper address. The DHCP should assign IPs to hosts (as long as you have the correct scope configured on the DHCP server).