04-08-2025 11:55 AM
Hi everyone,
I have a vlan no. 33 assigned to a group of users through my network and access the vlan from the core sw to a specific sw, however, i have issue i receive vlan ip with 192.168.1. x instead of 192.168.33.x DHCP
when i unplage the ethernet cable its return to vlan 33 and after a while its return to vlan 1? the issue with the same PC every time.
interface x
switchport access vlan 33
switchport mode access
04-08-2025 01:47 PM
@obeidahmed Check your DHCP server to see if this PC's MAC address is bound to that IP Reservation.
Also if you have dot1x configured on your switchport, worth checking the cisco ISE policy applied to that specific port. But as you mentioned, always this occurs for that PC, i would check the dhcp allocations /bindings against this PC mac address.
04-09-2025 12:35 AM
No DHCP helper on the VLAN 33 SVI, causing DHCP requests to broadcast in VLAN 1.
interface Vlan33
ip address 192.168.33.1 255.255.255.0
ip helper-address 192.168.100.10 ( There must be with DHCP server IP)
Also be sure that you have DHCP scope for vlan 33
Thanks!
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