DHCP Network Interface for VM

[professorx]

Hi,

I'm having some trouble configuring the DHCP network interface with Proxmox VMs.
Here is my network setup.

Baremetal Server comes with ESXi 7 with one network interface (promiscuous mode enabled for vSwitch0).
Here, I create two VMs. One pfSense 2.7.2 and Proxmox 8.1-2

ESXi Has two port groups named Public and Private.
Both port groups are attached with pfSense and Proxmox. Later proxmox was configured with a Static Public IP address, like following

auto lo
iface lo inet loopback


iface ens192 inet manual


iface ens224 inet manual


auto vmbr0
iface vmbr0 inet static
        address XXX.YYY.ZZZ.92/29
        gateway XXX.YYY.ZZZ.89
        bridge-ports ens192
        bridge-stp off
        bridge-fd 0
#Public Network

auto vmbr1
iface vmbr1 inet manual
        bridge-ports ens224
        bridge-stp off
        bridge-fd 0
#pfSense DHCP LAN

Here ens224 is basically a LAN of pfSense, and ens192 is the public network port group.
Now, I am able to get public IP to Proxmox Host, and if I attach only the DHCP interface, it gets the DHCP IP address from pfSense.
However, when I attach the same DHCP interface with any VM, it never gets any DHCP IP.

I also tested with the following configuration, but no luck.

auto vmbr1
iface vmbr1 inet dhcp
        bridge-ports ens224
        bridge-stp off
        bridge-fd 0
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
#pfSense DHCP LAN

I wonder what the issues could be.