[Solved] Proxmox 6.3 DHCP Error on Huawei RH2288 V3 Servers: No Working Lease in Persistent Database

When booting the Proxmox VE 6.x installer on enterprise Huawei FusionServer RH2288 V3 rack servers, the graphical installation aborts and drops into a debug shell with the error: No working lease in persistent database.

Root Cause: Kernel framebuffer conflict with Huawei integrated server graphics (BMC) and IOMMU initialization.

Step-by-Step Resolution

1. At the Proxmox GRUB boot menu, press e to edit the boot entry.
2. Locate the linux kernel line and append the following kernel parameters:

   modprobe.blacklist=nouveau amd_iommu=on video=efifb:off

3. Press Ctrl+X or F10 to boot.

Assigning Static IP in Debug Shell (If DHCP is Unavailable)

If your datacenter environment does not offer DHCP on the management network, configure network parameters directly in the debug prompt:

ip addr add 192.168.1.50/24 dev enp2s0f0
ip route add default via 192.168.1.1 dev enp2s0f0
echo "nameserver 1.1.1.1" > /etc/resolv.conf