Problem with changing hardware address on proxmox 6.0


Aug 9, 2019
I just installed Proxmox VE 6.0 on my HP Workstation
Internet acces come from my provider throught GPON terminal. there is my 2 problems:
1. I have one public static IP address, that i get over DHCP protocol, locked to my MAC address, but Proxmox installation have not option to choose dhcp, only static address, i typed someone ip 192.168....... to complete installation
2. On my internet provider is recorded another MAC from my old server, and i need to change address ot new PC to get internet access.

I edited file /etc/network interfaces this way:

auto lo
iface lo inet loopback

iface enp3s0f2 inet manual

auto vmbr0
iface vmbr0 inet dhcp
hwaddress ether e4:12:58:e3:49:fe (this is mac from old pc)
bridge_ports enp3s0f2
bridge_stp off
bridge_fd 0

but i can not receive ip address from internet provider, and i get every time after reboot ip 192.168... that typed at installation, even though I deleted it from interfaces.

Where is my mistake?

Thanks in advance.
Can you please post the output from `ifconfig` you may have to force your mac on to the bridged interface.
ifconfig command not found, i used "ip a" and get 2 interfaces - 1 enp3s0f2 that mac`s not changed, and 2 vmbr0 that mac`s is changed to old.

I will post all outputs tomorrow because the server is not with me now and I do not have access to the network.
This is the output from ip a command:
Last login: Fri Aug 9 17:05:36 EEST 2019 on pts/0
Linux mig29 5.0.15-1-pve #1 SMP PVE 5.0.15-1 (Wed, 03 Jul 2019 10:51:57 +0200) x86_64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
root@mig29:~# ifconfig
-bash: ifconfig: command not found
root@mig29:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
link/ether d0:bf:9c:57:d8:47 brd ff:ff:ff:ff:ff:ff
3: wlo1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether c4:d9:87:26:02:5f brd ff:ff:ff:ff:ff:ff
4: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether aa:bb:00:12:34:63 brd ff:ff:ff:ff:ff:ff
inet brd scope global dynamic vmbr0
valid_lft 85682sec preferred_lft 85682sec
inet6 fe80::a8bb:ff:fe12:3463/64 scope link
valid_lft forever preferred_lft forever


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