Proxmox networking configuration

I have recently bought a test dedicated server to test proxmox. The installation went smoothly, but i get stuck in the network configuration

I'm given the IP: 192.151.154.146/29

After proxmox installation, the interfaces was

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet static
        address 192.151.154.146
        netmask 255.255.255.248
        network 192.151.154.144
        broadcast 192.151.154.151
        gateway 192.151.154.145
        # dns-* options are implemented by the resolvconf package, if installed
        dns-nameservers 127.0.0.1
        dns-search nocix.net

I followed proxmox tutorial and change the content of the /etc/network/interfaces to

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
        address  192.151.154.146
        netmask  255.255.255.248
        gateway  192.151.154.145
        post-up echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp

auto vmbr0
iface vmbr0 inet static
        address  192.151.154.147
        netmask  255.255.255.0
        bridge_ports none
        bridge_stp off
        bridge_fd 0

My objective is to create a LXC that has address 192.151.154.148. This is the configuration:

LXC creation

This is the interfaces of the created LXC container:

LXC interfaces

Unfortunately the created LXC container cannot connect to internet.

Could any one tell me what i am doing wrongly?

Thanks!