We must not indicate the gateway, we must manually modify the routing table use ip route 2. Post-down ip rule del from 192.168.2.0/24 table vlan53 Post-down ip route del table vlan53 default via 192.168.2.250 dev vmbr1 Post-up ip route add table vlan53 default via 192.168.2.250 dev vmbr1 Now we create manually the second bridge. We can use direct the NIC dot VLAN ID, like bond0.53 If you're using a bond of multiple links, you need to tell this to your switch and put the switch ports in a Link Aggregation Group or Trunk. We want separate these network at layer 2įirst of all we create the bond0 (switch assisted 802.3ad) at the proxmox web interface, follow the video.Īt the end we have a /etc/network/interface like this:Ĭonfigure your switch appropriately. We use two network: one untagged 192.168.1.0/24 and one tagged (VLanID=53) 192.168.2.0/24, we must configure the switch with port vlan. Another host (firewall) manage the routing and rule to access to these VMs (out of this doc). 
Have two separate network on the same NIC. Post-down iptables -t nat -D POSTROUTING -s '10.10.10.0/24' -o eth0 -j MASQUERADEįor the simplest way to create VLAN follow the link: VLAN Post-up iptables -t nat -A POSTROUTING -s '10.10.10.0/24' -o eth0 -j MASQUERADE Post-up echo 1 > /proc/sys/net/ipv4/ip_forward In some cases you may want to use private IPs behind your Proxmox host's true IP, and masquerade the traffic using NAT: Post-up echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp For such situations we recommend the following setup: #Proxmox web interface port mac
For security reasons they disable networking as soon as they detect multiple MAC addresses on a single interface.Ī common setup is a public IP (assume 192.168.10.2 for this example), and additional IP blocks for your VMs (10.10.10.1/255.255.255.0). Most hosting providers do not support the above setup. The network, in turn, sees each virtual machine as having its own MAC, even though there is only one network cable connecting all of these VMs to the network. Virtual machine behave as if they were directly connected to the physical network. The installation program creates a single bridge (vmbr0), which is connected to the first ethernet card (eth0).
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