Advanced networking configuration options allow you greater control over your vSphere networking environment. Internet Protocol Version 6 (IPv6) SupportInternet Protocol version 6 (IPv6) support in ESXi provides the ability to use Virtual Infrastructure features such as NFS in an IPv6 environment. Use the Networking Properties dialog box to enable or disable IPv6 support on the host. VLAN ConfigurationVirtual LANs (VLANs) enable a single physical LAN segment to be further isolated so that groups of ports are isolated from one another as if they were on physically different segments. Working With Port MirroringPort mirroring allows you to mirror a distributed port's traffic to other distributed ports or specific physical switch ports. Configure NetFlow SettingsNetFlow is a network analysis tool that you can use to monitor network monitoring and virtual machine traffic. Switch Discovery ProtocolSwitch discovery protocols help vSphere administrators to determine which port of the physical switch is connected to a vSphere standard switch or vSphere distributed switch. Change the DNS and Routing ConfigurationYou can change the DNS server and default gateway information provided during installation from the host configuration page in the vSphere Client. MAC Address ManagementMAC addresses are used in the Layer 2 (Data Link Layer) of the network protocol stack to transmit frames to a recipient. In vSphere, vCenter Server generates MAC addresses for virtual machine adapters and VMkernel adapters, or you can assign addresses manually.