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EdgeNetworkingNetworking Overview

Networking Overview

Gallium Edge networking has two parts: network adapters, the physical ports on the server, and networks, which virtual machines attach to.

Networks

Networks are what a virtual machine’s interface connects to. The Networks tab lists every network on the hypervisor, and each is one of three types:

  • Untagged: created automatically for every adapter. Traffic from a virtual machine on this network leaves the port without a VLAN tag.
  • VLAN: a network you add on top of an adapter, carrying an 802.1q tag between 2 and 4094. The tag must match the VLAN configuration on the switch port the adapter is connected to.
  • NAT: a single built-in network that hides virtual machines behind the hypervisor’s own address for outbound connectivity. It has no adapter, cannot be changed, and its subnet is unique to each hypervisor within an organization. Inbound TCP connections can reach a virtual machine through a service gateway.

Untagged and VLAN networks can be renamed. Only a VLAN network can be deleted. See Managing Networks.

Network Adapters

A network adapter is a physical NIC. Edge discovers every adapter in the server and lists it on the hypervisor’s Network Adapters tab by MAC address.

MTU

The maximum transmission unit is set on the adapter and applies to every network on it. Raise it above 1500 only when every device in the path, including your switches, is configured for jumbo frames.

Network Interface

A network interface is the virtual device that a virtual machine uses to connect to a network.

Hypervisor-to-Console Connectivity

To stay reachable from the Gallium Console, the hypervisor requests an address over DHCP on every adapter. Because it maintains connectivity on every adapter at once, it fails over automatically if the connection the Console is using drops. Where DHCP is not available, give an adapter a fixed address by setting a static IP.

SSL WhitelistingManaging Networks