The TOR VLT consists of two switches providing a logical single switch view to the connected devices. However, each of the VLT peers maintains separate control and data planes that can be configured individually for a port, protocol, and management behaviors. A VLT domain includes the VLT peer devices, and VLT Interconnect (VLTi). The VLTi is the link between the VLT peer switches and is used to synchronize operating states. The VLT domain is also the configuration mode that you must use to assign VLT global parameters.
By default, VLTi ports are set to a maximum MTU value, 9216 and uses a reserved VLAN (VLAN 4094). For the VLTi link, once the discovery interfaces are configured on both nodes, reserved port channel 1000 is automatically configured, mapping the physical discovery interfaces.
Dell Technologies recommends using high-bandwidth ports for peer-link connections. MAC, ARP, IPv6 neighbors learned over VLANs on VLT peer nodes synchronize using the VLTi. For additional information, see the Dell SmartFabric OS10 VLT document.