DvR Leaf nodes are typically data center top of the rack (TOR) Fabric switches that aggregate physical and virtual servers or storage devices. DvR Leaf nodes operate in a reduced configuration mode, where Layer 3 is not configured locally, but pushed to them from the DvR Controller(s) within the domain. You need to configure only the IS-IS infrastructure and the Layer 2 VSNs on the Leaf nodes.
A DvR Leaf node also monitors local host attachments and communicates updates about the current state of those host attachments to the DvR domain. All DvR nodes exchange host attachment information using the DvR host distribution protocol, which leverages a DvR domain I-SID.
DvR leaf nodes are managed in-band through a local loopback address, which is exchanged using the IP Shortcut protocol.