Dell PowerEdge FX2 Deployment Manual page 92

ToR (Top of Rack): A ToR switch is a switch that is positioned at the top of a server rack in a data
center.
SSH (Secure Shell): Permits a user to log in to another computer over a network, execute commands
on a remote machine and move files from one machine to another. Secure Shell provides strong
authentication and secure communications methods over insecure channels.
Telnet: Terminal Emulation Protocol enables system users to log in and use resources on remote
networks.
vPC: A virtual PortChannel allows links that are physically connected to two different Cisco switches to
appear to be coming from a single device as part of a single port channel to a third downstream
device.
vPC Peer Switches: Two switches connected using a special port channel known as a vPC Peer-
Link.
vPC Peer Link: This port channel is used to synchronize data between the vPC peer devices. The link
carries control traffic between two vPC switches as well as multicast and broadcast data.
vPC Domain: A vPC domain contains both vPC peer switches, the vPC peer keepalive link and all of
the port channels in the vPC connected to the downstream devices. A domain can be assigned with a
value from 1 to 1000.
vPC Peer Keepalive Link: The keepalive link monitors the vitality of a vPC peer switch. This link will
send periodic keepalive messages between vPC peer devices. This link can be part of the
management network, as it does not send data or synchronization traffic, only keepalive messages.
vPC Member Ports: vPC member ports are interfaces that belong to the vPCs.
MVLT: See VLT
VLT: Virtual Link Trunking is a protocol that enables active/active aggregation of Dell Networking OS
based switches providing connections to two switches but appearing as one logical switch to
participating members.
VLT Domain: A VLT domain contains both VLT peer switches, the VLT peer keepalive link and all of
the port channels in the VLT connected to the downstream devices.
VLTi (VLT interconnect): A port channel used to synchronize data between the VLT peer devices.
This link carries control traffic between two VLT switches as well as multicast and broadcast data.
VLT Member Ports: Interfaces that belong to the switches with VLT aggregation configured.
VLT Members: Upstream and downstream switches connected using a special port channel known as
a VLTi Peer-Link.
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