Glossary

Rapid Per-VLAN
Spanning-Tree
(Rapid-PVST)
A protocol that is a combination of rapid spanning-tree (RSTP) and per-VLAN spanning-tree plus
(PVST+) for faster convergence and interoperability.
Rapid Spanning-
Tree Protocol
(RSTP)
A protocol that provides faster convergence and interoperability with devices that are configured with the
Spanning-Tree Protocol (STP) and Multiple Spanning-Tree Protocol (MSTP).
RDMA over
Converged
Ethernet (RoCE)
A protocol that allows remote direct memory access over an Ethernet network.
Real-Time Clock
(RTA)
A system clock that keeps track of the current time.
Remote Direct
Memory Access
(RDMA)
A technology that enables memory transfers between two systems in a network without involving the
CPU of either of the systems.
Remote Port
Monitoring
(RPM)
A process where port monitoring is done on traffic running across a remote device in the same network.
Rendezvous
Point (RP)
A single root node of a shared multicast distribution tree.
Reverse Path
Forwarding
(RPF)
The path that the router uses to reach the RP or the multicast source.
Role-Based
Access Control
(RBAC)
A method of restricting system access to authorized users based on the roles of individual users.
Route leaking A process that enables routes that are configured in a default or nondefault VRF instance to be made
available to another VRF instance.
Route reflectors A device that reorganizes the Internal Border Gateway Protocol iBGP core into a hierarchy and allow
route advertisement rules. Route reflection divides iBGP peers into two groups: client peers and nonclient
peers.
Routing table A routing information base or database-type object that is stored in a switch with routes to particular
network destinations.
RTAG7 A hash algorithm that load-balances traffic within a trunk group in a controlled manner.
S
SDN controller
An application that communicates with the business logic applications and network devices such as
switches.
Secure boot A feature that verifies the authenticity and integrity of the OS10 image. This feature protects a system
from malicious code being loaded and started during the boot process.
Sensor group A reusable group of multiple sensor paths and exclude filters.
Sensor path The path used to collect data for streaming telemetry.
sFlow A standard-based sampling technology that is embedded within switches and routers to monitor network
traffic.
Simple Network
Management
Protocol (SNMP)
A protocol that provides a messaging format for communication between SNMP managers and agents.
SNMP provides a standardized framework and common language for network monitoring and device
management.
SmartFabric
Director (SFD)
A network orchestration solution that manages the switches in a data center with or without any virtual
infrastructure.
SmartFabric
Services (SFS)
An application suite that provides network fabric automation and API-based programmability.
12 Glossary of Terms