Reduced configuration errors and elimination of First Hop Redundancy Protocols (FHRP), such as Hot Standby Routing Protocol (HSRP), GLBP and VRRP.Better return on existing investments via increased bandwidth from access layer.Non-stop business communication through the use of a redundant chassis with SSO-enabled supervisors.Reduced risk associated with a looped topology.Key business benefits of the SVL include the following: In addition, StackWise Virtual also incorporates many other Cisco innovations-such as Stateful Switch Over (SSO), Non-Stop Forwarding (NSF) and Multi-chassis EtherChannel (MEC)-that enable non-stop communication with increased bandwidth to substantially enhance application response time Thus, the spanning-tree domain treats the StackWise Virtual pair as one bridge node instead of two. One of the most significant changes is that StackWise Virtual enables the creation of a loop-free topology because the two switches operate as one. This virtualization of the two-physical switches into single logical switch fundamentally alters the design of campus topology. This paper explains the Cisco StackWise Virtual technology, including its benefits and requirements.Ĭisco Catalyst 9000 platform StackWise Virtual: An overview StackWise Virtual physical to logical representation

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