Which three statements are true about VSS? (Choose three.)
A.
VSS separates the control planes of the active and the standby chassis.
B.
Configuration changes can be made on both active and standby chassis.
C.
When the VSS active chassis recovers after a failure, it initiates a switchover and takes on the
active role again.
D.
VSS unifies the control planes of the active and the standby chassis.
E.
HSRP configuration is not required to run VSS.
F.
The VSS standby chassis monitors the VSS active chassis using the VSL.
VSS operates on a unified control plane with a distributed forwarding architecture in which the
active supervisor (or switch) is responsible for actively participating with the rest of the network
and for managing and maintaining control plane information.
VSS actually removes the need for a next-hop redundancy protocol like HSRP or VRRP. These
first-hop redundancy protocols are usually heavily tied to a fast-converging routing protocol like
EIGRP, and still require that each device maintain it’s own control plane.
The standby chassis monitors the active chassis using the VSL. If it detects failure, the standby
chassis initiates a switchover and takes on the active role. When the failed chassis recovers, it
takes on the standby role.
Reference. http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-
1SY/config_guide/sup2T/15_1_sy_swcg_2T/virtual_switching_systems.pdf
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