300-320 · Question #169
A campus network in a switch block design requires redundant distribution switches, load sharing across uplinks, a loop-free topology, and only one gateway IP address per VLAN. Which switching…
The correct answer is B. VSS. Virtual Switching System (VSS) combines two physical Catalyst 6500/6800 switches into a single logical switch. Because both chassis share one control plane, active-active load sharing across all uplinks is native (via Multichassis EtherChannel), the topology is loop-free…
Question
A campus network in a switch block design requires redundant distribution switches, load sharing across uplinks, a loop-free topology, and only one gateway IP address per VLAN. Which switching technology meets all of the requirements?
Options
- AHSRP
- BVSS
- CSpanning Tree Protocol
- DEtherChannel
How the community answered
(46 responses)- A4% (2)
- B80% (37)
- C4% (2)
- D11% (5)
Explanation
Virtual Switching System (VSS) combines two physical Catalyst 6500/6800 switches into a single logical switch. Because both chassis share one control plane, active-active load sharing across all uplinks is native (via Multichassis EtherChannel), the topology is loop-free without STP intervention between the VSS members, and only one gateway IP per VLAN is needed because the VSS appears as one device. HSRP provides a virtual gateway IP but only one router is active at a time per VLAN, preventing true active-active load sharing without additional complexity. Spanning Tree Protocol ensures a loop-free topology but blocks redundant paths, sacrificing load sharing. EtherChannel aggregates links on a single switch but does not address multi-chassis redundancy or single-gateway requirements by itself.
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