300-320 · Question #440
When you configure a multichassis setup with VSS, which link must be configured to extend the backplane between the two switches?
The correct answer is A. VSL. In a Cisco Virtual Switching System (VSS), the Virtual Switch Link (VSL) is the special inter-chassis link that logically connects the two physical switches into a single virtual switch. The VSL carries control plane traffic (including VSS protocols and IPC messages) as well as…
Question
When you configure a multichassis setup with VSS, which link must be configured to extend the backplane between the two switches?
Options
- AVSL
- BLCAP
- CPaGP
- DISL
How the community answered
(22 responses)- A86% (19)
- B9% (2)
- D5% (1)
Explanation
In a Cisco Virtual Switching System (VSS), the Virtual Switch Link (VSL) is the special inter-chassis link that logically connects the two physical switches into a single virtual switch. The VSL carries control plane traffic (including VSS protocols and IPC messages) as well as data plane traffic that must cross between chassis. It is what allows the two switches to present a single management plane, single IP address, and single routing instance. LCAP is not a valid Cisco acronym in this context. PAgP (Port Aggregation Protocol) is a Cisco EtherChannel negotiation protocol. ISL (Inter-Switch Link) is a legacy Cisco VLAN trunking encapsulation, not an VSS interconnect technology.
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