300-320 · Question #500
What protocol is used for connectivity between VSS layers?
The correct answer is D. VSL. VSS (Virtual Switching System) uses VSL (Virtual Switch Link) for connectivity between the two physical chassis that form the virtual switch. The VSL carries both control-plane traffic (synchronizing configuration, routing tables, MAC tables, etc.) and data-plane traffic…
Question
What protocol is used for connectivity between VSS layers?
Options
- APAgP
- BIVR
- CISL
- DVSL
How the community answered
(35 responses)- A3% (1)
- C3% (1)
- D94% (33)
Explanation
VSS (Virtual Switching System) uses VSL (Virtual Switch Link) for connectivity between the two physical chassis that form the virtual switch. The VSL carries both control-plane traffic (synchronizing configuration, routing tables, MAC tables, etc.) and data-plane traffic between the two chassis. VSL links are typically 10GE ports bundled as an EtherChannel. PAgP is a Cisco port-aggregation protocol, ISL is a legacy VLAN trunking protocol, and IVR is an Inter-VLAN Routing concept - none of these describe VSS inter-chassis communication.
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