Two Cisco switches with 1 SUP and many 10G line-card ports for each switch, run in VSS mode. Why don't connect all VSL to SUP (Choose 1)

The correct answer is A. The SUP diversity. In a VSS (Virtual Switching System), the VSL (Virtual Switch Link) should be distributed across multiple line cards rather than concentrated entirely on the Supervisor (SUP). The reason is SUP diversity - if all VSL connections terminate on the SUP and the SUP fails or is…

Advanced Enterprise Campus Networks

Question

Options

AThe SUP diversity...
BBandwidth congestion at SUP
CPending
DQos must be configured on both

How the community answered

(63 responses)

A
83% (52)
B
3% (2)
C
10% (6)
D
5% (3)

Explanation

In a VSS (Virtual Switching System), the VSL (Virtual Switch Link) should be distributed across multiple line cards rather than concentrated entirely on the Supervisor (SUP). The reason is SUP diversity - if all VSL connections terminate on the SUP and the SUP fails or is replaced, all VSL connectivity is lost simultaneously, breaking the VSS. By spreading VSL ports across different line cards (and optionally the SUP), you achieve hardware diversity so that no single component failure can take down all VSL links. This is a fundamental design principle: never put all VSL links on a single module, especially the SUP, which is itself a single point of failure.

Topics

#VSS#VSL design#SUP diversity#chassis redundancy

Community Discussion

No community discussion yet for this question.

Full 300-320 Practice