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VSS Requirements

What do I need to do to make VSS work, I have the following switches with the following IOS, but am not sure if they can do it.

Cisco 6509: s72033-adventerprisek9-mz.151-1.SY

thanks in advance

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Cisco Employee

VSS Requirements


VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual Switching Supervisor 720-10GE. In a VSS, the data plane and switch fabric with capacity of 720 Gbps of supervisor engine in each chassis are active at the same time on both chassis, combining for an active 1400-Gbps switching capacity per VSS. Only one of the virtual switch members has the active control plane. Both chassis are kept in sync with the interchassis Stateful Switchover (SSO) mechanism along with Nonstop Forwarding (NSF) to provide nonstop communication even in the event of failure of one of the member supervisor engines or chassis.

Please find the detalis of Sup/IOS in the below link:

How to configure:

VSS on 4500:




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Super Bronze

Re: VSS Requirements


The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

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For a 6509, you need the right supervisors (VS-S720 or Sup2t), the right line cards (not all line cards are supported, expeically pre 67xx), and a VSS capable IOS.