A customer wants to add a fully populated BladeCenter chassis to their existing core-edge SAN. They have suffered performance issues in the past due to congestion and over- utilization of…

A customer wants to add a fully populated BladeCenter chassis to their existing core-edge SAN. They have suffered performance issues in the past due to congestion and over- utilization of inter-switch links (ISL). The customer has asked what is the best practice guideline concerning ISL oversubscription ratio. Which one of the following ratios does the technical specialist provide?