Principles of DIS election on a broadcast network on an S series switch

Q: What are the principles of DIS election on a broadcast network?
A: For S series switches supporting IS-IS, the IS where the interface with the highest Designated Intermediate System (DIS) priority resides is elected as the DIS on the same network segment. If interfaces have the same DIS priority, the IS where the interface with the largest MAC address resides is elected as the DIS. The DIS priority of an interfaces can be configured using the isis dis-priority priority-value command. A greater priority value indicates a higher priority.

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