JN0-351: Enterprise Routing and Switching, Specialist (JNCIS-ENT)Demo

By Juniper · Question Mode

QuestionQ80

Layer 2 Switching/VLANs

A host connects to your EX Series switch through an interface that has persistent MAC learning enabled. When you move the host to a different interface on the same switch, all traffic the host generates is dropped.

Which action should you take to resolve the issue?

  • A Configure the interface as a trunk port.
  • B Enter the clear dhcp snooping database command.
  • C Enter the clear ethernet switching table persistent learning command.
  • D Disable dynamic ARP inspection.
Explanation

Persistent MAC learning preserves the host MAC address on the original switch interface. When the host is moved without clearing that entry, the new interface cannot learn the MAC address and the host cannot connect. Clear the persistent MAC-learning entry with clear ethernet-switching table persistent-learning.

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