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Zorluk: KolayInterface and Cable Troubleshooting Issues

A network administrator is troubleshooting a router interface that fails to forward traffic. The administrator issues the command `show interfaces gigabitethernet 0/1` and observes the following output status line:

`GigabitEthernet0/1 is administratively down, line protocol is down`

Which action must be taken to enable this interface?

  1. Execute the `no shutdown` command in interface configuration mode.Cevap
  2. B
    Replace the connected straight-through cable with a crossover Ethernet cable.
  3. C
    Reconfigure the native VLAN ID to match the connected switch port.
  4. D
    Verify neighbor status details using the `show cdp neighbors detail` command.

Cevap

Execute the `no shutdown` command in interface configuration mode.
The state 'administratively down' always indicates that the administrator disabled the interface via configuration (`shutdown`). Executing `no shutdown` in interface configuration mode is the direct fix required to enable the port.

Adım Adım Çözüm

1
Analyze the output of `show interfaces gigabitethernet 0/1`.
The physical layer status reports 'administratively down'.
In Cisco IOS, 'administratively down' explicitly indicates an administrative configuration state where the `shutdown` command is present under the interface.
2
Determine the required CLI command to change the administrative state.
Navigating to interface configuration mode (`config-if`) and entering `no shutdown` removes the shutdown state.
The `no shutdown` command administratively enables the interface, allowing it to transition to an operational status.

Anahtar Kavram

Interface Administrative Status vs. Physical/Line Protocol States
Tahmini Süre:45s
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Interface and Cable Troubleshooting Issues

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