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Zorluk: OrtaVLAN Configuration and Access Port Setup

A network engineer executes the `show interfaces FastEthernet0/10 switchport` command on a Cisco Catalyst switch to verify port settings after assigning it to a departmental network. The partial output displays the following parameters:

Name: Fa0/10
Switchport: Enabled
Administrative Mode: dynamic auto
Operational Mode: static access
Access Mode VLAN: 40 (FINANCE)

Which interface configuration command must the engineer enter on FastEthernet0/10 to statically force the interface into access mode and disable Dynamic Trunking Protocol (DTP) negotiation?

  1. switchport mode accessCevap
  2. B
    switchport access vlan 40
  3. C
    switchport trunk native vlan 40
  4. D
    switchport nonegotiate

Cevap

The command 'switchport mode access' statically configures the interface into access mode and disables DTP dynamic trunk negotiation.
The output indicates that the administrative mode is currently 'dynamic auto', meaning the port is dynamically operating in access mode only because the connected neighbor is not actively negotiating a trunk. Executing 'switchport mode access' under interface configuration mode statically forces the interface into access mode, overriding DTP dynamic negotiation.

Adım Adım Çözüm

1
Analyze the CLI output for administrative versus operational state.
The administrative mode is currently set to 'dynamic auto' (default on many Cisco Catalyst switches), while the operational mode is currently operating as 'static access' because the connected endpoint is not attempting DTP negotiation.
An interface in 'dynamic auto' mode is willing to become a trunk if the neighboring device actively requests it (e.g., dynamic desirable or trunk mode).
2
Determine the required CLI command to hardcode static access mode.
Entering interface configuration mode and executing 'switchport mode access' explicitly locks the administrative mode to static access.
Hardcoding access mode turns off DTP negotiation attempts to form a trunk, improving security and port stability.

Anahtar Kavram

Disabling DTP Negotiation and Statically Hardcoding Access Ports
Tahmini Süre:1m 0s
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Konular

VLAN Configuration and Access Port Setup

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