Examkin

Soru

Zorluk: OrtaLayer 2 Discovery Protocols (CDP and LLDP)

A network administrator is troubleshooting neighbor discovery on a Cisco Catalyst switch connected to a multi-vendor IP phone on interface GigabitEthernet1/0/5. Global LLDP has already been enabled with the `lldp run` command. However, output from `show lldp neighbors` indicates that while the switch successfully processes incoming packets from the IP phone, the IP phone is not receiving any LLDP advertisements from the switch.

Which interface configuration command must be applied under interface GigabitEthernet1/0/5 to resolve this issue and allow the switch to send LLDP frames to the phone?

  1. lldp transmitCevap
  2. B
    lldp enable
  3. C
    lldp run
  4. D
    cdp enable

Cevap

The command 'lldp transmit' must be configured under interface GigabitEthernet1/0/5 to allow outbound LLDP advertisements.
The correct answer specifies 'lldp transmit'. Unlike Cisco Discovery Protocol (CDP), which uses a single interface command ('cdp enable'), Link Layer Discovery Protocol (LLDP) provides granular directional control on interfaces. The 'lldp transmit' interface submode command explicitly instructs the Cisco switch port to generate and send outbound LLDP frames to adjacent devices.

Adım Adım Çözüm

1
Identify the protocol and scope required
The target protocol is LLDP (IEEE 802.1AB) operating at the interface level on a Cisco Catalyst switch.
Global LLDP is active, but outbound transmission on GigabitEthernet1/0/5 is currently disabled or missing.
2
Differentiate CDP and LLDP interface command syntax
CDP uses 'cdp enable' on interfaces, whereas LLDP uses separate direction-specific submode commands: 'lldp transmit' and 'lldp receive'.
LLDP allows directional control over transmission and reception per port.
3
Select the correct directional interface submode command
Applying 'lldp transmit' enables outbound advertisement of local switch Type-Length-Value (TLV) attributes.
The issue specifically states that incoming packets are received but outbound packets are not being sent.

Anahtar Kavram

LLDP Interface Configuration Commands
Tahmini Süre:1m 0s
Bu soruyu puanla

Konular

Layer 2 Discovery Protocols (CDP and LLDP)

Bu konudan daha fazla soru