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200-150 · Question #45

A network engineer is verifying Layer 2 connectivity of a server to a Cisco Nexus switch by checking the Address Resolution table statistics. Which command shows the MAC address, physical…

The correct answer is C. show Ip arp detail. The 'show ip arp detail' command on a Cisco Nexus switch displays the full ARP table including IP address, MAC address, physical interface, and VLAN information.

Cisco Data Center Networking Technologies

Question

A network engineer is verifying Layer 2 connectivity of a server to a Cisco Nexus switch by checking the Address Resolution table statistics. Which command shows the MAC address, physical interfaced, VLAN and IP address of a server on a Cisco Nexus switch?

Options

  • Ashow Ip arp interface
  • Bshow Ip arp
  • Cshow Ip arp detail
  • Dshow arp detail

How the community answered

(22 responses)
  • A
    5% (1)
  • C
    91% (20)
  • D
    5% (1)

Why each option

The 'show ip arp detail' command on a Cisco Nexus switch displays the full ARP table including IP address, MAC address, physical interface, and VLAN information.

Ashow Ip arp interface

'show ip arp interface' filters ARP entries by a specific interface but does not add VLAN information to the output.

Bshow Ip arp

'show ip arp' displays the standard ARP table with IP, age, MAC, and interface but omits the VLAN column.

Cshow Ip arp detailCorrect

The 'show ip arp detail' command extends the standard ARP output by adding the VLAN field alongside the IP address, MAC address, age, and physical interface. This makes it the correct command when Layer 2 connectivity verification requires correlating a server's IP to its MAC, VLAN, and port simultaneously. The 'detail' keyword is what exposes the VLAN column not present in the base 'show ip arp' output.

Dshow arp detail

'show arp detail' is not a valid command syntax on Cisco Nexus switches; the correct prefix is 'show ip arp'.

Concept tested: Cisco Nexus ARP table verification with VLAN detail

Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/commandref/l3/b-cisco-nexus-9000-series-nx-os-unicast-routing-command-reference-93x/b-cisco-nexus-9000-series-nx-os-unicast-routing-command-reference-93x_chapter_010.html

Topics

#ARP#Layer 2 verification#MAC address#Nexus CLI

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