300-170 · Question #148
Which offer is selected when a Cisco Nexus Series switch multiple DHCP offers during the POAP DHCP discover phase?
The correct answer is C. An offer is selected randomly. When a Cisco Nexus Series switch receives multiple DHCP offers during the POAP DHCP discover phase, it selects one of these offers randomly.
Question
Which offer is selected when a Cisco Nexus Series switch multiple DHCP offers during the POAP DHCP discover phase?
Options
- AThe offer has the highest TFTP server IP address is selected
- BThe first offer is selected
- CAn offer is selected randomly
- DThe offer has the lowest TFTP server IP address is selected.
How the community answered
(43 responses)- A2% (1)
- B7% (3)
- C86% (37)
- D5% (2)
Why each option
When a Cisco Nexus Series switch receives multiple DHCP offers during the POAP DHCP discover phase, it selects one of these offers randomly.
The POAP process does not use the highest TFTP server IP address as a criterion for selecting a DHCP offer; the selection is random.
The switch does not simply choose the first DHCP offer it receives; instead, it implements a random selection mechanism among the available offers.
During the Power On Auto Provisioning (POAP) process, if a Cisco Nexus switch sends a DHCP discover request and subsequently receives multiple DHCP offer messages, it is designed to randomly select one of these offers. This random selection helps in distributing load among multiple POAP servers and prevents bias towards a specific server.
The POAP process does not use the lowest TFTP server IP address as a criterion for selecting a DHCP offer; the selection is random.
Concept tested: POAP DHCP offer selection
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/fundamentals/configuration/guide/b_Cisco_Nexus_9000_Series_NX-OS_Fundamentals_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_Fundamentals_Configuration_Guide_7x_chapter_010.html
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