A host client on VLAN 10 requests an IPv4 address assignment from a centralized DHCP server located across a Cisco router acting as a DHCP relay agent. Arrange the operational steps of the initial address discovery process in the correct chronological sequence.
- 1The host client broadcasts a DHCPDISCOVER message on the local VLAN 10 segment.
- 2The relay agent receives the broadcast, populates the giaddr field with its local ingress interface IPv4 address, and unicasts the DHCPDISCOVER message to the central DHCP server.
- 3The DHCP server matches the giaddr field to an IP address pool, allocates an available address, and sends a unicast DHCPOFFER message to the relay agent.
- 4The relay agent receives the unicast DHCPOFFER and forwards the message out to the client on VLAN 10.
Cevap
The operational sequence begins with the host broadcasting a DHCPDISCOVER message on the local segment. Next, the relay agent populates the giaddr field with its ingress interface IPv4 address and unicasts the request to the central DHCP server. The DHCP server uses giaddr to select the correct IP pool and returns a unicast DHCPOFFER to the relay agent. Finally, the relay agent forwards the DHCPOFFER back onto the client subnet.
The sequence follows standard DHCP relay agent behavior: first the host broadcasts a DHCPDISCOVER on VLAN 10, then the relay agent populates the giaddr field with its local ingress IP and unicasts the packet to the DHCP server. The DHCP server uses giaddr to select the appropriate address pool and returns a unicast DHCPOFFER to the relay agent. Finally, the relay agent forwards the DHCPOFFER out to the host on VLAN 10.
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Anahtar Kavram
DHCP Relay Agent Operation and giaddr Population
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