Single Server serving Multiple VLANs
|
Each DHCP-enabled VLAN interface initiates DHCPDISCOVER message, receives DHCPOFFER from the server, and send DHCPREQUEST to obtain the offered parameters.
If multiple interfaces send DHCPREQUESTs, it is possible that more than one DHCPACK is returned with a valid Option 66.
Evaluating and updating the configuration file occurs only on the primary VLAN.
Option 66 is ignored by any interfaces not belonging to the primary VLAN.
|
Multiple Servers serving a Single VLAN
|
Each DHCP-enabled VLAN interface initiates one DHCPDISCOVER and receives one or more DHCPOFFER messages.
Each interface accepts the best offer.
Option 66 is processed only for the interface belonging to the primary VLAN.
|
Multiple Servers serving Multiple VLANs
|
Each DHSP-enabled VLAN interface initiates DHCPDISCOVER and receives one or more DHCPOFFER messages.
Each interface accepts the best offer.
Option 66 is processed only for the interface belonging to the primary VLAN.
|
Multi-homed Server serving Multiple VLANs
|
The switch perceives the multi-homed server as multiple separate servers.
Each DHCP-enabled VLAN interface initiates DHCPDISCOVER and receives one DHCPOFFER message.
Each interface accepts the offer.
Option 66 is processed only for the interface belonging to the primary VLAN.
|