DHCP Client on a Management InterfaceThese conditions apply when you enable a management interface to operate as a DHCP client.• The management default route is added with the gateway as the router IP address received in theDHCP ACK packet. It is required to send and receive traffic to and from other subnets on the externalnetwork. The route is added irrespective when the DHCP client and server are in the same or differentsubnets. The management default route is deleted if the management IP address is released like otherDHCP client management routes.• ip route for 0.0.0.0 takes precedence if it is present or added later.• Management routes added by a DHCP client display with Route Source as DHCP in the show ipmanagement route and show ip management-route dynamic command output.• Management routes added by DHCP are automatically reinstalled if you configure a static IP routewith the ip route command that replaces a management route added by the DHCP client. If youremove the statically configured IP route using the no ip route command, the management routeis reinstalled. Manually delete management routes added by the DHCP client.• To reinstall management routes added by the DHCP client that is removed or replaced by the samestatically configured management routes, release the DHCP IP address and renew it on themanagement interface.• Management routes added by the DHCP client have higher precedence over the same staticallyconfigured management route. Static routes are not removed from the running configuration if adynamically acquired management route added by the DHCP client overwrites a static managementroute.• Management routes added by the DHCP client are not added to the running configuration.NOTE: Management routes added by the DHCP client include the specific routes to reach a DHCPserver in a different subnet and the management route.DHCP Client Operation with Other FeaturesThe DHCP client operates with other Dell Networking OS features, as the following describes.StackingThe DHCP client daemon runs only on the master unit and handles all DHCP packet transactions. Itperiodically synchronizes the lease file with the standby unit.When a stack failover occurs, the new master requires the same DHCP server-assigned IP address onDHCP client interfaces. The new master reinitiates a DHCP packet transaction by sending a DHCPdiscovery packet on nonbound interfaces.Virtual Link Trunking (VLT)A DHCP client is not supported on VLT interfaces.VLAN and Port ChannelsDHCP client configuration and behavior are the same on Virtual LAN (VLAN) and port-channel (LAG)interfaces as on a physical interface.DHCP SnoopingA DHCP client can run on a switch simultaneously with the DHCP snooping feature as follows:296 Dynamic Host Configuration Protocol (DHCP)
