Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 401

To view the ip helper-address configuration for an interface, use the show ip interface command from EXEC privilege mode. Example of the show ip interface Command R1_E600#show ip int gig 1/3 GigabitEthernet 1/3 is up, line protocol is down Internet address is 10.11.0.1/24 Broadcast address is 10.11.0.255 Address determined by user input IP MTU is 1500 bytes Helper address is 192.168.0.1 192.168.0.2 Directed broadcast forwarding is disabled Proxy ARP is enabled Split Horizon is enabled Poison Reverse is disabled ICMP redirects are not sent ICMP unreachables are not sent Configure the System to be a DHCP Client A DHCP client is a network device that requests an IP address and configuration parameters from a DHCP server. Implement the DHCP client functionality as follows: • The switch can obtain a dynamically assigned IP address from a DHCP server. A start-up configuration is not received. Use bare metal provisioning (BMP) to receive configuration parameters (OS version and a configuration file). BMP is enabled as a factory-default setting on a switch. A switch cannot operate with BMP and as a DHCP client simultaneously. To disable BMP in EXEC mode, use the stop bmp command. After BMP stops, the switch acts as a DHCP client. • Acquire a dynamic IP address from a DHCP client is for a limited period or until the client releases the address. • A DHCP server manages and assigns IP addresses to clients from an address pool stored on the server. For more information, refer to Configuring the Server for Automatic Address Allocation. • Dynamically assigned IP addresses are supported on 10-Gigabit and 40-Gigabit interfaces. The DHCP client is supported on VLAN and port-channel interfaces. • The public out-of-band management interface and default VLAN 1 are configured by default as a DHCP client to acquire a dynamic IP address from a DHCP server. DHCP Client on a Management Interface These 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 the DHCP ACK packet. It is required to send and receive traffic to and from other subnets on the external network. The route is added irrespective when the DHCP client and server are in the same or different subnets. The management default route is deleted if the management IP address is released like other DHCP client management routes. Dynamic Host Configuration Protocol (DHCP) 401