Configure The System To Be A Dhcp Server; Configuring The Server For Automatic Address Allocation - Dell S4048–ON Configuration Manual

you configure IP source address validation on a member port of a virtual local area network (VLAN) and then to apply an access
list to the VLAN, Dell Networking OS displays the first line in the following message. If you first apply an ACL to a VLAN and then
enable IP source address validation on one of its member ports, Dell Networking OS displays the second line in the following
message.
% Error: Vlan member has access-list configured.
% Error: Vlan has an access-list configured.
NOTE: If you enable DHCP Snooping globally and you have any configured L2 ports, any IP ACL, MAC ACL, or DHCP
source address validation ACL does not block DHCP packets.
• Dell Networking OS provides 40000 entries that can be divided between leased addresses and excluded addresses. By
extension, the maximum number of pools you can configure depends on the subnet mask that you give to each pool. For
example, if all pools were configured for a /24 mask, the total would be 40000/253 (approximately 158). If the subnet is
increased, more pools can be configured. The maximum subnet that can be configured for a single pool is /17. Dell Networking
OS displays an error message for configurations that exceed the allocated memory.
• This platform supports 4000 DHCP Snooping entries.
• All platforms support Dynamic ARP Inspection on 16 VLANs per system. For more information, refer to
NOTE: If the DHCP server is on the top of rack (ToR) and the VLTi (ICL) is down due to a failed link, when a VLT node
is rebooted in BMP (Bare Metal Provisioning) mode, it is not able to reach the DHCP server, resulting in BMP failure.

Configure the System to be a DHCP Server

A DHCP server is a network device that has been programmed to provide network configuration parameters to clients upon request.
Servers typically serve many clients, making host management much more organized and efficient.
The following table lists the key responsibilities of DHCP servers.
Table 25. DHCP Server Responsibilities
DHCP Server Responsibilities
Address Storage and Management
Configuration Parameter Storage and Management
Lease Management
Responding To Client Requests
Providing Administration Services

Configuring the Server for Automatic Address Allocation

Automatic address allocation is an address assignment method by which the DHCP server leases an IP address to a client from a
pool of available addresses.
An address pool is a range of IP addresses that the DHCP server may assign. The subnet number indexes the address pools.
To create an address pool, follow these steps.
1. Access the DHCP server CLI context.
CONFIGURATION mode
284
Dynamic Host Configuration Protocol (DHCP)
Description
DHCP servers are the owners of the addresses used by DHCP
clients.The server stores the addresses and manages their use,
keeping track of which addresses have been allocated and which
are still available.
DHCP servers also store and maintain other parameters that are
sent to clients when requested. These parameters specify in
detail how a client is to operate.
DHCP servers use leases to allocate addresses to clients for a
limited time. The DHCP server maintains information about each
of the leases, including lease length.
DHCP servers respond to different types of requests from
clients, primarily, granting, renewing, and terminating leases.
DHCP servers include functionality that allows an administrator
to implement policies that govern how DHCP performs its other
tasks.
Dynamic ARP Inspection.