Users Guide

• The S5000 supports 4K DHCP Snooping entries.
• The S5000 supports Dynamic ARP Inspection on 16 VLANs per system. For more information, refer to Dynamic ARP Inspection.
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.
Conguration Tasks
• Congure the System to be a DHCP Server
• Congure the System to be a Relay Agent
• Congure Secure DHCP
Congure the System to be a DHCP Server
A DHCP server is a network device that has been programmed to provide network conguration parameters to clients upon request.
Servers typically serve many clients, making host management much more organized and ecient.
The following table lists the key responsibilities of DHCP servers.
Table 23. DHCP Server Responsibilities
DHCP Server Responsibility Description
Address Storage and Management DHCP servers are the owners of the addresses DHCP clients
uses. The server stores the addresses and manages their use,
keeping track of which addresses have been allocated and which
are still available.
Conguration Parameter Storage and Management 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.
Lease Management 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.
Responding To Client Requests DHCP servers respond to dierent types of requests from
clients, primarily, granting, renewing, and terminating leases.
Providing Administration Services DHCP servers include functionality that allows an administrator
to implement policies that govern how DHCP performs its other
tasks.
Conguration Tasks
To congure DHCP, an administrator must rst set up a DHCP server and provide it with conguration parameters and policy
information including IP address ranges, lease length specications, and conguration data that DHCP hosts need.
Conguring the Dell system to be a DHCP server is a three-step process:
1. Conguring the Server for Automatic Address Allocation
2. Specifying a Default Gateway
3. Enabling the DHCP Server
Related Conguration Tasks
• Congure a Method of Hostname Resolution
• Creating Manual Binding Entries
• Debugging the DHCP Server
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Dynamic Host Conguration Protocol (DHCP)