CHAPTER 14
Configuring DHCP
This chapter describes how to configure the Dynamic Host Configuration Protocol (DHCP) on a Cisco NX-OS
device.
This chapter includes the following sections:
• About DHCP Snooping, on page 327
• About the DHCP Relay Agent, on page 331
• About the DHCPv6 Relay Agent, on page 334
• About DHCP Client, on page 334
• Licensing Requirements for DHCP, on page 335
• Prerequisites for DHCP, on page 335
• Guidelines and Limitations for DHCP, on page 335
• Default Settings for DHCP, on page 336
• Configuring DHCP, on page 337
• Configuring DHCPv6, on page 356
• Enabling DHCP Client, on page 362
• Verifying the DHCP Configuration, on page 364
• Displaying IPv6 RA Guard Statistics, on page 364
• Displaying DHCP Snooping Bindings, on page 364
• Clearing the DHCP Snooping Binding Database, on page 365
• Monitoring DHCP, on page 365
• Clearing DHCP Snooping Statistics, on page 365
• Clearing DHCP Relay Statistics, on page 365
• Clearing DHCPv6 Relay Statistics, on page 365
• Configuration Examples for DHCP, on page 366
• Configuration Examples for DHCP Client, on page 366
• Additional References for DHCP, on page 367
About DHCP Snooping
DHCP snooping acts like a firewall between untrusted hosts and trusted DHCP servers. DHCP snooping
performs the following activities:
• Validates DHCP messages received from untrusted sources and filters out invalid messages.
Cisco Nexus 9000 Series NX-OS Security Configuration Guide, Release 9.x
327
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