Setup Guide

DHCP Packet Format and Options............................................................................................................................. 320
Assign an IP Address using DHCP...............................................................................................................................322
Implementation Information..........................................................................................................................................323
Congure the System to be a DHCP Server..............................................................................................................323
Conguring the Server for Automatic Address Allocation..................................................................................324
Specifying a Default Gateway................................................................................................................................ 325
Congure a Method of Hostname Resolution..................................................................................................... 326
Using DNS for Address Resolution........................................................................................................................326
Using NetBIOS WINS for Address Resolution..................................................................................................... 326
Creating Manual Binding Entries............................................................................................................................326
Debugging the DHCP Server................................................................................................................................. 327
Using DHCP Clear Commands...............................................................................................................................327
Congure the System to be a Relay Agent.................................................................................................................327
Congure the System to be a DHCP Client............................................................................................................... 329
Conguring the DHCP Client System...................................................................................................................329
DHCP Client on a Management Interface.............................................................................................................331
DHCP Client Operation with Other Features........................................................................................................331
DHCP Relay When DHCP Server and Client are in Dierent VRFs........................................................................ 332
Conguring Route Leaking between VRFs on DHCP Relay Agent................................................................... 332
Non-default VRF conguration for DHCPv6 helper address................................................................................... 333
Conguring DHCP relay source interface...................................................................................................................334
Global DHCP relay source IPv4 or IPv6 conguration ....................................................................................... 334
Interface level DHCP relay source IPv4 or IPv6 conguration ..........................................................................334
Congure the System for User Port Stacking (Option 230)....................................................................................336
Congure Secure DHCP...............................................................................................................................................336
Option 82 (DHCPv4 relay options)........................................................................................................................336
DHCPv6 relay agent options.................................................................................................................................. 337
DHCP Snooping....................................................................................................................................................... 337
Drop DHCP Packets on Snooped VLANs Only....................................................................................................342
Dynamic ARP Inspection.........................................................................................................................................342
Conguring Dynamic ARP Inspection................................................................................................................... 343
Source Address Validation............................................................................................................................................ 345
Enabling IP Source Address Validation..................................................................................................................345
DHCP MAC Source Address Validation................................................................................................................ 346
Enabling IP+MAC Source Address Validation.......................................................................................................346
Viewing the Number of SAV Dropped Packets....................................................................................................347
Clearing the Number of SAV Dropped Packets................................................................................................... 347
14 Equal Cost Multi-Path (ECMP)................................................................................................................ 348
ECMP for Flow-Based Anity.....................................................................................................................................348
Conguring the Hash Algorithm............................................................................................................................ 348
Enabling Deterministic ECMP Next Hop.............................................................................................................. 348
Conguring the Hash Algorithm Seed.................................................................................................................. 349
Link Bundle Monitoring................................................................................................................................................. 349
Managing ECMP Group Paths...............................................................................................................................350
Creating an ECMP Group Bundle..........................................................................................................................350
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