Setup Guide

Congure the System to be a DHCP Server.............................................................................................................. 316
Conguring the Server for Automatic Address Allocation...................................................................................317
Specifying a Default Gateway.................................................................................................................................318
Congure a Method of Hostname Resolution...................................................................................................... 319
Using DNS for Address Resolution.........................................................................................................................319
Using NetBIOS WINS for Address Resolution...................................................................................................... 319
Creating Manual Binding Entries............................................................................................................................ 319
Debugging the DHCP Server.................................................................................................................................320
Using DHCP Clear Commands.............................................................................................................................. 320
Congure the System to be a DHCP Client............................................................................................................... 320
Conguring the DHCP Client System....................................................................................................................321
DHCP Client on a Management Interface............................................................................................................ 322
DHCP Client Operation with Other Features.......................................................................................................323
DHCP Relay When DHCP Server and Client are in Dierent VRFs........................................................................ 324
Conguring Route Leaking between VRFs on DHCP Relay Agent................................................................... 324
Non-default VRF conguration for DHCPv6 helper address................................................................................... 325
Conguring DHCP relay source interface...................................................................................................................325
Global DHCP relay source IPv4 or IPv6 conguration ....................................................................................... 325
Interface level DHCP relay source IPv4 or IPv6 conguration ..........................................................................326
Congure the System for User Port Stacking (Option 230)....................................................................................327
Congure Secure DHCP............................................................................................................................................... 327
Option 82 (DHCPv4 relay options)........................................................................................................................328
DHCPv6 relay agent options..................................................................................................................................329
DHCP Snooping.......................................................................................................................................................329
Conguring the DHCP secondary-subnet............................................................................................................334
Drop DHCP Packets on Snooped VLANs Only....................................................................................................334
Dynamic ARP Inspection........................................................................................................................................ 335
Conguring Dynamic ARP Inspection................................................................................................................... 335
Source Address Validation.............................................................................................................................................337
Enabling IP Source Address Validation.................................................................................................................. 337
DHCP MAC Source Address Validation................................................................................................................ 338
Enabling IP+MAC Source Address Validation.......................................................................................................338
Viewing the Number of SAV Dropped Packets....................................................................................................339
Clearing the Number of SAV Dropped Packets................................................................................................... 339
14 Equal Cost Multi-Path (ECMP)................................................................................................................ 340
ECMP for Flow-Based Anity.....................................................................................................................................340
Conguring the Hash Algorithm............................................................................................................................ 340
Enabling Deterministic ECMP Next Hop.............................................................................................................. 340
Conguring the Hash Algorithm Seed................................................................................................................... 341
Link Bundle Monitoring.................................................................................................................................................. 341
Managing ECMP Group Paths...............................................................................................................................342
Creating an ECMP Group Bundle.......................................................................................................................... 342
Modifying the ECMP Group Threshold.................................................................................................................342
Support for /128 IPv6 and /32 IPv4 Prexes in Layer 3 Host Table and LPM Table......................................343
Support for ECMP in host table............................................................................................................................ 344
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