Concept Guide

Congure the System to be a DHCP Server...............................................................................................................317
Conguring the Server for Automatic Address Allocation...................................................................................318
Specifying a Default Gateway.................................................................................................................................319
Congure a Method of Hostname Resolution..................................................................................................... 320
Using DNS for Address Resolution........................................................................................................................320
Using NetBIOS WINS for Address Resolution..................................................................................................... 320
Creating Manual Binding Entries............................................................................................................................320
Debugging the DHCP Server..................................................................................................................................321
Using DHCP Clear Commands............................................................................................................................... 321
Congure the System to be a Relay Agent................................................................................................................. 321
Congure the System to be a DHCP Client............................................................................................................... 323
Conguring the DHCP Client System................................................................................................................... 323
DHCP Client on a Management Interface............................................................................................................325
DHCP Client Operation with Other Features.......................................................................................................325
DHCP Relay When DHCP Server and Client are in Dierent VRFs........................................................................ 326
Conguring Route Leaking between VRFs on DHCP Relay Agent................................................................... 326
Non-default VRF conguration for DHCPv6 helper address................................................................................... 327
Conguring DHCP relay source interface...................................................................................................................328
Global DHCP relay source IPv4 or IPv6 conguration ....................................................................................... 328
Interface level DHCP relay source IPv4 or IPv6 conguration ..........................................................................328
Congure the System for User Port Stacking (Option 230)....................................................................................330
Congure Secure DHCP...............................................................................................................................................330
Option 82..................................................................................................................................................................330
DHCPv6 relay agent options...................................................................................................................................331
DHCP Snooping........................................................................................................................................................331
Drop DHCP Packets on Snooped VLANs Only....................................................................................................336
Dynamic ARP Inspection.........................................................................................................................................336
Conguring Dynamic ARP Inspection....................................................................................................................337
Source Address Validation............................................................................................................................................ 338
Enabling IP Source Address Validation.................................................................................................................. 338
DHCP MAC Source Address Validation................................................................................................................ 339
Enabling IP+MAC Source Address Validation.......................................................................................................339
Viewing the Number of SAV Dropped Packets................................................................................................... 340
Clearing the Number of SAV Dropped Packets...................................................................................................340
14 Equal Cost Multi-Path (ECMP).................................................................................................................341
ECMP for Flow-Based Anity......................................................................................................................................341
Conguring the Hash Algorithm............................................................................................................................. 341
Enabling Deterministic ECMP Next Hop............................................................................................................... 341
Conguring the Hash Algorithm Seed.................................................................................................................. 342
Link Bundle Monitoring................................................................................................................................................. 342
Managing ECMP Group Paths...............................................................................................................................343
Creating an ECMP Group Bundle.......................................................................................................................... 343
Modifying the ECMP Group Threshold.................................................................................................................343
RTAG7............................................................................................................................................................................. 344
Flow-based Hashing for ECMP................................................................................................................................... 345
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