Concept Guide

Assign an IP Address using DHCP................................................................................................................................312
Implementation Information.......................................................................................................................................... 313
Congure the System to be a DHCP Server.............................................................................................................. 313
Conguring the Server for Automatic Address Allocation...................................................................................314
Specifying a Default Gateway.................................................................................................................................315
Congure a Method of Hostname Resolution...................................................................................................... 315
Using DNS for Address Resolution.........................................................................................................................315
Using NetBIOS WINS for Address Resolution...................................................................................................... 316
Creating Manual Binding Entries............................................................................................................................ 316
Debugging the DHCP Server..................................................................................................................................316
Using DHCP Clear Commands................................................................................................................................317
Congure the System to be a Relay Agent................................................................................................................. 317
Congure the System to be a DHCP Client................................................................................................................319
DHCP Client Operation with Other Features........................................................................................................319
DHCP Client on a Management Interface............................................................................................................320
Congure the System for User Port Stacking (Option 230).................................................................................... 321
Conguring DHCP relay source interface....................................................................................................................321
Global DHCP relay source IPv4 or IPv6 conguration ........................................................................................321
Interface level DHCP relay source IPv4 or IPv6 conguration ..........................................................................322
Congure Secure DHCP............................................................................................................................................... 323
Option 82.................................................................................................................................................................. 323
DHCPv6 relay agent options.................................................................................................................................. 324
DHCP Snooping....................................................................................................................................................... 324
Conguring the DHCP secondary-subnet............................................................................................................329
Drop DHCP Packets on Snooped VLANs Only....................................................................................................329
Dynamic ARP Inspection........................................................................................................................................ 330
Conguring Dynamic ARP Inspection................................................................................................................... 330
Source Address Validation............................................................................................................................................ 332
Enabling IP Source Address Validation.................................................................................................................. 332
DHCP MAC Source Address Validation................................................................................................................ 333
Enabling IP+MAC Source Address Validation.......................................................................................................333
Viewing the Number of SAV Dropped Packets....................................................................................................334
Clearing the Number of SAV Dropped Packets................................................................................................... 334
14 Equal Cost Multi-Path (ECMP)................................................................................................................ 335
ECMP for Flow-Based Anity.....................................................................................................................................335
Conguring the Hash Algorithm............................................................................................................................ 335
Enabling Deterministic ECMP Next Hop.............................................................................................................. 335
Conguring the Hash Algorithm Seed.................................................................................................................. 336
Link Bundle Monitoring................................................................................................................................................. 336
Managing ECMP Group Paths...............................................................................................................................337
Creating an ECMP Group Bundle.......................................................................................................................... 337
Modifying the ECMP Group Threshold.................................................................................................................337
RTAG7.............................................................................................................................................................................338
Flow-based Hashing for ECMP................................................................................................................................... 339
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