Connectivity Guide

Table Of Contents
Sample DCB Configuration............................................................................................................................................281
Chapter 13: Dynamic Host Configuration Protocol (DHCP)........................................................ 284
DHCP Packet Format and Options.............................................................................................................................284
Assign an IP Address using DHCP.............................................................................................................................. 286
Implementation Information......................................................................................................................................... 286
Configure the System to be a DHCP Server............................................................................................................287
Configuring the Server for Automatic Address Allocation.............................................................................. 287
Specifying a Default Gateway................................................................................................................................288
Configure a Method of Hostname Resolution....................................................................................................289
Using DNS for Address Resolution....................................................................................................................... 289
Using NetBIOS WINS for Address Resolution................................................................................................... 289
Creating Manual Binding Entries........................................................................................................................... 289
Debugging the DHCP Server................................................................................................................................. 290
Using DHCP Clear Commands...............................................................................................................................290
Configure the System to be a Relay Agent.............................................................................................................. 290
Configure the System to be a DHCP Client............................................................................................................. 292
Configuring the DHCP Client System.................................................................................................................. 292
DHCP Client on a Management Interface...........................................................................................................293
DHCP Client Operation with Other Features.....................................................................................................294
DHCP Relay When DHCP Server and Client are in Different VRFs................................................................... 295
Configuring Route Leaking between VRFs on DHCP Relay Agent...............................................................295
Non-default VRF configuration for DHCPv6 helper address...............................................................................296
Configuring DHCP relay source interface.................................................................................................................296
Global DHCP relay source IPv4 or IPv6 configuration ....................................................................................296
Interface level DHCP relay source IPv4 or IPv6 configuration ..................................................................... 297
Configure the System for User Port Stacking (Option 230)............................................................................... 298
Configure Secure DHCP............................................................................................................................................... 298
Option 82.................................................................................................................................................................... 298
DHCPv6 relay agent options..................................................................................................................................299
DHCP Snooping.........................................................................................................................................................299
Drop DHCP Packets on Snooped VLANs Only.................................................................................................. 303
Dynamic ARP Inspection......................................................................................................................................... 304
Configuring Dynamic ARP Inspection.................................................................................................................. 304
Source Address Validation............................................................................................................................................305
Enabling IP Source Address Validation................................................................................................................ 306
DHCP MAC Source Address Validation...............................................................................................................306
Enabling IP+MAC Source Address Validation.................................................................................................... 306
Viewing the Number of SAV Dropped Packets................................................................................................. 307
Clearing the Number of SAV Dropped Packets.................................................................................................307
Chapter 14: Equal Cost Multi-Path (ECMP)............................................................................... 308
ECMP for Flow-Based Affinity.................................................................................................................................... 308
Configuring the Hash Algorithm............................................................................................................................ 308
Enabling Deterministic ECMP Next Hop............................................................................................................. 308
Configuring the Hash Algorithm Seed................................................................................................................. 309
Link Bundle Monitoring..................................................................................................................................................309
Managing ECMP Group Paths................................................................................................................................310
Creating an ECMP Group Bundle.......................................................................................................................... 310
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