Deployment Guide

Table Of Contents
DCBx Example............................................................................................................................................................267
DCBx Prerequisites and Restrictions................................................................................................................... 268
Configuring DCBx..................................................................................................................................................... 268
Verifying the DCB Configuration..................................................................................................................................271
QoS dot1p Traffic Classification and Queue Assignment......................................................................................280
Configuring the Dynamic Buffer Method..................................................................................................................280
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 DHCP Client.............................................................................................................290
Configuring the DHCP Client System.................................................................................................................. 290
DHCP Client on a Management Interface...........................................................................................................292
DHCP Client Operation with Other Features.....................................................................................................292
DHCP Relay When DHCP Server and Client are in Different VRFs................................................................... 293
Configuring Route Leaking between VRFs on DHCP Relay Agent...............................................................293
Non-default VRF configuration for DHCPv6 helper address............................................................................... 294
Configuring DHCP relay source interface.................................................................................................................294
Global DHCP relay source IPv4 or IPv6 configuration ....................................................................................295
Interface level DHCP relay source IPv4 or IPv6 configuration .....................................................................295
Configure the System for User Port Stacking (Option 230)............................................................................... 296
Configure Secure DHCP............................................................................................................................................... 296
Option 82 (DHCPv4 relay options).......................................................................................................................297
DHCPv6 relay agent options.................................................................................................................................. 297
DHCP Snooping.........................................................................................................................................................298
Configuring the DHCP secondary-subnet...........................................................................................................302
Drop DHCP Packets on Snooped VLANs Only.................................................................................................. 302
Dynamic ARP Inspection......................................................................................................................................... 303
Configuring Dynamic ARP Inspection.................................................................................................................. 303
Source Address Validation............................................................................................................................................304
Enabling IP Source Address Validation................................................................................................................ 305
DHCP MAC Source Address Validation...............................................................................................................305
Enabling IP+MAC Source Address Validation.................................................................................................... 305
Viewing the Number of SAV Dropped Packets................................................................................................. 306
Clearing the Number of SAV Dropped Packets.................................................................................................306
Chapter 14: Equal Cost Multi-Path (ECMP)............................................................................... 307
ECMP for Flow-Based Affinity.................................................................................................................................... 307
Contents
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