Install Guide

Table Of Contents
DCBx Example........................................................................................................................................................... 268
DCBx Prerequisites and Restrictions................................................................................................................... 269
Configuring DCBx..................................................................................................................................................... 269
Verifying the DCB Configuration.................................................................................................................................272
QoS dot1p Traffic Classification and Queue Assignment.......................................................................................281
Configuring the Dynamic Buffer Method...................................................................................................................281
Sample DCB Configuration...........................................................................................................................................282
Chapter 13: Dynamic Host Configuration Protocol (DHCP)........................................................ 285
DHCP Packet Format and Options.............................................................................................................................285
Assign an IP Address using DHCP.............................................................................................................................. 287
Implementation Information..........................................................................................................................................287
Configure the System to be a DHCP Server............................................................................................................288
Configuring the Server for Automatic Address Allocation..............................................................................288
Specifying a Default Gateway................................................................................................................................289
Configure a Method of Hostname Resolution................................................................................................... 290
Using DNS for Address Resolution....................................................................................................................... 290
Using NetBIOS WINS for Address Resolution................................................................................................... 290
Creating Manual Binding Entries........................................................................................................................... 290
Debugging the DHCP Server.................................................................................................................................. 291
Using DHCP Clear Commands................................................................................................................................291
Configure the System to be a DHCP Client..............................................................................................................291
Configuring the DHCP Client System...................................................................................................................291
DHCP Client on a Management Interface...........................................................................................................293
DHCP Client Operation with Other Features.....................................................................................................293
DHCP Relay When DHCP Server and Client are in Different VRFs................................................................... 294
Configuring Route Leaking between VRFs on DHCP Relay Agent...............................................................294
Non-default VRF configuration for DHCPv6 helper address...............................................................................295
Configuring DHCP relay source interface.................................................................................................................295
Global DHCP relay source IPv4 or IPv6 configuration ....................................................................................296
Interface level DHCP relay source IPv4 or IPv6 configuration .....................................................................296
Configure the System for User Port Stacking (Option 230)............................................................................... 297
Configure Secure DHCP................................................................................................................................................297
Option 82 (DHCPv4 relay options).......................................................................................................................298
DHCPv6 relay agent options..................................................................................................................................298
DHCP Snooping.........................................................................................................................................................299
Configuring the DHCP secondary-subnet...........................................................................................................303
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
Contents
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