Connectivity Guide

Table Of Contents
DCBx Example............................................................................................................................................................264
DCBx Prerequisites and Restrictions................................................................................................................... 265
Configuring DCBx..................................................................................................................................................... 265
Verifying the DCB Configuration.................................................................................................................................268
QoS dot1p Traffic Classification and Queue Assignment...................................................................................... 277
Configuring the Dynamic Buffer Method.................................................................................................................. 277
Sample DCB Configuration........................................................................................................................................... 278
Chapter 13: Dynamic Host Configuration Protocol (DHCP).........................................................281
DHCP Packet Format and Options..............................................................................................................................281
Assign an IP Address using DHCP.............................................................................................................................. 283
Implementation Information..........................................................................................................................................283
Configure the System to be a DHCP Server............................................................................................................284
Configuring the Server for Automatic Address Allocation..............................................................................284
Specifying a Default Gateway................................................................................................................................285
Configure a Method of Hostname Resolution....................................................................................................286
Using DNS for Address Resolution....................................................................................................................... 286
Using NetBIOS WINS for Address Resolution................................................................................................... 286
Creating Manual Binding Entries........................................................................................................................... 286
Debugging the DHCP Server..................................................................................................................................287
Using DHCP Clear Commands............................................................................................................................... 287
Configure the System to be a DHCP Client............................................................................................................. 287
Configuring the DHCP Client System.................................................................................................................. 287
DHCP Client on a Management Interface...........................................................................................................289
DHCP Client Operation with Other Features.....................................................................................................289
DHCP Relay When DHCP Server and Client are in Different VRFs................................................................... 290
Configuring Route Leaking between VRFs on DHCP Relay Agent...............................................................290
Non-default VRF configuration for DHCPv6 helper address................................................................................291
Configuring DHCP relay source interface..................................................................................................................291
Global DHCP relay source IPv4 or IPv6 configuration ....................................................................................292
Interface level DHCP relay source IPv4 or IPv6 configuration .....................................................................292
Configure the System for User Port Stacking (Option 230)............................................................................... 293
Configure Secure DHCP................................................................................................................................................293
Option 82.................................................................................................................................................................... 294
DHCPv6 relay agent options.................................................................................................................................. 294
DHCP Snooping.........................................................................................................................................................295
Configuring the DHCP secondary-subnet.......................................................................................................... 299
Drop DHCP Packets on Snooped VLANs Only.................................................................................................. 299
Dynamic ARP Inspection......................................................................................................................................... 300
Configuring Dynamic ARP Inspection.................................................................................................................. 300
Source Address Validation.............................................................................................................................................301
Enabling IP Source Address Validation................................................................................................................. 301
DHCP MAC Source Address Validation...............................................................................................................302
Enabling IP+MAC Source Address Validation.................................................................................................... 302
Viewing the Number of SAV Dropped Packets................................................................................................. 303
Clearing the Number of SAV Dropped Packets.................................................................................................303
Chapter 14: Equal Cost Multi-Path (ECMP)............................................................................... 304
ECMP for Flow-Based Affinity.................................................................................................................................... 304
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