Connectivity Guide

Table Of Contents
Configuring DCBx.......................................................................................................................................................271
Verifying the DCB Configuration.................................................................................................................................275
QoS dot1p Traffic Classification and Queue Assignment......................................................................................283
Configuring the Dynamic Buffer Method..................................................................................................................284
Sample DCB Configuration...........................................................................................................................................285
Chapter 13: Dynamic Host Configuration Protocol (DHCP)........................................................ 288
DHCP Packet Format and Options.............................................................................................................................288
Assign an IP Address using DHCP.............................................................................................................................. 290
Implementation Information......................................................................................................................................... 290
Configure the System to be a DHCP Server............................................................................................................ 291
Configuring the Server for Automatic Address Allocation...............................................................................291
Specifying a Default Gateway................................................................................................................................292
Configure a Method of Hostname Resolution....................................................................................................293
Using DNS for Address Resolution....................................................................................................................... 293
Using NetBIOS WINS for Address Resolution....................................................................................................293
Creating Manual Binding Entries........................................................................................................................... 293
Debugging the DHCP Server................................................................................................................................. 294
Using DHCP Clear Commands...............................................................................................................................294
Configure the System to be a Relay Agent.............................................................................................................. 294
Configure the System to be a DHCP Client............................................................................................................. 296
Configuring the DHCP Client System.................................................................................................................. 296
DHCP Client on a Management Interface...........................................................................................................297
DHCP Client Operation with Other Features.....................................................................................................298
DHCP Relay When DHCP Server and Client are in Different VRFs................................................................... 299
Configuring Route Leaking between VRFs on DHCP Relay Agent...............................................................299
Non-default VRF configuration for DHCPv6 helper address...............................................................................300
Configuring DHCP relay source interface.................................................................................................................300
Global DHCP relay source IPv4 or IPv6 configuration ....................................................................................300
Interface level DHCP relay source IPv4 or IPv6 configuration ......................................................................301
Configure the System for User Port Stacking (Option 230)............................................................................... 302
Configure Secure DHCP............................................................................................................................................... 302
Option 82.................................................................................................................................................................... 302
DHCPv6 relay agent options..................................................................................................................................303
DHCP Snooping.........................................................................................................................................................303
Drop DHCP Packets on Snooped VLANs Only.................................................................................................. 307
Dynamic ARP Inspection......................................................................................................................................... 308
Configuring Dynamic ARP Inspection.................................................................................................................. 308
Source Address Validation............................................................................................................................................309
Enabling IP Source Address Validation................................................................................................................. 310
DHCP MAC Source Address Validation................................................................................................................310
Enabling IP+MAC Source Address Validation..................................................................................................... 310
Viewing the Number of SAV Dropped Packets...................................................................................................311
Clearing the Number of SAV Dropped Packets.................................................................................................. 311
Chapter 14: Equal Cost Multi-Path (ECMP)................................................................................312
ECMP for Flow-Based Affinity..................................................................................................................................... 312
Configuring the Hash Algorithm............................................................................................................................. 312
Enabling Deterministic ECMP Next Hop.............................................................................................................. 312
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