Developers Guide

Table Of Contents
Applying DCB Policies in a Switch Stack.................................................................................................................. 266
Configure a DCBx Operation........................................................................................................................................266
DCBx Operation.........................................................................................................................................................266
DCBx Port Roles........................................................................................................................................................266
DCB Configuration Exchange.................................................................................................................................268
Configuration Source Election............................................................................................................................... 268
Propagation of DCB Information...........................................................................................................................268
Auto-Detection and Manual Configuration of the DCBx Version..................................................................269
DCBx Example........................................................................................................................................................... 269
DCBx Prerequisites and Restrictions................................................................................................................... 269
Configuring DCBx......................................................................................................................................................270
Verifying the DCB Configuration.................................................................................................................................272
QoS dot1p Traffic Classification and Queue Assignment......................................................................................279
Configuring the Dynamic Buffer Method..................................................................................................................280
Sample DCB Configuration............................................................................................................................................281
Chapter 13: Dynamic Host Configuration Protocol (DHCP)........................................................ 283
DHCP Packet Format and Options.............................................................................................................................283
Assign an IP Address using DHCP.............................................................................................................................. 284
Implementation Information......................................................................................................................................... 285
Configure the System to be a DHCP Server........................................................................................................... 286
Configuring the Server for Automatic Address Allocation..............................................................................286
Specifying a Default Gateway................................................................................................................................287
Configure a Method of Hostname Resolution....................................................................................................288
Using DNS for Address Resolution....................................................................................................................... 288
Using NetBIOS WINS for Address Resolution....................................................................................................288
Creating Manual Binding Entries........................................................................................................................... 288
Debugging the DHCP Server................................................................................................................................. 289
Using DHCP Clear Commands...............................................................................................................................289
Configure the System to be a DHCP Client............................................................................................................. 289
Configuring the DHCP Client System.................................................................................................................. 289
DHCP Client on a Management Interface........................................................................................................... 291
DHCP Client Operation with Other Features......................................................................................................291
DHCP Relay When DHCP Server and Client are in Different VRFs................................................................... 292
Configuring Route Leaking between VRFs on DHCP Relay Agent...............................................................292
Non-default VRF configuration for DHCPv6 helper address............................................................................... 293
Configuring DHCP relay source interface.................................................................................................................293
Global DHCP relay source IPv4 or IPv6 configuration ....................................................................................294
Interface level DHCP relay source IPv4 or IPv6 configuration .....................................................................294
Configure Secure DHCP............................................................................................................................................... 295
Option 82 (DHCPv4 relay options).......................................................................................................................295
DHCPv6 relay agent options..................................................................................................................................296
DHCP Snooping.........................................................................................................................................................296
Drop DHCP Packets on Snooped VLANs Only...................................................................................................301
Dynamic ARP Inspection.......................................................................................................................................... 301
Configuring Dynamic ARP Inspection................................................................................................................... 301
Source Address Validation............................................................................................................................................303
Enabling IP Source Address Validation................................................................................................................ 303
DHCP MAC Source Address Validation...............................................................................................................303
Enabling IP+MAC Source Address Validation.................................................................................................... 304
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