Users Guide

Applying DCB Policies in a Switch Stack...................................................................................................................270
Configure a DCBx Operation........................................................................................................................................270
DCBx Operation.........................................................................................................................................................270
DCBx Port Roles........................................................................................................................................................270
DCB Configuration Exchange.................................................................................................................................272
Configuration Source Election............................................................................................................................... 272
Propagation of DCB Information........................................................................................................................... 272
Auto-Detection and Manual Configuration of the DCBx Version..................................................................273
DCBx Example............................................................................................................................................................273
DCBx Prerequisites and Restrictions....................................................................................................................273
Configuring DCBx......................................................................................................................................................274
Verifying the DCB Configuration................................................................................................................................. 277
QoS dot1p Traffic Classification and Queue Assignment......................................................................................284
Configuring the Dynamic Buffer Method..................................................................................................................284
Sample DCB Configuration...........................................................................................................................................285
Chapter 13: Dynamic Host Configuration Protocol (DHCP)........................................................ 287
DHCP Packet Format and Options.............................................................................................................................287
Assign an IP Address using DHCP.............................................................................................................................. 288
Implementation Information......................................................................................................................................... 289
Configure the System to be a DHCP Server........................................................................................................... 290
Configuring the Server for Automatic Address Allocation..............................................................................290
Specifying a Default Gateway.................................................................................................................................291
Configure a Method of Hostname Resolution....................................................................................................292
Using DNS for Address Resolution....................................................................................................................... 292
Using NetBIOS WINS for Address Resolution....................................................................................................292
Creating Manual Binding Entries........................................................................................................................... 292
Debugging the DHCP Server..................................................................................................................................293
Using DHCP Clear Commands...............................................................................................................................293
Configure the System to be a DHCP Client............................................................................................................. 293
Configuring the DHCP Client System.................................................................................................................. 294
DHCP Client on a Management Interface...........................................................................................................295
DHCP Client Operation with Other Features.....................................................................................................295
DHCP Relay When DHCP Server and Client are in Different VRFs................................................................... 296
Configuring Route Leaking between VRFs on DHCP Relay Agent...............................................................296
Non-default VRF configuration for DHCPv6 helper address............................................................................... 297
Configuring DHCP relay source interface.................................................................................................................298
Global DHCP relay source IPv4 or IPv6 configuration ....................................................................................298
Interface level DHCP relay source IPv4 or IPv6 configuration .....................................................................298
Configure Secure DHCP............................................................................................................................................... 299
Option 82 (DHCPv4 relay options).......................................................................................................................300
DHCPv6 relay agent options..................................................................................................................................300
DHCP Snooping..........................................................................................................................................................301
Drop DHCP Packets on Snooped VLANs Only.................................................................................................. 305
Dynamic ARP Inspection......................................................................................................................................... 305
Configuring Dynamic ARP Inspection.................................................................................................................. 306
Source Address Validation............................................................................................................................................ 307
Enabling IP Source Address Validation.................................................................................................................307
DHCP MAC Source Address Validation...............................................................................................................308
Enabling IP+MAC Source Address Validation.................................................................................................... 308
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