Administrator Guide

DCBx Example............................................................................................................................................................. 255
DCBx Prerequisites and Restrictions........................................................................................................................256
Configuring DCBx........................................................................................................................................................256
Verifying the DCB Configuration.....................................................................................................................................259
QoS dot1p Traffic Classification and Queue Assignment.............................................................................................267
Configuring the Dynamic Buffer Method.......................................................................................................................268
Sample DCB Configuration.............................................................................................................................................. 268
13 Dynamic Host Configuration Protocol (DHCP)............................................................................271
DHCP Packet Format and Options..................................................................................................................................271
Assign an IP Address using DHCP...................................................................................................................................272
Implementation Information............................................................................................................................................. 273
Configure the System to be a DHCP Server.................................................................................................................274
Configuring the Server for Automatic Address Allocation..................................................................................... 274
Specifying a Default Gateway....................................................................................................................................275
Configure a Method of Hostname Resolution......................................................................................................... 275
Using DNS for Address Resolution............................................................................................................................275
Using NetBIOS WINS for Address Resolution......................................................................................................... 276
Creating Manual Binding Entries............................................................................................................................... 276
Debugging the DHCP Server.....................................................................................................................................276
Using DHCP Clear Commands.................................................................................................................................. 276
Configure the System to be a DHCP Client...................................................................................................................277
Configuring the DHCP Client System....................................................................................................................... 277
DHCP Client on a Management Interface................................................................................................................278
DHCP Client Operation with Other Features.......................................................................................................... 279
DHCP Relay When DHCP Server and Client are in Different VRFs........................................................................... 279
Configuring Route Leaking between VRFs on DHCP Relay Agent...................................................................... 280
Non-default VRF configuration for DHCPv6 helper address.......................................................................................281
Configuring DHCP relay source interface.......................................................................................................................281
Global DHCP relay source IPv4 or IPv6 configuration ........................................................................................... 281
Interface level DHCP relay source IPv4 or IPv6 configuration .............................................................................282
Configure the System for User Port Stacking (Option 230)...................................................................................... 283
Configure Secure DHCP.................................................................................................................................................. 283
Option 82 (DHCPv4 relay options)...........................................................................................................................283
DHCPv6 relay agent options......................................................................................................................................284
DHCP Snooping...........................................................................................................................................................284
Configuring the DHCP secondary-subnet............................................................................................................... 288
Drop DHCP Packets on Snooped VLANs Only....................................................................................................... 288
Dynamic ARP Inspection............................................................................................................................................ 289
Configuring Dynamic ARP Inspection.......................................................................................................................289
Source Address Validation............................................................................................................................................... 290
Enabling IP Source Address Validation......................................................................................................................291
DHCP MAC Source Address Validation.................................................................................................................... 291
Enabling IP+MAC Source Address Validation...........................................................................................................291
Viewing the Number of SAV Dropped Packets.......................................................................................................292
Clearing the Number of SAV Dropped Packets...................................................................................................... 292
14 Equal Cost Multi-Path (ECMP).................................................................................................293
ECMP for Flow-Based Affinity........................................................................................................................................293
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