Administrator Guide

Sample DCB Configuration.............................................................................................................................................. 272
13 Dynamic Host Configuration Protocol (DHCP)........................................................................... 275
DHCP Packet Format and Options.................................................................................................................................275
Assign an IP Address using DHCP...................................................................................................................................276
Implementation Information............................................................................................................................................. 277
Configure the System to be a DHCP Server.................................................................................................................278
Configuring the Server for Automatic Address Allocation..................................................................................... 278
Specifying a Default Gateway....................................................................................................................................279
Configure a Method of Hostname Resolution......................................................................................................... 279
Using DNS for Address Resolution............................................................................................................................279
Using NetBIOS WINS for Address Resolution.........................................................................................................280
Creating Manual Binding Entries............................................................................................................................... 280
Debugging the DHCP Server.....................................................................................................................................280
Using DHCP Clear Commands.................................................................................................................................. 280
Configure the System to be a Relay Agent.................................................................................................................... 281
Configure the System to be a DHCP Client.................................................................................................................. 282
Configuring the DHCP Client System.......................................................................................................................282
DHCP Client on a Management Interface................................................................................................................283
DHCP Client Operation with Other Features.......................................................................................................... 284
DHCP Relay When DHCP Server and Client are in Different VRFs...........................................................................285
Configuring Route Leaking between VRFs on DHCP Relay Agent...................................................................... 285
Non-default VRF configuration for DHCPv6 helper address...................................................................................... 286
Configuring DHCP relay source interface......................................................................................................................286
Global DHCP relay source IPv4 or IPv6 configuration .......................................................................................... 286
Interface level DHCP relay source IPv4 or IPv6 configuration .............................................................................287
Configure the System for User Port Stacking (Option 230)...................................................................................... 288
Configure Secure DHCP.................................................................................................................................................. 288
Option 82 (DHCPv4 relay options)...........................................................................................................................288
DHCPv6 relay agent options..................................................................................................................................... 289
DHCP Snooping...........................................................................................................................................................289
Drop DHCP Packets on Snooped VLANs Only....................................................................................................... 293
Dynamic ARP Inspection............................................................................................................................................ 294
Configuring Dynamic ARP Inspection.......................................................................................................................294
Source Address Validation............................................................................................................................................... 295
Enabling IP Source Address Validation..................................................................................................................... 295
DHCP MAC Source Address Validation................................................................................................................... 296
Enabling IP+MAC Source Address Validation..........................................................................................................296
Viewing the Number of SAV Dropped Packets.......................................................................................................297
Clearing the Number of SAV Dropped Packets...................................................................................................... 297
14 Equal Cost Multi-Path (ECMP).................................................................................................298
ECMP for Flow-Based Affinity........................................................................................................................................298
Configuring the Hash Algorithm................................................................................................................................ 298
Enabling Deterministic ECMP Next Hop..................................................................................................................298
Configuring the Hash Algorithm Seed...................................................................................................................... 298
Link Bundle Monitoring.....................................................................................................................................................299
Managing ECMP Group Paths.................................................................................................................................. 299
Creating an ECMP Group Bundle............................................................................................................................. 300
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