Users Guide

13 Dynamic Host Conguration Protocol (DHCP).........................................................................................338
DHCP Packet Format and Options............................................................................................................................. 338
Assign an IP Address using DHCP...............................................................................................................................340
Implementation Information.......................................................................................................................................... 341
Congure the System to be a DHCP Server.............................................................................................................. 341
Conguring the Server for Automatic Address Allocation..................................................................................342
Specifying a Default Gateway................................................................................................................................ 343
Congure a Method of Hostname Resolution......................................................................................................343
Using DNS for Address Resolution........................................................................................................................343
Using NetBIOS WINS for Address Resolution..................................................................................................... 344
Creating Manual Binding Entries............................................................................................................................344
Debugging the DHCP Server................................................................................................................................. 344
Using DHCP Clear Commands.............................................................................................................................. 345
Congure the System to be a Relay Agent................................................................................................................ 345
Congure the System to be a DHCP Client............................................................................................................... 347
DHCP Client on a Management Interface............................................................................................................ 347
DHCP Client Operation with Other Features....................................................................................................... 347
Congure Secure DHCP...............................................................................................................................................348
Option 82..................................................................................................................................................................348
DHCP Snooping.......................................................................................................................................................349
Drop DHCP Packets on Snooped VLANs Only.....................................................................................................351
Dynamic ARP Inspection.........................................................................................................................................352
Conguring Dynamic ARP Inspection................................................................................................................... 353
Source Address Validation............................................................................................................................................ 354
Enabling IP Source Address Validation..................................................................................................................354
DHCP MAC Source Address Validation................................................................................................................ 355
Enabling IP+MAC Source Address Validation.......................................................................................................355
Viewing the Number of SAV Dropped Packets................................................................................................... 355
Clearing the Number of SAV Dropped Packets...................................................................................................356
14 Equal Cost Multi-Path (ECMP)................................................................................................................ 357
ECMP for Flow-Based Anity..................................................................................................................................... 357
Enabling Deterministic ECMP Next Hop...............................................................................................................357
Conguring the Hash Algorithm Seed...................................................................................................................357
Link Bundle Monitoring........................................................................................................................................... 358
Managing ECMP Group Paths.....................................................................................................................................358
Creating an ECMP Group Bundle................................................................................................................................359
Modifying the ECMP Group Threshold...................................................................................................................... 359
BGP Multipath Operation with Link Bankwidth.........................................................................................................360
Dynamic Re-calculation of Link Bankwidth.................................................................................................................361
Weighted ECMP for Static Routes..............................................................................................................................362
ECMP Support in L3 Host and LPM Tables............................................................................................................... 362
15 FCoE Transit.............................................................................................................................................363
Fibre Channel over Ethernet........................................................................................................................................ 363
Contents
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