Administrator Guide

13 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 342
DHCP Packet Format and Options............................................................................................................................. 342
Assign an IP Address using DHCP...............................................................................................................................344
Implementation Information..........................................................................................................................................345
Congure the System to be a DHCP Server............................................................................................................. 345
Conguring the Server for Automatic Address Allocation..................................................................................346
Specifying a Default Gateway................................................................................................................................ 347
Congure a Method of Hostname Resolution......................................................................................................347
Using DNS for Address Resolution........................................................................................................................ 347
Using NetBIOS WINS for Address Resolution..................................................................................................... 348
Creating Manual Binding Entries............................................................................................................................348
Debugging the DHCP Server................................................................................................................................. 348
Using DHCP Clear Commands.............................................................................................................................. 349
Congure the System to be a Relay Agent................................................................................................................ 349
Congure the System to be a DHCP Client................................................................................................................351
DHCP Client on a Management Interface.............................................................................................................351
DHCP Client Operation with Other Features........................................................................................................351
Congure Secure DHCP...............................................................................................................................................352
Option 82..................................................................................................................................................................352
DHCP Snooping.......................................................................................................................................................353
Drop DHCP Packets on Snooped VLANs Only....................................................................................................355
Dynamic ARP Inspection........................................................................................................................................ 356
Conguring Dynamic ARP Inspection................................................................................................................... 357
Source Address Validation............................................................................................................................................ 358
Enabling IP Source Address Validation..................................................................................................................358
DHCP MAC Source Address Validation................................................................................................................ 359
Enabling IP+MAC Source Address Validation.......................................................................................................359
Viewing the Number of SAV Dropped Packets................................................................................................... 359
Clearing the Number of SAV Dropped Packets...................................................................................................360
14 Equal Cost Multi-Path (ECMP).................................................................................................................361
ECMP for Flow-Based Anity......................................................................................................................................361
Enabling Deterministic ECMP Next Hop............................................................................................................... 361
Conguring the Hash Algorithm Seed................................................................................................................... 361
Link Bundle Monitoring........................................................................................................................................... 362
Managing ECMP Group Paths.....................................................................................................................................362
Creating an ECMP Group Bundle................................................................................................................................363
Modifying the ECMP Group Threshold.......................................................................................................................363
BGP Multipath Operation with Link Bankwidth.........................................................................................................364
Dynamic Re-calculation of Link Bankwidth................................................................................................................ 365
Weighted ECMP for Static Routes..............................................................................................................................366
ECMP Support in L3 Host and LPM Tables...............................................................................................................366
15 FCoE Transit.............................................................................................................................................367
Fibre Channel over Ethernet........................................................................................................................................ 367
Contents
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