Users Guide

13 Dynamic Host Conguration Protocol (DHCP)..........................................................................................281
DHCP Packet Format and Options.............................................................................................................................. 281
Assign an IP Address using DHCP...............................................................................................................................283
Implementation Information..........................................................................................................................................284
Congure the System to be a DHCP Server..............................................................................................................284
Conguring the Server for Automatic Address Allocation..................................................................................285
Specifying a Default Gateway................................................................................................................................ 286
Congure a Method of Hostname Resolution..................................................................................................... 286
Using DNS for Address Resolution........................................................................................................................286
Using NetBIOS WINS for Address Resolution......................................................................................................287
Creating Manual Binding Entries............................................................................................................................287
Debugging the DHCP Server................................................................................................................................. 287
Using DHCP Clear Commands...............................................................................................................................288
Congure the System to be a Relay Agent................................................................................................................ 288
Congure the System to be a DHCP Client...............................................................................................................290
DHCP Client Operation with Other Features.......................................................................................................290
DHCP Client on a Management Interface.............................................................................................................291
Congure the System for User Port Stacking (Option 230)....................................................................................292
Congure Secure DHCP............................................................................................................................................... 292
Option 82..................................................................................................................................................................292
DHCP Snooping.......................................................................................................................................................293
Conguring the DHCP secondary-subnet............................................................................................................296
Drop DHCP Packets on Snooped VLANs Only....................................................................................................296
Dynamic ARP Inspection.........................................................................................................................................297
Conguring Dynamic ARP Inspection................................................................................................................... 298
Source Address Validation............................................................................................................................................ 299
Enabling IP Source Address Validation..................................................................................................................299
DHCP MAC Source Address Validation................................................................................................................ 300
Enabling IP+MAC Source Address Validation.......................................................................................................300
Viewing the Number of SAV Dropped Packets.................................................................................................... 301
Clearing the Number of SAV Dropped Packets....................................................................................................301
14 Equal Cost Multi-Path (ECMP)................................................................................................................ 302
ECMP for Flow-Based Anity.....................................................................................................................................302
Conguring the Hash Algorithm............................................................................................................................ 302
Enabling Deterministic ECMP Next Hop.............................................................................................................. 302
Conguring the Hash Algorithm Seed.................................................................................................................. 303
Link Bundle Monitoring................................................................................................................................................. 303
Managing ECMP Group Paths...............................................................................................................................304
Creating an ECMP Group Bundle..........................................................................................................................304
Modifying the ECMP Group Threshold................................................................................................................ 304
RTAG7.............................................................................................................................................................................305
Flow-based Hashing for ECMP................................................................................................................................... 306
15 FIP Snooping............................................................................................................................................309
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