Administrator Guide

DCBx Prerequisites and Restrictions.....................................................................................................................272
Conguring DCBx.................................................................................................................................................... 272
Verifying the DCB Conguration..................................................................................................................................276
QoS dot1p Trac Classication and Queue Assignment..........................................................................................283
Conguring the Dynamic Buer Method....................................................................................................................283
Sample DCB Conguration...........................................................................................................................................284
PFC and ETS Conguration Command Examples...............................................................................................286
12 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 287
DHCP Packet Format and Options..............................................................................................................................287
Assign an IP Address using DHCP...............................................................................................................................289
Implementation Information......................................................................................................................................... 290
Congure the System to be a DHCP Server............................................................................................................. 290
Conguring the Server for Automatic Address Allocation.................................................................................. 291
Specifying a Default Gateway................................................................................................................................ 292
Congure a Method of Hostname Resolution..................................................................................................... 292
Using DNS for Address Resolution........................................................................................................................292
Using NetBIOS WINS for Address Resolution..................................................................................................... 293
Creating Manual Binding Entries............................................................................................................................293
Debugging the DHCP Server................................................................................................................................. 293
Using DHCP Clear Commands.............................................................................................................................. 294
Congure the System to be a DHCP Client............................................................................................................... 294
Conguring the DHCP Client System...................................................................................................................294
DHCP Client on a Management Interface............................................................................................................296
DHCP Client Operation with Other Features.......................................................................................................296
Congure the System for User Port Stacking (Option 230)....................................................................................297
Congure Secure DHCP............................................................................................................................................... 297
Option 82..................................................................................................................................................................298
DHCP Snooping.......................................................................................................................................................298
Drop DHCP Packets on Snooped VLANs Only.................................................................................................... 301
Dynamic ARP Inspection.........................................................................................................................................302
Conguring Dynamic ARP Inspection................................................................................................................... 303
Source Address Validation............................................................................................................................................ 304
Enabling IP Source Address Validation..................................................................................................................304
DHCP MAC Source Address Validation................................................................................................................ 305
Enabling IP+MAC Source Address Validation.......................................................................................................305
Viewing the Number of SAV Dropped Packets................................................................................................... 306
Clearing the Number of SAV Dropped Packets...................................................................................................306
13 Equal Cost Multi-Path (ECMP)................................................................................................................ 307
ECMP for Flow-Based Anity..................................................................................................................................... 307
Conguring the Hash Algorithm Seed...................................................................................................................307
Link Bundle Monitoring..................................................................................................................................................307
Managing ECMP Group Paths...............................................................................................................................308
Creating an ECMP Group Bundle..........................................................................................................................308
Modifying the ECMP Group Threshold................................................................................................................ 309
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