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QoS dot1p Trac Classication and Queue Assignment...........................................................................................281
Conguring the Dynamic Buer Method....................................................................................................................282
Sample DCB Conguration...........................................................................................................................................283
PFC and ETS Conguration Command Examples...............................................................................................285
13 Dynamic Host Conguration Protocol (DHCP).........................................................................................286
DHCP Packet Format and Options............................................................................................................................. 286
Assign an IP Address using DHCP...............................................................................................................................288
Implementation Information..........................................................................................................................................289
Congure the System to be a DHCP Server..............................................................................................................289
Conguring the Server for Automatic Address Allocation..................................................................................290
Specifying a Default Gateway.................................................................................................................................291
Congure a Method of Hostname Resolution...................................................................................................... 291
Using DNS for Address Resolution.........................................................................................................................291
Using NetBIOS WINS for Address Resolution..................................................................................................... 292
Creating Manual Binding Entries............................................................................................................................292
Debugging the DHCP Server................................................................................................................................. 292
Using DHCP Clear Commands...............................................................................................................................293
Congure the System to be a DHCP Client............................................................................................................... 293
Conguring the DHCP Client System...................................................................................................................293
DHCP Client on a Management Interface............................................................................................................295
DHCP Client Operation with Other Features.......................................................................................................295
Congure the System for User Port Stacking (Option 230)................................................................................... 296
Congure Secure DHCP...............................................................................................................................................296
Option 82.................................................................................................................................................................. 297
DHCP Snooping....................................................................................................................................................... 297
Conguring the DHCP secondary-subnet............................................................................................................302
Drop DHCP Packets on Snooped VLANs Only....................................................................................................302
Dynamic ARP Inspection.........................................................................................................................................303
Conguring Dynamic ARP Inspection................................................................................................................... 304
Source Address Validation............................................................................................................................................ 305
Enabling IP Source Address Validation..................................................................................................................305
DHCP MAC Source Address Validation................................................................................................................ 306
Enabling IP+MAC Source Address Validation.......................................................................................................306
Viewing the Number of SAV Dropped Packets....................................................................................................307
Clearing the Number of SAV Dropped Packets................................................................................................... 307
14 Equal Cost Multi-Path (ECMP)................................................................................................................ 308
ECMP for Flow-Based Anity.....................................................................................................................................308
Conguring the Hash Algorithm............................................................................................................................ 308
Enabling Deterministic ECMP Next Hop.............................................................................................................. 308
Conguring the Hash Algorithm Seed.................................................................................................................. 309
Link Bundle Monitoring................................................................................................................................................. 309
Managing ECMP Group Paths................................................................................................................................310
Creating an ECMP Group Bundle...........................................................................................................................310
Modifying the ECMP Group Threshold................................................................................................................. 310
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