Concept Guide

QoS dot1p Trac Classication and Queue Assignment.......................................................................................... 287
Conguring the Dynamic Buer Method................................................................................................................... 288
Sample DCB Conguration...........................................................................................................................................289
PFC and ETS Conguration Command Examples............................................................................................... 291
12 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 292
DHCP Packet Format and Options............................................................................................................................. 292
Assign an IP Address using DHCP...............................................................................................................................294
Implementation Information......................................................................................................................................... 295
Congure the System to be a DHCP Server............................................................................................................. 295
Conguring the Server for Automatic Address Allocation..................................................................................296
Specifying a Default Gateway................................................................................................................................ 297
Congure a Method of Hostname Resolution..................................................................................................... 298
Using DNS for Address Resolution........................................................................................................................298
Using NetBIOS WINS for Address Resolution..................................................................................................... 298
Creating Manual Binding Entries............................................................................................................................298
Debugging the DHCP Server.................................................................................................................................299
Using DHCP Clear Commands.............................................................................................................................. 299
Congure the System to be a DHCP Client...............................................................................................................299
Conguring the DHCP Client System...................................................................................................................300
DHCP Client on a Management Interface.............................................................................................................301
DHCP Client Operation with Other Features.......................................................................................................302
DHCP Relay When DHCP Server and Client are in Dierent VRFs........................................................................ 303
Conguring Route Leaking between VRFs on DHCP Relay Agent................................................................... 303
Non-default VRF conguration for DHCPv6 helper address...................................................................................304
Conguring DHCP relay source interface...................................................................................................................304
Global DHCP relay source IPv4 or IPv6 conguration .......................................................................................304
Interface level DHCP relay source IPv4 or IPv6 conguration ......................................................................... 305
Congure the System for User Port Stacking (Option 230)................................................................................... 306
Congure Secure DHCP...............................................................................................................................................306
Option 82.................................................................................................................................................................. 307
DHCP Snooping....................................................................................................................................................... 307
Drop DHCP Packets on Snooped VLANs Only.....................................................................................................312
Dynamic ARP Inspection......................................................................................................................................... 312
Conguring Dynamic ARP Inspection.................................................................................................................... 313
Source Address Validation............................................................................................................................................. 314
Enabling IP Source Address Validation...................................................................................................................314
DHCP MAC Source Address Validation.................................................................................................................315
Enabling IP+MAC Source Address Validation....................................................................................................... 315
Viewing the Number of SAV Dropped Packets.................................................................................................... 316
Clearing the Number of SAV Dropped Packets....................................................................................................316
13 Equal Cost Multi-Path (ECMP).................................................................................................................317
ECMP for Flow-Based Anity......................................................................................................................................317
Conguring the Hash Algorithm............................................................................................................................. 317
Enabling Deterministic ECMP Next Hop............................................................................................................... 317
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