Concept Guide

DCB Conguration Exchange................................................................................................................................ 288
Conguration Source Election................................................................................................................................288
Propagation of DCB Information............................................................................................................................289
Auto-Detection and Manual Conguration of the DCBx Version...................................................................... 289
DCBx Example......................................................................................................................................................... 290
DCBx Prerequisites and Restrictions.....................................................................................................................290
Conguring DCBx.....................................................................................................................................................291
Verifying the DCB Conguration................................................................................................................................. 294
QoS dot1p Trac Classication and Queue Assignment..........................................................................................304
Conguring the Dynamic Buer Method................................................................................................................... 305
Sample DCB Conguration...........................................................................................................................................306
PFC and ETS Conguration Command Examples...............................................................................................307
13 Dynamic Host Conguration Protocol (DHCP).........................................................................................308
DHCP Packet Format and Options............................................................................................................................. 308
Assign an IP Address using DHCP................................................................................................................................310
Implementation Information........................................................................................................................................... 311
Congure the System to be a DHCP Server............................................................................................................... 311
Conguring the Server for Automatic Address Allocation...................................................................................312
Specifying a Default Gateway.................................................................................................................................313
Congure a Method of Hostname Resolution...................................................................................................... 314
Using DNS for Address Resolution.........................................................................................................................314
Using NetBIOS WINS for Address Resolution...................................................................................................... 314
Creating Manual Binding Entries.............................................................................................................................314
Debugging the DHCP Server..................................................................................................................................315
Using DHCP Clear Commands............................................................................................................................... 315
Congure the System to be a Relay Agent................................................................................................................. 315
Congure the System to be a DHCP Client................................................................................................................ 317
Conguring the DHCP Client System....................................................................................................................317
DHCP Client on a Management Interface.............................................................................................................319
DHCP Client Operation with Other Features........................................................................................................319
DHCP Relay When DHCP Server and Client are in Dierent VRFs........................................................................ 320
Conguring Route Leaking between VRFs on DHCP Relay Agent................................................................... 320
Non-default VRF conguration for DHCPv6 helper address....................................................................................321
Conguring DHCP relay source interface...................................................................................................................322
Global DHCP relay source IPv4 or IPv6 conguration ....................................................................................... 322
Interface level DHCP relay source IPv4 or IPv6 conguration ..........................................................................322
Congure the System for User Port Stacking (Option 230)....................................................................................324
Congure Secure DHCP............................................................................................................................................... 324
Option 82.................................................................................................................................................................. 324
DHCP Snooping.......................................................................................................................................................325
Drop DHCP Packets on Snooped VLANs Only....................................................................................................329
Dynamic ARP Inspection........................................................................................................................................ 330
Conguring Dynamic ARP Inspection................................................................................................................... 330
Source Address Validation............................................................................................................................................ 332
Enabling IP Source Address Validation.................................................................................................................. 332
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