Concept Guide

DCB Conguration Exchange................................................................................................................................ 296
Conguration Source Election................................................................................................................................297
Propagation of DCB Information............................................................................................................................297
Auto-Detection and Manual Conguration of the DCBx Version.......................................................................297
DCBx Example......................................................................................................................................................... 298
DCBx Prerequisites and Restrictions.....................................................................................................................298
Conguring DCBx....................................................................................................................................................299
Verifying the DCB Conguration................................................................................................................................. 302
QoS dot1p Trac Classication and Queue Assignment..........................................................................................309
Conguring the Dynamic Buer Method.................................................................................................................... 310
Sample DCB Conguration............................................................................................................................................ 311
PFC and ETS Conguration Command Examples............................................................................................... 313
13 Dynamic Host Conguration Protocol (DHCP)..........................................................................................314
DHCP Packet Format and Options.............................................................................................................................. 314
Assign an IP Address using DHCP................................................................................................................................316
Implementation Information...........................................................................................................................................317
Congure the System to be a DHCP Server...............................................................................................................317
Conguring the Server for Automatic Address Allocation...................................................................................318
Specifying a Default Gateway.................................................................................................................................319
Congure a Method of Hostname Resolution..................................................................................................... 320
Using DNS for Address Resolution........................................................................................................................320
Using NetBIOS WINS for Address Resolution..................................................................................................... 320
Creating Manual Binding Entries............................................................................................................................320
Debugging the DHCP Server..................................................................................................................................321
Using DHCP Clear Commands............................................................................................................................... 321
Congure the System to be a DHCP Client................................................................................................................321
Conguring the DHCP Client System................................................................................................................... 322
DHCP Client on a Management Interface............................................................................................................ 323
DHCP Client Operation with Other Features....................................................................................................... 324
DHCP Relay When DHCP Server and Client are in Dierent VRFs........................................................................ 325
Conguring Route Leaking between VRFs on DHCP Relay Agent................................................................... 325
Non-default VRF conguration for DHCPv6 helper address................................................................................... 326
Conguring DHCP relay source interface...................................................................................................................326
Global DHCP relay source IPv4 or IPv6 conguration ....................................................................................... 326
Interface level DHCP relay source IPv4 or IPv6 conguration ..........................................................................327
Congure the System for User Port Stacking (Option 230)....................................................................................328
Congure Secure DHCP............................................................................................................................................... 328
Option 82..................................................................................................................................................................329
DHCPv6 relay agent options..................................................................................................................................329
DHCP Snooping.......................................................................................................................................................330
Drop DHCP Packets on Snooped VLANs Only....................................................................................................335
Dynamic ARP Inspection........................................................................................................................................ 335
Conguring Dynamic ARP Inspection................................................................................................................... 336
Source Address Validation.............................................................................................................................................337
Enabling IP Source Address Validation.................................................................................................................. 337
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