Setup Guide

Table Of Contents
Applying DCB Policies in a Switch Stack....................................................................................................................... 254
Configure a DCBx Operation........................................................................................................................................... 254
DCBx Operation...........................................................................................................................................................254
DCBx Port Roles..........................................................................................................................................................254
DCB Configuration Exchange....................................................................................................................................256
Configuration Source Election...................................................................................................................................256
Propagation of DCB Information...............................................................................................................................256
Auto-Detection and Manual Configuration of the DCBx Version......................................................................... 257
DCBx Example............................................................................................................................................................. 257
DCBx Prerequisites and Restrictions........................................................................................................................258
Configuring DCBx........................................................................................................................................................258
Verifying the DCB Configuration.....................................................................................................................................260
QoS dot1p Traffic Classification and Queue Assignment.............................................................................................267
Configuring the Dynamic Buffer Method.......................................................................................................................267
Sample DCB Configuration.............................................................................................................................................. 268
13 Dynamic Host Configuration Protocol (DHCP)............................................................................271
DHCP Packet Format and Options..................................................................................................................................271
Assign an IP Address using DHCP...................................................................................................................................272
Implementation Information............................................................................................................................................. 273
Configure the System to be a DHCP Server.................................................................................................................274
Configuring the Server for Automatic Address Allocation..................................................................................... 274
Specifying a Default Gateway....................................................................................................................................275
Configure a Method of Hostname Resolution......................................................................................................... 275
Using DNS for Address Resolution............................................................................................................................275
Using NetBIOS WINS for Address Resolution......................................................................................................... 276
Creating Manual Binding Entries............................................................................................................................... 276
Debugging the DHCP Server.....................................................................................................................................276
Using DHCP Clear Commands.................................................................................................................................. 276
Configure the System to be a DHCP Client...................................................................................................................277
Configuring the DHCP Client System....................................................................................................................... 277
DHCP Client on a Management Interface................................................................................................................278
DHCP Client Operation with Other Features.......................................................................................................... 279
DHCP Relay When DHCP Server and Client are in Different VRFs........................................................................... 279
Configuring Route Leaking between VRFs on DHCP Relay Agent...................................................................... 280
Non-default VRF configuration for DHCPv6 helper address.......................................................................................281
Configuring DHCP relay source interface.......................................................................................................................281
Global DHCP relay source IPv4 or IPv6 configuration ........................................................................................... 281
Interface level DHCP relay source IPv4 or IPv6 configuration .............................................................................282
Configure Secure DHCP.................................................................................................................................................. 283
Option 82......................................................................................................................................................................283
DHCPv6 relay agent options......................................................................................................................................283
DHCP Snooping...........................................................................................................................................................284
Drop DHCP Packets on Snooped VLANs Only....................................................................................................... 288
Dynamic ARP Inspection............................................................................................................................................ 288
Configuring Dynamic ARP Inspection.......................................................................................................................288
Source Address Validation............................................................................................................................................... 290
Enabling IP Source Address Validation..................................................................................................................... 290
DHCP MAC Source Address Validation................................................................................................................... 290
Enabling IP+MAC Source Address Validation...........................................................................................................291
Contents
9