Users Guide

DCBx Operation.......................................................................................................................................................280
DCBx Port Roles.......................................................................................................................................................281
DCB Conguration Exchange.................................................................................................................................282
Conguration Source Election................................................................................................................................282
Propagation of DCB Information............................................................................................................................283
Auto-Detection and Manual Conguration of the DCBx Version...................................................................... 283
DCBx Example..........................................................................................................................................................284
DCBx Prerequisites and Restrictions.....................................................................................................................284
Conguring DCBx....................................................................................................................................................284
Verifying the DCB Conguration................................................................................................................................. 288
QoS dot1p Trac Classication and Queue Assignment..........................................................................................296
Conguring the Dynamic Buer Method....................................................................................................................297
Sample DCB Conguration...........................................................................................................................................298
PFC and ETS Conguration Command Examples.............................................................................................. 300
13 Dynamic Host Conguration Protocol (DHCP)..........................................................................................301
DHCP Packet Format and Options.............................................................................................................................. 301
Assign an IP Address using DHCP...............................................................................................................................303
Implementation Information..........................................................................................................................................304
Congure the System to be a DHCP Server............................................................................................................. 304
Conguring the Server for Automatic Address Allocation..................................................................................305
Specifying a Default Gateway................................................................................................................................306
Congure a Method of Hostname Resolution..................................................................................................... 306
Using DNS for Address Resolution........................................................................................................................306
Using NetBIOS WINS for Address Resolution......................................................................................................307
Creating Manual Binding Entries............................................................................................................................307
Debugging the DHCP Server................................................................................................................................. 307
Using DHCP Clear Commands.............................................................................................................................. 308
Congure the System to be a DHCP Client...............................................................................................................308
Conguring the DHCP Client System...................................................................................................................308
DHCP Client on a Management Interface.............................................................................................................310
DHCP Client Operation with Other Features........................................................................................................310
DHCP Relay When DHCP Server and Client are in Dierent VRFs..........................................................................311
Conguring Route Leaking between VRFs on DHCP Relay Agent.....................................................................311
Congure the System for User Port Stacking (Option 230).................................................................................... 313
Congure Secure DHCP................................................................................................................................................313
Option 82...................................................................................................................................................................313
DHCP Snooping........................................................................................................................................................314
Conguring the DHCP secondary-subnet.............................................................................................................318
Drop DHCP Packets on Snooped VLANs Only.....................................................................................................319
Dynamic ARP Inspection......................................................................................................................................... 319
Conguring Dynamic ARP Inspection................................................................................................................... 320
Source Address Validation............................................................................................................................................. 321
Enabling IP Source Address Validation...................................................................................................................321
DHCP MAC Source Address Validation................................................................................................................ 322
Enabling IP+MAC Source Address Validation.......................................................................................................322
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