Concept Guide

11 Control Plane Policing (CoPP).................................................................................................................. 250
Congure Control Plane Policing.................................................................................................................................. 251
Conguring CoPP for Protocols............................................................................................................................ 252
Conguring CoPP for CPU Queues...................................................................................................................... 254
CoPP for OSPFv3 Packets.................................................................................................................................... 255
Conguring CoPP for OSPFv3.............................................................................................................................. 258
Displaying CoPP Conguration .............................................................................................................................258
12 Dynamic Host Conguration Protocol (DHCP)..........................................................................................261
DHCP Packet Format and Options.............................................................................................................................. 261
Assign an IP Address using DHCP...............................................................................................................................263
Implementation Information..........................................................................................................................................264
Congure the System to be a DHCP Server..............................................................................................................264
Conguring the Server for Automatic Address Allocation..................................................................................265
Specifying a Default Gateway................................................................................................................................ 266
Congure a Method of Hostname Resolution......................................................................................................267
Using DNS for Address Resolution........................................................................................................................ 267
Using NetBIOS WINS for Address Resolution......................................................................................................267
Creating Manual Binding Entries............................................................................................................................267
Debugging the DHCP Server.................................................................................................................................268
Using DHCP Clear Commands.............................................................................................................................. 268
Congure the System to be a Relay Agent................................................................................................................ 268
Congure the System to be a DHCP Client............................................................................................................... 270
Conguring the DHCP Client System................................................................................................................... 270
DHCP Client on a Management Interface.............................................................................................................271
DHCP Client Operation with Other Features....................................................................................................... 272
DHCP Relay When DHCP Server and Client are in Dierent VRFs........................................................................ 273
Conguring Route Leaking between VRFs on DHCP Relay Agent....................................................................273
Non-default VRF conguration for DHCPv6 helper address................................................................................... 274
Conguring DHCP relay source interface................................................................................................................... 275
Global DHCP relay source IPv4 or IPv6 conguration ....................................................................................... 275
Interface level DHCP relay source IPv4 or IPv6 conguration ..........................................................................275
Congure the System for User Port Stacking (Option 230)....................................................................................277
Congure Secure DHCP................................................................................................................................................277
Option 82...................................................................................................................................................................277
DHCP Snooping....................................................................................................................................................... 278
Drop DHCP Packets on Snooped VLANs Only....................................................................................................282
Dynamic ARP Inspection.........................................................................................................................................283
Conguring Dynamic ARP Inspection................................................................................................................... 283
Source Address Validation............................................................................................................................................ 285
Enabling IP Source Address Validation..................................................................................................................285
DHCP MAC Source Address Validation................................................................................................................ 286
Enabling IP+MAC Source Address Validation.......................................................................................................286
Viewing the Number of SAV Dropped Packets....................................................................................................287
Clearing the Number of SAV Dropped Packets................................................................................................... 287
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