Concept Guide

Congure Control Plane Policing..................................................................................................................................247
Conguring CoPP for Protocols............................................................................................................................ 248
Conguring CoPP for CPU Queues...................................................................................................................... 250
CoPP for OSPFv3 Packets..................................................................................................................................... 251
Conguring CoPP for OSPFv3.............................................................................................................................. 254
Displaying CoPP Conguration ............................................................................................................................. 254
12 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 257
DHCP Packet Format and Options..............................................................................................................................257
Assign an IP Address using DHCP...............................................................................................................................259
Implementation Information..........................................................................................................................................260
Congure the System to be a DHCP Server............................................................................................................. 260
Conguring the Server for Automatic Address Allocation...................................................................................261
Specifying a Default Gateway................................................................................................................................ 262
Congure a Method of Hostname Resolution..................................................................................................... 263
Using DNS for Address Resolution........................................................................................................................263
Using NetBIOS WINS for Address Resolution..................................................................................................... 263
Creating Manual Binding Entries............................................................................................................................263
Debugging the DHCP Server................................................................................................................................. 264
Using DHCP Clear Commands...............................................................................................................................264
Congure the System to be a Relay Agent................................................................................................................ 264
Congure the System to be a DHCP Client............................................................................................................... 266
Conguring the DHCP Client System...................................................................................................................266
DHCP Client on a Management Interface............................................................................................................ 267
DHCP Client Operation with Other Features.......................................................................................................268
DHCP Relay When DHCP Server and Client are in Dierent VRFs........................................................................ 269
Conguring Route Leaking between VRFs on DHCP Relay Agent................................................................... 269
Non-default VRF conguration for DHCPv6 helper address................................................................................... 270
Conguring DHCP relay source interface....................................................................................................................271
Global DHCP relay source IPv4 or IPv6 conguration ........................................................................................ 271
Interface level DHCP relay source IPv4 or IPv6 conguration ...........................................................................271
Congure the System for User Port Stacking (Option 230)....................................................................................273
Congure Secure DHCP............................................................................................................................................... 273
Option 82.................................................................................................................................................................. 273
DHCP Snooping....................................................................................................................................................... 274
Drop DHCP Packets on Snooped VLANs Only.................................................................................................... 278
Dynamic ARP Inspection.........................................................................................................................................279
Conguring Dynamic ARP Inspection....................................................................................................................279
Source Address Validation............................................................................................................................................. 281
Enabling IP Source Address Validation...................................................................................................................281
DHCP MAC Source Address Validation................................................................................................................ 282
Enabling IP+MAC Source Address Validation.......................................................................................................282
Viewing the Number of SAV Dropped Packets....................................................................................................283
Clearing the Number of SAV Dropped Packets................................................................................................... 283
13 Equal Cost Multi-Path (ECMP)................................................................................................................ 284
Contents
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