Users Guide

Displaying Line-Card Counters...............................................................................................................................342
Accessing Application Core Dumps.............................................................................................................................342
Mini Core Dumps........................................................................................................................................................... 343
Full Kernel Core Dumps.................................................................................................................................................344
Enabling TCP Dumps.....................................................................................................................................................344
Accessing Port Extender Core and Mini Core Dumps.............................................................................................. 345
13 Dynamic Host Conguration Protocol (DHCP).........................................................................................346
DHCP Packet Format and Options............................................................................................................................. 346
Assign an IP Address using DHCP...............................................................................................................................348
Implementation Information..........................................................................................................................................349
Congure the System to be a DHCP Server..............................................................................................................349
Conguring the Server for Automatic Address Allocation..................................................................................350
Specifying a Default Gateway.................................................................................................................................351
Congure a Method of Hostname Resolution...................................................................................................... 351
Using DNS for Address Resolution.........................................................................................................................351
Using NetBIOS WINS for Address Resolution..................................................................................................... 352
Creating Manual Binding Entries............................................................................................................................352
Debugging the DHCP Server.................................................................................................................................352
Using DHCP Clear Commands.............................................................................................................................. 353
Congure the System to be a Relay Agent................................................................................................................ 353
Congure the System to be a DHCP Client...............................................................................................................355
DHCP Client on a Management Interface............................................................................................................355
DHCP Client Operation with Other Features.......................................................................................................355
Congure Secure DHCP...............................................................................................................................................356
Option 82..................................................................................................................................................................356
DHCP Snooping....................................................................................................................................................... 357
Drop DHCP Packets on Snooped VLANs Only....................................................................................................359
Dynamic ARP Inspection........................................................................................................................................ 360
Conguring Dynamic ARP Inspection....................................................................................................................361
Source Address Validation............................................................................................................................................ 362
Enabling IP Source Address Validation..................................................................................................................362
DHCP MAC Source Address Validation................................................................................................................ 363
Enabling IP+MAC Source Address Validation.......................................................................................................363
Viewing the Number of SAV Dropped Packets....................................................................................................364
Clearing the Number of SAV Dropped Packets...................................................................................................364
14 Equal Cost Multi-Path (ECMP)................................................................................................................ 365
ECMP for Flow-Based Anity.....................................................................................................................................365
Enabling Deterministic ECMP Next Hop.............................................................................................................. 365
Conguring the Hash Algorithm Seed.................................................................................................................. 365
Link Bundle Monitoring........................................................................................................................................... 366
Managing ECMP Group Paths.....................................................................................................................................366
Creating an ECMP Group Bundle................................................................................................................................ 367
Modifying the ECMP Group Threshold.......................................................................................................................367
BGP Multipath Operation with Link Bankwidth.........................................................................................................368
Contents
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