Users Guide

Implementation Information.................................................................................................................................... 421
Configuration Tasks for IP Addresses......................................................................................................................... 421
Assigning IP Addresses to an Interface....................................................................................................................... 421
Configuring Static Routes............................................................................................................................................ 422
Configure Static Routes for the Management Interface......................................................................................... 423
IPv4 Path MTU Discovery Overview.......................................................................................................................... 424
Using the Configured Source IP Address in ICMP Messages................................................................................. 424
Configuring the ICMP Source Interface...............................................................................................................424
Configuring the Duration to Establish a TCP Connection........................................................................................425
Enabling Directed Broadcast........................................................................................................................................425
Resolution of Host Names............................................................................................................................................425
Enabling Dynamic Resolution of Host Names............................................................................................................426
Specifying the Local System Domain and a List of Domains...................................................................................426
Configuring DNS with Traceroute...............................................................................................................................427
ARP..................................................................................................................................................................................427
Configuration Tasks for ARP........................................................................................................................................428
Configuring Static ARP Entries....................................................................................................................................428
Enabling Proxy ARP.......................................................................................................................................................428
Clearing ARP Cache......................................................................................................................................................429
ARP Learning via Gratuitous ARP............................................................................................................................... 429
Enabling ARP Learning via Gratuitous ARP............................................................................................................... 429
ARP Learning via ARP Request...................................................................................................................................429
Configuring ARP Retries...............................................................................................................................................430
ICMP................................................................................................................................................................................ 431
Configuration Tasks for ICMP...................................................................................................................................... 431
Enabling ICMP Unreachable Messages.......................................................................................................................431
UDP Helper..................................................................................................................................................................... 431
Configure UDP Helper............................................................................................................................................. 431
Important Points to Remember............................................................................................................................. 432
Enabling UDP Helper.....................................................................................................................................................432
Configuring a Broadcast Address................................................................................................................................432
Configurations Using UDP Helper............................................................................................................................... 433
UDP Helper with Broadcast-All Addresses................................................................................................................ 433
UDP Helper with Subnet Broadcast Addresses........................................................................................................ 434
UDP Helper with Configured Broadcast Addresses..................................................................................................434
UDP Helper with No Configured Broadcast Addresses........................................................................................... 435
Troubleshooting UDP Helper....................................................................................................................................... 435
24 IPv6 Routing............................................................................................................................................436
Protocol Overview.........................................................................................................................................................436
Extended Address Space........................................................................................................................................437
Stateless Autoconfiguration................................................................................................................................... 437
IPv6 Headers............................................................................................................................................................437
IPv6 Header Fields...................................................................................................................................................438
Extension Header Fields......................................................................................................................................... 440
Addressing.................................................................................................................................................................441
Contents
15