Concept Guide

21 IPv4 Routing.............................................................................................................................................448
IP Addresses...................................................................................................................................................................449
Implementation Information....................................................................................................................................449
Conguration Tasks for IP Addresses..........................................................................................................................449
Assigning IP Addresses to an Interface.......................................................................................................................449
Conguring Static Routes............................................................................................................................................ 450
Congure Static Routes for the Management Interface...........................................................................................451
Using the Congured Source IP Address in ICMP Messages..................................................................................452
Conguring the ICMP Source Interface............................................................................................................... 452
Conguring the Duration to Establish a TCP Connection........................................................................................ 452
Enabling Directed Broadcast........................................................................................................................................ 453
Resolution of Host Names............................................................................................................................................453
Enabling Dynamic Resolution of Host Names............................................................................................................453
Specifying the Local System Domain and a List of Domains................................................................................... 454
Conguring DNS with Traceroute................................................................................................................................454
ARP................................................................................................................................................................................. 455
Conguration Tasks for ARP........................................................................................................................................ 455
Conguring Static ARP Entries....................................................................................................................................455
Enabling Proxy ARP.......................................................................................................................................................456
Clearing ARP Cache......................................................................................................................................................456
ARP Learning via Gratuitous ARP............................................................................................................................... 456
Enabling ARP Learning via Gratuitous ARP................................................................................................................457
ARP Learning via ARP Request................................................................................................................................... 457
Conguring ARP Retries...............................................................................................................................................458
ICMP............................................................................................................................................................................... 458
Conguration Tasks for ICMP......................................................................................................................................458
Enabling ICMP Unreachable Messages...................................................................................................................... 458
ICMP Redirects..............................................................................................................................................................459
UDP Helper.....................................................................................................................................................................460
Congure UDP Helper............................................................................................................................................ 460
Important Points to Remember............................................................................................................................. 460
Enabling UDP Helper.....................................................................................................................................................460
Conguring a Broadcast Address................................................................................................................................ 460
Congurations Using UDP Helper................................................................................................................................ 461
UDP Helper with Broadcast-All Addresses................................................................................................................. 461
UDP Helper with Subnet Broadcast Addresses.........................................................................................................462
UDP Helper with Congured Broadcast Addresses..................................................................................................462
UDP Helper with No Congured Broadcast Addresses............................................................................................463
Troubleshooting UDP Helper........................................................................................................................................463
22 IPv6 Routing............................................................................................................................................464
Protocol Overview.........................................................................................................................................................464
Extended Address Space........................................................................................................................................465
Stateless Autoconguration................................................................................................................................... 465
IPv6 Headers............................................................................................................................................................465
Contents
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