Users Guide

IP Addresses....................................................................................................................................................................421
Implementation Information.................................................................................................................................... 421
Conguration Tasks for IP Addresses.......................................................................................................................... 421
Assigning IP Addresses to an Interface........................................................................................................................421
Conguring Static Routes.............................................................................................................................................422
Congure Static Routes for the Management Interface.......................................................................................... 423
IPv4 Path MTU Discovery Overview...........................................................................................................................424
Using the Congured Source IP Address in ICMP Messages..................................................................................424
Conguring the ICMP Source Interface................................................................................................................424
Conguring 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
Conguring DNS with Traceroute................................................................................................................................427
ARP..................................................................................................................................................................................427
Conguration Tasks for ARP........................................................................................................................................ 428
Conguring 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
Conguring ARP Retries...............................................................................................................................................430
ICMP................................................................................................................................................................................ 431
Conguration Tasks for ICMP.......................................................................................................................................431
Enabling ICMP Unreachable Messages....................................................................................................................... 431
UDP Helper......................................................................................................................................................................431
Congure UDP Helper............................................................................................................................................. 431
Important Points to Remember..............................................................................................................................432
Enabling UDP Helper.....................................................................................................................................................432
Conguring a Broadcast Address................................................................................................................................ 432
Congurations Using UDP Helper............................................................................................................................... 433
UDP Helper with Broadcast-All Addresses.................................................................................................................433
UDP Helper with Subnet Broadcast Addresses.........................................................................................................434
UDP Helper with Congured Broadcast Addresses.................................................................................................. 434
UDP Helper with No Congured Broadcast Addresses............................................................................................435
Troubleshooting UDP Helper........................................................................................................................................435
24 IPv6 Routing............................................................................................................................................ 436
Protocol Overview.........................................................................................................................................................436
Extended Address Space........................................................................................................................................437
Stateless Autoconguration....................................................................................................................................437
IPv6 Headers............................................................................................................................................................ 437
IPv6 Header Fields...................................................................................................................................................438
Extension Header Fields..........................................................................................................................................440
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