Users Guide

IP Addresses...................................................................................................................................................................420
Implementation Information....................................................................................................................................420
Conguration Tasks for IP Addresses..........................................................................................................................420
Assigning IP Addresses to an Interface.......................................................................................................................420
Conguring Static Routes............................................................................................................................................. 421
Congure Static Routes for the Management Interface.......................................................................................... 422
IPv4 Path MTU Discovery Overview...........................................................................................................................423
Using the Congured Source IP Address in ICMP Messages..................................................................................423
Conguring the ICMP Source Interface............................................................................................................... 423
Conguring the Duration to Establish a TCP Connection........................................................................................ 424
Enabling Directed Broadcast........................................................................................................................................ 424
Resolution of Host Names............................................................................................................................................424
Enabling Dynamic Resolution of Host Names............................................................................................................425
Specifying the Local System Domain and a List of Domains................................................................................... 425
Conguring DNS with Traceroute................................................................................................................................426
ARP..................................................................................................................................................................................426
Conguration Tasks for ARP.........................................................................................................................................427
Conguring Static ARP Entries.................................................................................................................................... 427
Enabling Proxy ARP....................................................................................................................................................... 427
Clearing ARP Cache...................................................................................................................................................... 428
ARP Learning via Gratuitous ARP................................................................................................................................428
Enabling ARP Learning via Gratuitous ARP................................................................................................................428
ARP Learning via ARP Request................................................................................................................................... 428
Conguring ARP Retries...............................................................................................................................................429
ICMP............................................................................................................................................................................... 430
Conguration Tasks for ICMP...................................................................................................................................... 430
Enabling ICMP Unreachable Messages...................................................................................................................... 430
UDP Helper.....................................................................................................................................................................430
Congure UDP Helper.............................................................................................................................................430
Important Points to Remember.............................................................................................................................. 431
Enabling UDP Helper......................................................................................................................................................431
Conguring a Broadcast Address................................................................................................................................. 431
Congurations Using UDP Helper............................................................................................................................... 432
UDP Helper with Broadcast-All Addresses.................................................................................................................432
UDP Helper with Subnet Broadcast Addresses.........................................................................................................433
UDP Helper with Congured Broadcast Addresses.................................................................................................. 433
UDP Helper with No Congured Broadcast Addresses............................................................................................434
Troubleshooting UDP Helper........................................................................................................................................ 434
24 IPv6 Routing............................................................................................................................................435
Protocol Overview.........................................................................................................................................................435
Extended Address Space........................................................................................................................................436
Stateless Autoconguration................................................................................................................................... 436
IPv6 Headers............................................................................................................................................................436
IPv6 Header Fields...................................................................................................................................................437
Extension Header Fields..........................................................................................................................................439
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