Users Guide

24 IPv4 Routing.............................................................................................................................................461
IP Addresses...................................................................................................................................................................462
Implementation Information....................................................................................................................................462
Conguration Tasks for IP Addresses..........................................................................................................................462
Assigning IP Addresses to an Interface.......................................................................................................................462
Conguring Static Routes.............................................................................................................................................463
Congure Static Routes for the Management Interface..........................................................................................464
IPv4 Path MTU Discovery Overview.......................................................................................................................... 465
Packet handling during MTU mismatch................................................................................................................465
Using the Congured Source IP Address in ICMP Messages..................................................................................465
Conguring the ICMP Source Interface............................................................................................................... 465
Conguring the Duration to Establish a TCP Connection........................................................................................ 466
Enabling Directed Broadcast........................................................................................................................................ 466
Resolution of Host Names............................................................................................................................................467
Enabling Dynamic Resolution of Host Names............................................................................................................ 467
Specifying the Local System Domain and a List of Domains....................................................................................467
Conguring DNS with Traceroute................................................................................................................................468
ARP................................................................................................................................................................................. 469
Conguration Tasks for ARP........................................................................................................................................ 469
Conguring Static ARP Entries....................................................................................................................................469
Enabling Proxy ARP.......................................................................................................................................................470
Clearing ARP Cache...................................................................................................................................................... 470
ARP Learning via Gratuitous ARP................................................................................................................................470
Enabling ARP Learning via Gratuitous ARP................................................................................................................470
ARP Learning via ARP Request.................................................................................................................................... 471
Conguring ARP Retries................................................................................................................................................471
ICMP................................................................................................................................................................................472
Conguration Tasks for ICMP...................................................................................................................................... 472
Enabling ICMP Unreachable Messages...................................................................................................................... 472
UDP Helper.....................................................................................................................................................................473
Congure UDP Helper.............................................................................................................................................473
Important Points to Remember..............................................................................................................................473
Enabling UDP Helper..................................................................................................................................................... 473
Congurations Using UDP Helper................................................................................................................................473
UDP Helper with Broadcast-All Addresses................................................................................................................. 474
UDP Helper with Subnet Broadcast Addresses......................................................................................................... 474
UDP Helper with Congured Broadcast Addresses.................................................................................................. 475
UDP Helper with No Congured Broadcast Addresses............................................................................................475
Troubleshooting UDP Helper........................................................................................................................................ 476
25 IPv6 Routing............................................................................................................................................ 477
Protocol Overview......................................................................................................................................................... 477
Extended Address Space........................................................................................................................................478
Stateless Autoconguration....................................................................................................................................478
IPv6 Headers............................................................................................................................................................478
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