White Papers

Conguring IPSec .........................................................................................................................................................428
23 IPv4 Routing............................................................................................................................................430
IP Addresses....................................................................................................................................................................431
Implementation Information.................................................................................................................................... 431
Conguration Tasks for IP Addresses.......................................................................................................................... 431
Assigning IP Addresses to an Interface........................................................................................................................431
Conguring Static Routes.............................................................................................................................................432
Congure Static Routes for the Management Interface.......................................................................................... 433
IPv4 Path MTU Discovery Overview.......................................................................................................................... 434
Using the Congured Source IP Address in ICMP Messages..................................................................................434
Conguring the ICMP Source Interface............................................................................................................... 434
Conguring the Duration to Establish a TCP Connection........................................................................................ 435
Enabling Directed Broadcast........................................................................................................................................ 435
Resolution of Host Names............................................................................................................................................435
Enabling Dynamic Resolution of Host Names............................................................................................................436
Specifying the Local System Domain and a List of Domains................................................................................... 436
Conguring DNS with Traceroute................................................................................................................................437
ARP..................................................................................................................................................................................437
Conguration Tasks for ARP........................................................................................................................................ 438
Conguring Static ARP Entries....................................................................................................................................438
Enabling Proxy ARP.......................................................................................................................................................438
Clearing ARP Cache......................................................................................................................................................439
ARP Learning via Gratuitous ARP................................................................................................................................439
Enabling ARP Learning via Gratuitous ARP................................................................................................................439
ARP Learning via ARP Request................................................................................................................................... 439
Conguring ARP Retries...............................................................................................................................................440
ICMP................................................................................................................................................................................ 441
Conguration Tasks for ICMP.......................................................................................................................................441
Enabling ICMP Unreachable Messages....................................................................................................................... 441
UDP Helper..................................................................................................................................................................... 441
Congure UDP Helper............................................................................................................................................. 441
Important Points to Remember..............................................................................................................................442
Enabling UDP Helper.....................................................................................................................................................442
Conguring a Broadcast Address................................................................................................................................ 442
Congurations Using UDP Helper............................................................................................................................... 443
UDP Helper with Broadcast-All Addresses.................................................................................................................443
UDP Helper with Subnet Broadcast Addresses.........................................................................................................444
UDP Helper with Congured Broadcast Addresses..................................................................................................444
UDP Helper with No Congured Broadcast Addresses............................................................................................445
Troubleshooting UDP Helper........................................................................................................................................445
24 IPv6 Routing............................................................................................................................................ 446
Protocol Overview......................................................................................................................................................... 446
Extended Address Space........................................................................................................................................447
Stateless Autoconguration....................................................................................................................................447
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