Administrator Guide

IP Addresses...................................................................................................................................................................424
Implementation Information....................................................................................................................................424
Conguration Tasks for IP Addresses..........................................................................................................................424
Assigning IP Addresses to an Interface.......................................................................................................................424
Conguring Static Routes.............................................................................................................................................425
Congure Static Routes for the Management Interface.......................................................................................... 426
IPv4 Path MTU Discovery Overview...........................................................................................................................427
Using the Congured Source IP Address in ICMP Messages.................................................................................. 427
Conguring the ICMP Source Interface................................................................................................................427
Conguring the Duration to Establish a TCP Connection........................................................................................ 428
Enabling Directed Broadcast........................................................................................................................................ 428
Resolution of Host Names............................................................................................................................................428
Enabling Dynamic Resolution of Host Names............................................................................................................429
Specifying the Local System Domain and a List of Domains................................................................................... 429
Conguring DNS with Traceroute................................................................................................................................430
ARP................................................................................................................................................................................. 430
Conguration Tasks for ARP......................................................................................................................................... 431
Conguring Static ARP Entries.....................................................................................................................................431
Enabling Proxy ARP........................................................................................................................................................431
Clearing ARP Cache...................................................................................................................................................... 432
ARP Learning via Gratuitous ARP................................................................................................................................432
Enabling ARP Learning via Gratuitous ARP................................................................................................................432
ARP Learning via ARP Request................................................................................................................................... 432
Conguring ARP Retries...............................................................................................................................................433
ICMP............................................................................................................................................................................... 434
Conguration Tasks for ICMP...................................................................................................................................... 434
Enabling ICMP Unreachable Messages...................................................................................................................... 434
UDP Helper.....................................................................................................................................................................434
Congure UDP Helper.............................................................................................................................................434
Important Points to Remember............................................................................................................................. 435
Enabling UDP Helper.....................................................................................................................................................435
Conguring a Broadcast Address................................................................................................................................ 435
Congurations Using UDP Helper............................................................................................................................... 436
UDP Helper with Broadcast-All Addresses.................................................................................................................436
UDP Helper with Subnet Broadcast Addresses.........................................................................................................437
UDP Helper with Congured Broadcast Addresses.................................................................................................. 437
UDP Helper with No Congured Broadcast Addresses............................................................................................438
Troubleshooting UDP Helper........................................................................................................................................ 438
24 IPv6 Routing............................................................................................................................................ 439
Protocol Overview.........................................................................................................................................................439
Extended Address Space........................................................................................................................................440
Stateless Autoconguration................................................................................................................................... 440
IPv6 Headers............................................................................................................................................................440
IPv6 Header Fields................................................................................................................................................... 441
Extension Header Fields..........................................................................................................................................443
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