White Papers

21 IPv4 Routing.............................................................................................................................................423
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
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.........................................................................................427
Enabling Directed Broadcast........................................................................................................................................ 428
Resolution of Host Names............................................................................................................................................428
Enabling Dynamic Resolution of Host Names............................................................................................................428
Specifying the Local System Domain and a List of Domains................................................................................... 429
Conguring DNS with Traceroute................................................................................................................................429
ARP................................................................................................................................................................................. 430
Conguration Tasks for ARP........................................................................................................................................ 430
Conguring Static ARP Entries....................................................................................................................................430
Enabling Proxy ARP........................................................................................................................................................431
Clearing ARP Cache.......................................................................................................................................................431
ARP Learning via Gratuitous ARP................................................................................................................................ 431
Enabling ARP Learning via Gratuitous ARP................................................................................................................432
ARP Learning via ARP Request................................................................................................................................... 432
Conguring ARP Retries...............................................................................................................................................433
ICMP............................................................................................................................................................................... 433
Conguration Tasks for ICMP...................................................................................................................................... 433
Enabling ICMP Unreachable Messages...................................................................................................................... 433
UDP Helper.....................................................................................................................................................................434
Congure UDP Helper.............................................................................................................................................434
Important Points to Remember..............................................................................................................................434
Enabling UDP Helper.....................................................................................................................................................434
Conguring a Broadcast Address................................................................................................................................ 435
Congurations Using UDP Helper............................................................................................................................... 435
UDP Helper with Broadcast-All Addresses.................................................................................................................435
UDP Helper with Subnet Broadcast Addresses.........................................................................................................436
UDP Helper with Congured Broadcast Addresses..................................................................................................436
UDP Helper with No Congured Broadcast Addresses............................................................................................ 437
Troubleshooting UDP Helper........................................................................................................................................ 437
22 IPv6 Routing............................................................................................................................................438
Protocol Overview.........................................................................................................................................................438
Extended Address Space........................................................................................................................................439
Stateless Autoconguration................................................................................................................................... 439
IPv6 Headers............................................................................................................................................................439
Longest Prex Match (LPM) Table and IPv6 /65 – /128 support................................................................... 440
Contents
15