Concept Guide

Setting the Speed of Ethernet Interfaces............................................................................................................ 420
Set Auto-Negotiation Options................................................................................................................................ 421
View Advanced Interface Information.........................................................................................................................422
Conguring the Interface Sampling Size...............................................................................................................423
Dynamic Counters......................................................................................................................................................... 424
Clearing Interface Counters....................................................................................................................................424
Compressing Conguration Files................................................................................................................................. 425
20 IPv4 Routing............................................................................................................................................428
IP Addresses...................................................................................................................................................................429
Implementation Information....................................................................................................................................429
Conguration Tasks for IP Addresses..........................................................................................................................429
Assigning IP Addresses to an Interface.......................................................................................................................429
Conguring Static Routes............................................................................................................................................ 430
Congure Static Routes for the Management Interface...........................................................................................431
Using the Congured Source IP Address in ICMP Messages..................................................................................432
Conguring the ICMP Source Interface............................................................................................................... 432
Conguring the Duration to Establish a TCP Connection........................................................................................ 432
Enabling Directed Broadcast........................................................................................................................................ 433
Resolution of Host Names............................................................................................................................................433
Enabling Dynamic Resolution of Host Names............................................................................................................433
Specifying the Local System Domain and a List of Domains................................................................................... 434
Conguring DNS with Traceroute................................................................................................................................434
ARP................................................................................................................................................................................. 435
Conguration Tasks for ARP........................................................................................................................................ 435
Conguring Static ARP Entries....................................................................................................................................435
Enabling Proxy ARP.......................................................................................................................................................436
Clearing ARP Cache......................................................................................................................................................436
ARP Learning via Gratuitous ARP................................................................................................................................436
Enabling ARP Learning via Gratuitous ARP................................................................................................................ 437
ARP Learning via ARP Request....................................................................................................................................437
Conguring ARP Retries...............................................................................................................................................438
ICMP............................................................................................................................................................................... 438
Conguration Tasks for ICMP...................................................................................................................................... 438
Enabling ICMP Unreachable Messages...................................................................................................................... 438
UDP Helper.....................................................................................................................................................................439
Congure UDP Helper.............................................................................................................................................439
Important Points to Remember............................................................................................................................. 439
Enabling UDP Helper.....................................................................................................................................................439
Congurations Using UDP Helper............................................................................................................................... 439
UDP Helper with Broadcast-All Addresses.................................................................................................................440
UDP Helper with Subnet Broadcast Addresses.........................................................................................................440
UDP Helper with Congured Broadcast Addresses...................................................................................................441
UDP Helper with No Congured Broadcast Addresses.............................................................................................441
Troubleshooting UDP Helper........................................................................................................................................ 442
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