Reference Guide

Clearing Interface Counters...........................................................................................................................390
22 Internet Protocol Security (IPSec)..................................................................................... 393
Configuring IPSec ................................................................................................................................................ 393
23 IPv4 Routing........................................................................................................................... 395
IP Addresses.........................................................................................................................................................395
Implementation Information...........................................................................................................................395
Configuration Tasks for IP Addresses.................................................................................................................. 395
Assigning IP Addresses to an Interface...............................................................................................................396
Configuring Static Routes.....................................................................................................................................397
Configure Static Routes for the Management Interface...................................................................................... 398
Enabling Directed Broadcast................................................................................................................................399
Resolution of Host Names.................................................................................................................................... 399
Enabling Dynamic Resolution of Host Names...................................................................................................... 399
Specifying the Local System Domain and a List of Domains................................................................................400
Configuring DNS with Traceroute........................................................................................................................ 400
ARP....................................................................................................................................................................... 401
Configuration Tasks for ARP.................................................................................................................................401
Configuring Static ARP Entries............................................................................................................................. 401
Enabling Proxy ARP.............................................................................................................................................. 402
Clearing ARP Cache..............................................................................................................................................402
ARP Learning via Gratuitous ARP.........................................................................................................................403
Enabling ARP Learning via Gratuitous ARP..........................................................................................................403
ARP Learning via ARP Request............................................................................................................................ 403
Configuring ARP Retries....................................................................................................................................... 404
ICMP..................................................................................................................................................................... 405
Configuration Tasks for ICMP...............................................................................................................................405
Enabling ICMP Unreachable Messages...............................................................................................................405
UDP Helper........................................................................................................................................................... 406
Configure UDP Helper.................................................................................................................................... 406
Important Points to Remember...................................................................................................................... 406
Enabling UDP Helper............................................................................................................................................ 406
Configuring a Broadcast Address........................................................................................................................ 407
Configurations Using UDP Helper.........................................................................................................................407
UDP Helper with Broadcast-All Addresses..........................................................................................................407
UDP Helper with Subnet Broadcast Addresses...................................................................................................408
UDP Helper with Configured Broadcast Addresses.............................................................................................409
UDP Helper with No Configured Broadcast Addresses....................................................................................... 409
Troubleshooting UDP Helper................................................................................................................................ 410
24 IPv6 Routing........................................................................................................................... 411