Users Guide

Dynamic Counters.............................................................................................................................................................356
Clearing Interface Counters.......................................................................................................................................356
Chapter 22: Internet Protocol Security (IPSec)............................................................................. 357
Configuring IPSec .............................................................................................................................................................357
Chapter 23: IPv4 Routing.............................................................................................................359
IP Addresses...................................................................................................................................................................... 360
Configuration Tasks for IP Addresses............................................................................................................................ 360
Assigning IP Addresses to an Interface..........................................................................................................................360
Configuring Static Routes.................................................................................................................................................361
Configure Static Routes for the Management Interface.............................................................................................362
IPv4 Path MTU Discovery Overview..............................................................................................................................362
Using the Configured Source IP Address in ICMP Messages.....................................................................................363
Configuring the Duration to Establish a TCP Connection............................................................................................363
Enabling Directed Broadcast........................................................................................................................................... 363
Resolution of Host Names............................................................................................................................................... 364
Enabling Dynamic Resolution of Host Names................................................................................................................364
Specifying the Local System Domain and a List of Domains.......................................................................................364
Configuring DNS with Traceroute.................................................................................................................................. 365
ARP.....................................................................................................................................................................................365
Configuration Tasks for ARP........................................................................................................................................... 366
Configuring Static ARP Entries....................................................................................................................................... 366
Enabling Proxy ARP.......................................................................................................................................................... 366
Clearing ARP Cache..........................................................................................................................................................366
ARP Learning via Gratuitous ARP...................................................................................................................................367
Enabling ARP Learning via Gratuitous ARP................................................................................................................... 367
ARP Learning via ARP Request.......................................................................................................................................367
Configuring ARP Retries.................................................................................................................................................. 368
ICMP...................................................................................................................................................................................368
Configuration Tasks for ICMP.........................................................................................................................................368
Enabling ICMP Unreachable Messages..........................................................................................................................369
UDP Helper........................................................................................................................................................................ 369
Enabling UDP Helper........................................................................................................................................................ 369
Configuring a Broadcast Address....................................................................................................................................370
Configurations Using UDP Helper...................................................................................................................................370
UDP Helper with Broadcast-All Addresses.................................................................................................................... 370
UDP Helper with Subnet Broadcast Addresses.............................................................................................................371
UDP Helper with Configured Broadcast Addresses...................................................................................................... 371
UDP Helper with No Configured Broadcast Addresses............................................................................................... 372
Troubleshooting UDP Helper........................................................................................................................................... 372
Chapter 24: IPv6 Routing.............................................................................................................373
Protocol Overview.............................................................................................................................................................373
Extended Address Space............................................................................................................................................373
Stateless Autoconfiguration.......................................................................................................................................373
IPv6 Headers................................................................................................................................................................374
IPv6 Header Fields.......................................................................................................................................................375
Extension Header Fields............................................................................................................................................. 376
Contents
13