Administrator Guide

20 Internet Protocol Security (IPSec)...........................................................................................340
Configuring IPSec ............................................................................................................................................................ 340
21 IPv4 Routing........................................................................................................................... 342
IP Addresses...................................................................................................................................................................... 343
Configuration Tasks for IP Addresses............................................................................................................................ 343
Assigning IP Addresses to an Interface.......................................................................................................................... 343
Configuring Static Routes................................................................................................................................................344
Adding description for IPv4 and IPv6 static routes................................................................................................ 345
Configure Static Routes for the Management Interface.............................................................................................345
IPv4 Path MTU Discovery Overview..............................................................................................................................346
Using the Configured Source IP Address in ICMP Messages.....................................................................................346
Configuring the Duration to Establish a TCP Connection............................................................................................347
Enabling Directed Broadcast............................................................................................................................................347
Resolution of Host Names................................................................................................................................................347
Enabling Dynamic Resolution of Host Names................................................................................................................348
Specifying the Local System Domain and a List of Domains.......................................................................................348
Configuring DNS with Traceroute...................................................................................................................................348
ARP..................................................................................................................................................................................... 349
Configuration Tasks for ARP........................................................................................................................................... 349
Configuring Static ARP Entries....................................................................................................................................... 349
Enabling Proxy ARP.......................................................................................................................................................... 350
Clearing ARP Cache......................................................................................................................................................... 350
ARP Learning via Gratuitous ARP...................................................................................................................................350
Enabling ARP Learning via Gratuitous ARP....................................................................................................................351
ARP Learning via ARP Request....................................................................................................................................... 351
Configuring ARP Retries.................................................................................................................................................. 352
ICMP...................................................................................................................................................................................352
Configuration Tasks for ICMP.........................................................................................................................................352
Enabling ICMP Unreachable Messages..........................................................................................................................352
ICMP Redirects................................................................................................................................................................. 353
UDP Helper........................................................................................................................................................................ 353
Enabling UDP Helper.........................................................................................................................................................354
Configurations Using UDP Helper...................................................................................................................................354
UDP Helper with Broadcast-All Addresses....................................................................................................................354
UDP Helper with Subnet Broadcast Addresses............................................................................................................355
UDP Helper with Configured Broadcast Addresses.....................................................................................................355
UDP Helper with No Configured Broadcast Addresses...............................................................................................356
Troubleshooting UDP Helper...........................................................................................................................................356
22 IPv6 Routing.......................................................................................................................... 357
Protocol Overview............................................................................................................................................................ 357
Extended Address Space........................................................................................................................................... 357
Stateless Autoconfiguration.......................................................................................................................................357
IPv6 Headers................................................................................................................................................................358
IPv6 Header Fields...................................................................................................................................................... 358
Extension Header Fields............................................................................................................................................. 360
Addressing.....................................................................................................................................................................361
12
Contents