Reference Guide

24 IPv4 Routing........................................................................................................463
IP Addresses......................................................................................................................................463
Implementation Information......................................................................................................463
Configuration Tasks for IP Addresses.............................................................................................. 463
Assigning IP Addresses to an Interface............................................................................................464
Configuring Static Routes................................................................................................................ 465
Configure Static Routes for the Management Interface.................................................................466
IPv4 Path MTU Discovery Overview.................................................................................................467
Using the Configured Source IP Address in ICMP Messages......................................................... 468
Configuring the ICMP Source Interface.................................................................................... 468
Configuring the Duration to Establish a TCP Connection..............................................................468
Enabling Directed Broadcast............................................................................................................469
Resolution of Host Names............................................................................................................... 469
Enabling Dynamic Resolution of Host Names................................................................................ 469
Specifying the Local System Domain and a List of Domains..........................................................470
Configuring DNS with Traceroute....................................................................................................471
ARP.....................................................................................................................................................471
Configuration Tasks for ARP.............................................................................................................472
Configuring Static ARP Entries......................................................................................................... 472
Enabling Proxy ARP...........................................................................................................................473
Clearing ARP Cache..........................................................................................................................473
ARP Learning via Gratuitous ARP......................................................................................................473
Enabling ARP Learning via Gratuitous ARP...................................................................................... 474
ARP Learning via ARP Request......................................................................................................... 474
Configuring ARP Retries................................................................................................................... 475
ICMP.................................................................................................................................................. 476
Configuration Tasks for ICMP.......................................................................................................... 476
Enabling ICMP Unreachable Messages............................................................................................476
UDP Helper....................................................................................................................................... 476
Configure UDP Helper................................................................................................................476
Important Points to Remember..................................................................................................477
Enabling UDP Helper........................................................................................................................ 477
Configuring a Broadcast Address.....................................................................................................477
Configurations Using UDP Helper................................................................................................... 478
UDP Helper with Broadcast-All Addresses...................................................................................... 478
UDP Helper with Subnet Broadcast Addresses............................................................................... 479
UDP Helper with Configured Broadcast Addresses........................................................................480
UDP Helper with No Configured Broadcast Addresses..................................................................480
Troubleshooting UDP Helper.......................................................................................................... 480
25 IPv6 Routing........................................................................................................483