Service Manual

24 IPv4 Routing...................................................................................................................................................... 415
IP Addresses.............................................................................................................................................................416
Implementation Information..........................................................................................................................416
Configuration Tasks for IP Addresses................................................................................................................ 416
Assigning IP Addresses to an Interface..............................................................................................................416
Configuring Static Routes.....................................................................................................................................417
Configure Static Routes for the Management Interface................................................................................418
IPv4 Path MTU Discovery Overview...................................................................................................................419
Using the Configured Source IP Address in ICMP Messages........................................................................419
Configuring the ICMP Source Interface...................................................................................................... 419
Configuring the Duration to Establish a TCP Connection............................................................................420
Enabling Directed Broadcast...............................................................................................................................420
Resolution of Host Names...................................................................................................................................420
Enabling Dynamic Resolution of Host Names................................................................................................. 421
Specifying the Local System Domain and a List of Domains........................................................................421
Configuring DNS with Traceroute......................................................................................................................422
ARP............................................................................................................................................................................ 422
Configuration Tasks for ARP................................................................................................................................423
Configuring Static ARP Entries............................................................................................................................ 423
Enabling Proxy ARP................................................................................................................................................423
Clearing ARP Cache.............................................................................................................................................. 424
ARP Learning via Gratuitous ARP........................................................................................................................424
Enabling ARP Learning via Gratuitous ARP.......................................................................................................424
ARP Learning via ARP Request............................................................................................................................ 425
Configuring ARP Retries....................................................................................................................................... 425
ICMP......................................................................................................................................................................... 426
Configuration Tasks for ICMP............................................................................................................................. 426
Enabling ICMP Unreachable Messages............................................................................................................. 426
UDP Helper..............................................................................................................................................................427
Configure UDP Helper.................................................................................................................................... 427
Important Points to Remember.................................................................................................................... 427
Enabling UDP Helper.............................................................................................................................................427
Configuring a Broadcast Address....................................................................................................................... 427
Configurations Using UDP Helper......................................................................................................................428
UDP Helper with Broadcast-All Addresses.......................................................................................................428
UDP Helper with Subnet Broadcast Addresses............................................................................................... 429
UDP Helper with Configured Broadcast Addresses....................................................................................... 429
UDP Helper with No Configured Broadcast Addresses.................................................................................430
Troubleshooting UDP Helper..............................................................................................................................430
25 IPv6 Routing.......................................................................................................................................................431
Protocol Overview................................................................................................................................................. 431
Extended Address Space.................................................................................................................................432
Stateless Autoconfiguration...........................................................................................................................432
IPv6 Headers..................................................................................................................................................... 432
IPv6 Header Fields............................................................................................................................................433
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