Copyright (C) 1997, 1998 by International Business Machines Corporation

# TCP/IP Configuration Notebook Online Help

### Configure Advanced Options 2 Page

On this page you can check boxes for additional, IFCONFIG configuration parameters. The default is that none of the additional parameters are checked. The default settings are adequate for most installations. When you exit the TCP/IP Configuration Notebook, any information that you specified on this page will be retained in the SETUP.CMD file.

The selections on this page are:

Disable all routes broadcast (-allrs)

  Check this box to disable all-routes broadcast.

  Uncheck this box to enable all-routes broadcast. This is the default.

Disable address resolution protocol mapping (-arp)

  Check this box to disable Address Resolution Protocol (ARP) mapping between internet addresses and Ethernet addresses or IBM token-ring addresses.

  The default is to enable ARP mapping.

Add routes obtained by ICMP redirects (-icmpred)

  Check this box to enable TCP/IP to add routes obtained by ICMP redirects. Internet Control Message Protocol (ICMP) redirects are messages from a router requesting that a host optimize routing by changing its routes.

Disable sending token-ring headers with extended snap format (-snap)

  Check this box to disable sending of token-ring headers with the extended snap format.

  Extended snap format is an IEEE standard and must be enabled if you want to communicate with computers that use the extended snap format, such as AIX computers.

  The default is to enable sending of token-ring headers with the extended snap format.

Disable routing field support (-bridge)

  Check this box to disable routing field support.

  The default is to enable routing field support.

Enable trailer encapsulation (trailers)

  Check this box to enable trailer encapsulation.

  Trailer encapsulation minimizes the number of memory-to-memory copy operations a receiver must perform.

  On networks that support the Address Resolution Protocol (ARP), selecting -trailers indicates the system should request that other systems use trailer encapsulations when sending to this host.

  Uncheck this box to disable trailer encapsulation. This is the default.

Enable Ethernet IEEE 802.3 protocol (802.3)

  Check this box to enable the Ethernet IEEE 802.3 protocol.

  Uncheck this box to disable the Ethernet IEEE 802.3 protocol and enable the Ethernet DIX 2 protocol. This is the default.

MAC addresses in ARP packets on your token-ring network are in IEEE 802.5 format (canonical)

  Check this box to indicate that the medium access control (MAC) address in Address Resolution Protocol (ARP) packets on this token-ring network are in the canonical IEEE 802.5 format.

  Uncheck this box to indicate that the MAC addresses in ARP packets on this token-ring network are in the non-canonical format. This is the default.

The push buttons on this page are:

Undo
  Remove any changes made since you last accessed this page.

OK
  Close the TCP/IP Configuration Notebook and save all changes made since opening it.

Cancel
  Close the TCP/IP Configuration Notebook and discard any changes made since opening it.

Help
  Get help information for this notebook page.

The subtabs on this page are:

Basic
  Go to the Configure Network Interface Parameters--Basic Options page.

Advanced 1
  Go to the Configure Advanced Options 1 page.

Advanced 2
  Go to the Configure Advanced Options 2 page.

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