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

# TCP/IP Configuration Notebook Online Help

### Configure Advanced Options 1 Page

For most configurations, the default values for the advanced options (all fields blank) are appropriate. Contact your network administrator or service provider for any special situations.

The fields on this page are:

Broadcast Address

  If you want to send simultaneous transmission of data packets, type the broadcast address in 32-bit dotted-decimal notation.

  Leave this field blank to have TCP/IP automatically calculate the default broadcast address.

  Note: If you have a variably masked subnet you will have to type your broadcast address in manually here.

  The broadcast address is not needed for most configurations.

  Attention: If you use a broadcast address, be sure to have the correct one. An incorrect broadcast address creates extra traffic on the network, causing network performance problems.

Destination Address

  If you want to use a point-to-point link to connect to a TCP/IP network, specify the IP address of the destination host in 32-bit dotted-decimal notation. A point-to-point link is a data link between two locations without the use of any intermediate computer. For example, a SLIP connection by phone line from your home computer to your office computer is a point-to-point link.

  Leave this field blank if the adapter is attached to a network of hosts.

  The destination address is not needed for most configurations, and is not configurable for DHCP.

Metric Count

  Initially this field contains a zero, indicating a direct connection. To define the number of intermediate networks (hops) between you and the destination network or host, set the routing metric count to a number between 0 and 15. The higher the number, the greater number of hops to the destination network or host.

  If a network has more than one routing statement, the TCP/IP protocol stack uses the route with the smaller metric count first. It then tries all routes until it succeeds or until all the routes have been attempted.

Maximum Transmission Unit

  Specify the maximum size of a transmission unit that your communications adapter will transmit. The default value is 1500.

  The following are the maximum transmission unit (MTU) values for common communications adapters.

  MTU
    Adapter

  1462
    PCNet

  1492
    Ethernet on an IEEE 802.3 network

  4400
    Token-Ring 16/4 Adapter/A card on a 16 MB token-ring network

  576
    X.25 coprocessor

  If your communications adapter is not listed in the table, refer to the documentation that came with your adapter for the MTU value.

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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