Installation guide

Chapter 3. Line Options

707112-001

Subnet Mask

This is the subnet mask that LINCS will use for the IP address entered. If no subnet mask is

entered, but a default router is defined, LINCS will automatically attempt to obtain the subnet

mask from the router. If no subnet mask and no default router are defined, LINCS will assume

the default subnet mask based on the class of the IP address being used.

TN3270 Client Connections

You must indicate the number of concurrent connections that are to be supported through this

interface. Remember that when session sharing is being used, you may have more than one

connection made for each shared session. Each FET card can support up to 1024 connections,

although there is a maximum of 128 sessions per ESX.

BSD 4.2 IP Broadcast

If this option is enabled, LINCS will send two broadcasts. One is 4.2 compatible, and the

other is the standard broadcast address.

Note: BSD 4.2 broadcasts use all 0s as the destination address. Other implementations

as well as BSD 4.3 use all 1s as the destination address. If this option is

disabled, LINCS will send the standard broadcast address only.

Expanded IP Addressing

This is a special customer request feature that allows using IP addresses that are illegal for the

worldwide Internet.

For example, 192.000.000.xxx would normally be reserved, but with this field enabled, an

address of that type can be entered.

TCP Quiet Time

TCP requires 4.5 minutes of recovery time after a device crashes or for a reboot, but LINCS’

IML time varies according to configuration and hardware installed. This field allows you to

define extra time beyond the normal boot time before TCP connections can be attempted.

Default value is 0. (As soon as LINCS has IMLed, TCP can attempt connections.)

Default Router Address

Enter the address of the router on the network, that the SCON-3074 is to direct traffic to that

is not destined for the same subnet. Obtain this value from the system administrator. This

router address must be on the same physical subnet as the IP address assigned to this interface.

DNS Primary Name Server

This option allows you to configure the IP address of a Domain Name Server to forward DNS

requests to. On the SCON-3074, the only time this occurs is when you attempt to PING a

DNS name. The name server resolves the address of the remote machine, by using its domain

name database, and the databases on other name servers. Enter zeros into this field (or leave

it blank) to disable the feature.