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| Configuration |
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| Setting Configuration Values |
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|
Value | Default Value | Description |
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|
LAN Timeout | 0 sec | This value sets the LAN connect timeout in seconds. The |
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| Gateway may use the TCP keepalive timer of the TCP/IP |
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| protocol stack to determine if a client is still reachable. By |
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| specifying this configuration value, the Gateway turns on the |
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| keepalive timer when connecting to the client. |
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| If after the specified amount of time there has been no activity |
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| on the connection, the Gateway will send keepalive probes to |
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| the client to determine if it is still alive. After a system specified |
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| amount of time, the connection will be marked as down |
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| (“dropped”), and the Gateway will release any resources which |
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| were allocated to the associated client. |
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| A value of 0 means no timeout is set. Thus, the Gateway will |
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| wait forever and no keepalive probes are sent. If this value is |
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| set, it is recommended that the largest value be used which still |
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| meets the application’s need for unreachable client detection. |
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| Smaller LAN timeout values will generate keepalive probes |
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| (network traffic) more often than larger values in an otherwise |
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| idle but healthy system, using more of the available network |
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| bandwidth. |
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|
Subnet Mask | 0.0.0.0 | This value is used to enable the LAN/GPIB Gateway to |
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| determine if an IP address is on the same local subnet as |
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| the LAN/GPIB Gateway itself. |
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| When an address is on a different subnet, all packets must be |
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| sent to a subnet gateway. The subnet mask is sometimes not |
|
| needed with subnet gateways, which automatically know when |
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| to forward packets between subnets. A value of 0.0.0.0 or |
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| 255.255.255.255 indicates no subnetting is to be done. |
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Syslog Server | 0.0.0.0 | This value, which is only available on |
Address |
| 95/98/2000/Me/NT), is the IP address of the syslog server to |
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| which you want the LAN/GPIB Gateway to send syslog |
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| messages. |
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| Syslog messages identify changes in the LAN/GPIB Gateway’s |
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| status or error conditions that have occurred. A syslogd |
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| daemon on the syslog server reads and forwards messages |
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| to a log file. |
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Chapter 3 | 39 |
