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LAN Protocols
TCP/IP
IP traffic is commonly associated with the Department of Defense (DOD) TCP/IP
suite and is often run over Ethernet LANs. The LCS60 allows asynchronous end-
points, such as a terminal or host connected to a data switch, to log onto any Eth-
ernet TCP/IP LAN host by using the LCS60’s async-to-TCP gateway service. The
LCS60 provides the terminal user with an interface to the TCP/IP telnet com-
mand, which allows the network user to remotely log onto LAN hosts via a vir-
tual terminal.
Conversely, an Ethernet TCP/IP LAN host can use the LCS60’s TCP-to-async
gateway service to access any asynchronous device (host, modem pool, etc.) con-
nected to the data switch network. The LCS60 terminates the TCP/IP telnet
command initiated by the LAN host and provides the LAN user with asynchro-
nous connectivity to the data switch network.
Domain Name Server (DNS) Resolver
The LCS60 can be configured as a Resolver in the DNS; this allows the LCS60 to
access a DNS Server for the translation of symbolic names into IP addresses.
This reduces the administration required for the LCS60. This feature provides a
less cumbersome and more efficient mechanism for performing translations
between symbolic host names and Internet addresses than checking the LCS60
database files.
The DNS function is a more manageable translation mechanism for large and
interconnected networks. It can connect to a name server (which maintains the
information database) on another host on the local or remote network.
The LCS60 default operating environment is still the use of the local host file. If
dns service is selected, the system will act as a resolver only.
Simple Network Management Protocol (SNMP)
SNMP software allows the LCS60 to report its TCP/IP status to an SNMP
Manager. SNMP service can be started and stopped using the lcsadm interface
of the LCS60. Implicit in the SNMP architectural model is a collection of network
management stations and network elements. Network management stations exe-
cute management applications which monitor and control network elements.
Network elements are devices such as hosts, gateways, terminal servers, and the
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