UNITED STATES MARINE CORPS
MARINE CORPS COMMUNICATION-ELECTRONICS SCHOOL
TRAINING COMMAND
BOX 788251
TWENTYNINE PALMS, CALIFORNIA 92278-8251
STUDENT HANDOUT
ENHANCED POSITION LOCATION REPORTING SYSTEM (EPLRS) RADIO
OPERATOR NETWORKING BASICS
PL.01.02
ENHANCED POSITION LOCATION REPORTING SYSTEM (EPLRS) OPERATOR
COURSE
M09PLSO
03/05/08
APPROVED BY ____________________________
DATE _______________
PL.01.02
LEARNING OBJECTIVES
Enabling Learning Objectives.
a. Without the aid of reference, identify in writing the
definition of an Internet Protocol (IP), per ISBN: 1-58705001 CISCO Internetworking Technologies Handbook. (0621-INST2403ae)
b. Without the aid of reference, identify in writing the
definition of an Internet Protocol (IP) address, per ISBN:
1-58705-001 CISCO Internetworking Technologies Handbook.
(0621-INST-2403af)
c. Without the aid of reference, identify in writing the
definition of a Subnet Mask, per ISBN: 1-58705-001 CISCO
Internetworking Technologies Handbook. (0621-INST-2403ag)
d. Without the aid of reference, identify in writing the
definition of a Default Gateway, per ISBN: 1-58705-001 CISCO
Internetworking Technologies Handbook. (0621-INST-2403ah)
e. Without the aid of reference, identify in writing the
definition of a Transmission Control Protocol (TCP), per
ISBN: 1-58705-001 CISCO Internetworking Technologies
Handbook. (0621-INST-2403ai)
f. Without the aid of reference and provided planning
documents, enter a Transmission Control Protocol Internet
Protocol (TCP/IP) for a Host Platform using My Network
Places, per ISBN: 1-58705-001 CISCO Internetworking
Technologies Handbook and TM 11-5825-299-10 Enhanced Position
Location Reporting System (EPLRS) Operator Manual. (0621INST-2403aj)
g. Without the aid of reference and provided equipment,
connect a Switch to an EPLRS RS, per TM 11-5825-299-10
Enhanced Position Location Reporting System (EPLRS) Operator
Manual and TPN 78-15136-02 Catalyst 3750 Switch Hardware
Installation Guide. (0621-INST-2403ak)
h. Without the aid of reference and provided equipment,
connect a Host Platform to an EPLRS RS, per TM 11-5825-299-10
Enhanced Position Location Reporting System (EPLRS) Operator
Manual (0621-INST-2403al)
REFERENCES
TM 11-5825-299-10, Operator’s Manual for EPLRS Radio Sets
CISCO Internetworking Technologies Handbook ISBN 1-58705-001-3
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1. NETWORKING BASICS.
Internet Protocols IP(s) are the world’s most popular opensystem (nonproprietary) protocol suite because they can be used
to communicate across any set of interconnected networks and are
well suited for Local Area Network (LAN) and Wide Area Network
(WAN) communications. Internet protocols consist of a suite of
communication protocols, of which the two best known are the
Transmission Control Protocol (TCP) and IP.
a. Transmission Control Protocol (TCP).
The TCP provides reliable data transmission in an IP
environment. TCP corresponds to the Transport Layer (Layer 4) of
the Open System Interconnection (OSI) reference model (Figure
1).
Figure 1
OSI Reference Model
TCP has several capabilities which include:
(1) Stream data transfer
(2) Full-duplex operations
(3) Ensures error-free data delivery in proper sequence
(4) Flow control that manages data transmission between
devices so that the transmitting devices do not send more
data then the receiving device can process
b. Internet Protocol (IP).
The Internet Protocol (IP) is a Network-Layer (Layer 3) protocol
(Figure 1) that contains addressing information and some control
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information that enables data packets to be routed. IP(s)
functions include:
(1) Moving data packets from node to node
(2) Control information enabling packet routing based on a
four byte destination address (IP number)
(3) Connectionless, best-effort delivery of datagrams
(4) Fragmentation of datagrams
(5) Reassembly of datagrams
(6) Supports data links with different MaximumTransmission Unit (MTU) sizes
c. IP Addressing.
Each IP address has specific components and follows a basic
format. These IP addresses can be subdivided and used to create
addresses for sub networks. Each host on a TCP/IP network is
assigned a unique 32-bit logical address that is divided into
two main parts: network number and host number (Figure 2).
Figure 2
IP Address Main Parts
Note: Network number identifies the network and host number
identifies a host on the network assigned by a local network
administrator.
Main parts of an IP Address include:
(1) 32-bits IP address separated into four Octets
(2) Each octet is grouped with eight bits
(3) Separated by dots, represented in decimal format
(dotted decimal notation)
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(4) Each bit in the octet has a value, 0 (min) and 255
(max)
d. IP Subnet.
IP networks can be divided into
subnetworks or subnets. Subnets
providing extra flexibility and
addresses and the capability to
smaller networks called
are under local administration
more efficient use of network
contain broadcast traffic.
Note: A given network address can be broken up into many
subnetworks, for example, 10.1.1.4, 10.1.1.8, 10.1.1.12,
10.1.1.16, and 10.1.1.20 are all subnets within network
10.1.0.0. All 0(s) in the host portion of an address specifies
the entire network (Figure 3).
Figure 3
Example EPLRS Network
e. IP Subnet Mask.
Subnet Mask is used to split a complete Internet Protocol (IP)
address into a network and host address.
Subnet masks use the same format and representation technique as
IP addresses (Figure 4).
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Figure 4
IP Subnet Mask Format
Subnet mask determines the number of possible subnets and
numbers of possible hosts that are available for a specific
network address. Examples of this are represented in Figure 5.
Figure 5 IP Subnet Mask
(1) Subnet Mask represented in Dotted Decimal Notation
(2) Subnet Mask represented by slash (/) notation.
(a) /28 = .240 subnet mask (14 hosts)
(b) /29 = .248 subnet mask (6 hosts)
(c) /30 = .252 subnet mask (2 hosts)
A subnet mask determines whether an Internet Protocol (IP)
address is on a local network or on a remote network.
f. Default Gateway.
Default Gateway routes information over whatever networks
necessary to deliver a data packet to the network on which a
destination device resides. Default gateway IP address is
configured using the first usable host IP address on the same
local IP subnet (Figure 6).
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Figure 6
Default Gateway
2. MY NETWORK PLACES/NETWORK CONNECTIONS.
My Network Places application provides the operator with the
ability to view all locations connected to the computer and the
ability to modify those network connections.
a. View Network Connections.
To View Network Connections follow these steps:
(1) Right-click My Network Places icon on EPLRS Network
Manager (ENM)
(2) Select Properties from shortcut menu
(3) Right-click the Local Area Connection icon in the
Network and Dial-up Connections window
(4) Select Properties; Local Area Connection Properties
dialog box opens
(5) Select Internet Protocol (TCP/IP) in the Components
checked are used by this connection: area
(6) Select Properties; Internet Protocol (TCP/IP)
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Properties dialog box opens
b. Modify Network Connections.
To modify network properties of an ENM platform (CF-28
Toughbook) follow these steps:
Note:
This action can cause Host Platform to re-start.
(1) Right-click My Network Places icon on ENM
(2) Select Properties from shortcut menu
(3) Right-click Local Area Connection icon in Network and
Dial-up Connections window
(4) Select Properties; Local Area Connection Properties
dialog box opens
(5) Select Internet Protocol (TCP/IP) in Components
checked are used by this connection: area
(6) Select Properties; Internet Protocol (TCP/IP)
Properties dialog box opens
(7) Select Use the following IP address option on General
page
(8) Enter appropriate Host Platform IP address from
planning documents in IP Address field
(9) Enter appropriate Host Platform Subnet Mask from
planning documents in the Subnet Mask field
(10) Enter appropriate Host Platform Default Gateway from
planning documents in Default gateway field
(11) Left-click Save to save changes
3. EPLRS RADIO SET (RS) HOST CONNECTION.
Connecting a RS to a network switch and host are important
operational networking functions.
a. RS Connection to Network Switch.
To connect the EPLRS RS to a switch using the EPLRS Host
interface cable following these steps:
(1) Ensure EPLRS Host Interface Cable is connected to RS
Host Interface Connector (J4) (Figure 7)
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Figure 7
Host Interface Connector (J2)
(2) Insert EPLRS Host Interface Cable RJ-45 connector into
appropriate port (Figure 8)
Figure 8
Host Interface Cable to Switch Connection
(3) Observe port status Light-Emitting Diode (LED) for
connectivity
Note: The LED turns green when switch and target device have an
established link. LED turns amber while the switch Spanning Tree
Protocol (STP) discovers the topology and searches for loops,
subsequently turning green after about 30 seconds.
b. RS Connection to Host Platform.
To connect an EPLRS RS to a Host Platform, follow these steps:
(1) Ensure the Host Interface Cable is connected to Host
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Interface Connector (J4)
(2) Insert Host Interface Cable RJ-45 connector into
client Network Interface Card (NIC) port (Figure 9)
Figure 9
NIC Port
(3) Observe NIC port status LED for established link
(4) Observe Local Area Connection Icon in the tray for
network connectivity
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