Patton electronics IM2RC/I-100B User manual

USER
MANUAL
MODEL IM2RC/I-100B
Ethernet Bridge Module
SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]
Part# 07MIM2RC-I100B-UM
Rev. A
Revised 11/26/10

2
1.0 Warranty Information ................................................................. 3
1.1 Service.......................................................................................... 3
1.2 Safety When Working With Electricity .......................................... 4
2.0 General Information.................................................................... 6
2.1 Features........................................................................................ 6
2.2 Description.................................................................................... 6
2.3 Typical Application........................................................................ 7
3.0 PPP Operational Background.................................................... 8
3.1 Applications .................................................................................. 8
4.0 Configuration ............................................................................ 10
4.1 Connecting the Interface Driver Board ....................................... 11
5.0 Installation................................................................................. 12
5.1 The Model 1001R14 rack chassis .............................................. 12
The Rack Power Supply............................................................. 12
5.2 Installing the Rear IM2RC/I-100B Card and Front Function Card...
13
5.3 Connecting to the 10/100Base-T Ethernet port.......................... 14
5.4 Connecting the Line Interface..................................................... 15
6.0 Operation................................................................................... 16
6.1 Operating Instructions................................................................. 16
6.2 Power-Up.................................................................................... 16
6.3 LED status Monitors ................................................................... 16
A
Specifications ........................................................................... 17
A.1 LAN Connection ......................................................................... 17
A.2 Line Connection .......................................................................... 17
A.3 Protocol ....................................................................................... 17
A.4 MAC Address Aging ................................................................... 17
A.5 On-Board Memory ...................................................................... 17
A.6 Interface ...................................................................................... 17
A.7 LED Indicators ............................................................................ 17
A.8 Power Consumption .................................................................... 17
A.9 Temperature Range .................................................................... 17
A.10 Dimensions ................................................................................. 17

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1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model IM2RC/I-100B components to be
free from defects, and will—at our option—repair or replace the product
should it fail within one year from the first date of the shipment.
This warranty is limited to defects in workmanship or materials, and does
not cover customer damage, abuse or unauthorized modification. If this
product fails or does not performs as warranted, your sole recourse shall
be repair or replacement as described above. Under no condition shall
Patton Electronics be liable for any damages incurred by the use of this
product. These damages include, but are not limited to, the following: lost
profits, lost savings and incidental or consequential damages arising
from the use of or inability to use this product. Patton Electronics spe-
cifically disclaims all other warranties, expressed or implied, and the
installation or use of this product shall be deemed an acceptance of
these terms by the user.
1.1 SERVICE
All warranty and non-warranty repairs must be returned freight prepaid
and insured to Patton Electronics. All returns must have a Return Materi-
als Authorization number on the outside of the shipping container. This
number may be obtained from Patton Electronics Technical Services at:
•Tel:[phone]
•Email:[e-mail]
• URL: http://www.patton.com
Note Packages received without an RMA number will not be
accepted.

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1.2 SAFETY WHEN WORKING WITH ELECTRICITY
• Do not open the device when the power cord is con-
nected. For systems without a power switch and
without an external power adapter, line voltages
are present within the device when the power cord
is connected.
• For devices with an external power adapter, the
power adapter shall be a listed Limited Power
Source The mains outlet that is utilized to power
the device shall be within 10 feet (3 meters) of the
device, shall be easily accessible, and protected
by a circuit breaker in compliance with local regu-
latory requirements.
• For AC powered devices, ensure that the power
cable used meets all applicable standards for the
country in which it is to be installed.
• For AC powered devices which have 3 conductor
power plugs (L1, L2 & GND or Hot, Neutral &
Safety/Protective Ground), the wall outlet (or
socket) must have an earth ground.
• For DC powered devices, ensure that the intercon-
necting cables are rated for proper voltage, cur-
rent, anticipated temperature, flammability, and
mechanical serviceability.
• WAN, LAN & PSTN ports (connections) may have
hazardous voltages present regardless of whether
the device is powered ON or OFF. PSTN relates to
interfaces such as telephone lines, FXS, FXO, DSL,
xDSL, T1, E1, ISDN, Voice, etc. These are known
as “hazardous network voltages” and to avoid
electric shock use caution when working near these
ports. When disconnecting cables for these ports,
detach the far end connection first.
• Do not work on the device or connect or disconnect
cables during periods of lightning activity.
WARNING

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This device contains no user serviceable parts. This device can
only be repaired by qualified service personnel.
This device is NOT intended nor approved for connection to the
PSTN. It is intended only for connection to customer premise
equipment.
Electrostatic Discharge (ESD) can damage equipment and impair
electrical circuitry. It occurs when electronic printed circuit cards
are improperly handled and can result in complete or intermittent
failures. Do the following to prevent ESD:
• Always follow ESD prevention procedures when removing and
replacing cards.
• Wear an ESD-preventive wrist strap, ensuring that it makes
good skin contact. Connect the clip to an unpainted surface of
the chassis frame to safely channel unwanted ESD voltages
to ground.
• To properly guard against ESD damage and shocks, the wrist
strap and cord must operate effectively. If no wrist strap is
available, ground yourself by touching the metal part of the
chassis.
In accordance with the requirements of council direc-
tive 2002/96/EC on Waste of Electrical and Electronic
Equipment (WEEE), ensure that at end-of-life you sepa-
rate this product from other waste and scrap and deliver
to the WEEE collection system in your country for recy-
cling.
WARNING
WARNING
CAUTION

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2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product. This
product has been thoroughly inspected and tested and is warranted for
One Year parts and labor. If any questions arise during installation or use
of this product, please contact Patton Electronics Technical Support at:
[phone].
2.1 FEATURES
• Installs in Patton’s NetLink Rack Systems
• Provides MAC level connection between two peered Ethernet LANs
• RJ-45 line connection
• Operates transparently to higher level protocols such as TCP/IP,
DECnet, NETBIOS and IPX
• PPP (RFC 1661) with Bridging Control Protocol (RFC 1638)
• No configuration necessary
• Automatically discovers, loads and deletes MAC addresses
• Modular 10/100Base-T connection (RJ-45)
• Two LED indicators: status & link integrity
2.2 DESCRIPTION
The Patton IM2RC/I-100B, Ethernet Bridge Module installs in the NetLink
Rack system to provide seamless Ethernet LAN extension. The Patton
IM2RC/I-100B performs the bridging function between two physically
separate Ethernet LANs at the MAC level. Operation of the Patton
IM2RC/I-100B is transparent to higher network level protocols such as
TCP/IP, DECnet, NETBIOS and IPX. The Model IM2RC/I-100B is 802.3
compliant and supports PPP (RFC 1661) with Bridging Control Protocol
(RFC 1638).
Once installed in the local Patton NetLink rack, the Patton IM2RC/I-100B
works in a “plug and play” manner to forward LAN broadcasts, multicasts
and frames destined for the peered Ethernet LAN at the remote end (the
Patton base unit at the remote end must be equipped with an IM1/I mod-
ule). Using the Patton IM2RC/I-100B in conjuction with a G.SHDSL front
card (3088RC) or NTU (2701RC), peered Ethernet LANs can be linked
over leased 2-wire or E1 circuits. The NTU features externally-accessible
DIP switches, loopback diagnostics, SNMP/HTTP remote-management

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capabilities using RocketLink Plug ‘n’ Play, as well as in-band manage-
ment.
2.3 TYPICAL APPLICATION
The Model IM2RC/I-100B is designed to plug directly into the rear of a
Patton Electronics rack card modem (i.e. Model 3088RC or 2701RC).
The Model IM2RC/I-100B is designed to be used as one of a pair of
units. Figure 1 (below) illustrates a typical Model IM2RC/I-100B installa-
tion.
Figure 1. Typical Model IM2RC/I-100B application
4.6 Mbps
Leased Line
(Model 3088RC or 2701RC)
Rack-Mounted Ethernet
WAN Bridge Module
Remote/Satellite
Office
Patton Model 3088
LAN
LAN
Corporate
Headquarters

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3.0 PPP OPERATIONAL BACKGROUND
PPP is a protocol used for multi-plexed transport over a point-to-point
link. PPP operates on all full duplex media, and is a symmetric peer-to-
peer protocol, which can be broken into three main components: 1. A
standard method to encapsulate datagrams over serial links; 2. A Link
Control Protocol (LCP) to establish, configure, and test the data-link con-
nection; 3. A family of Network Control Protocols (NCPs) to establish and
configure different network layer protocols.
In order to establish communications over a point-to-point link, each end
of the PPP link must first announce its capabilities and agree on the
parameters of the link’s operation. This exchange is facilitated through
LCP Configure-Request packets.
Once the link has been established and optional facilities have been
negotiated, PPP will attempt to establish a network protocol. PPP will
use Network Control Protocol (NCP) to choose and configure one or
more network layer protocols. Once each of the network layer protocols
have been configured, datagrams from the established network layer
protocol can be sent over the link. The link will remain configured for
these communications until explicit LCP or NCP packets close the link
down, or until some external event occurs.
The PPP Bridging Control Protocol (BCP), defined in RFC 1638, config-
ures and enables/disables the bridge protocol on both ends of the point-
to-point link. BCP uses the same packet exchange mechanism as the
Link Control Protocol (LCP). BCP is a Network Control Protocol of PPP,
bridge packets may not be exchanged until PPP has reached the net-
work layer protocol phase.
3.1 APPLICATIONS
In situations where a routed network requires connectivity to a remote
Ethernet network, the interface on router can be configured as a PPP IP
Half Bridge. The serial line to the remote bridge functions as Virtual
Ethernet interface, effectively bridge functions as a Virtual Ethernet inter-
face, effectively extending the routers serial port connection to the
remote network. The bridge devicesends bridge packets (BPDU’s) to the
router’s serial interface. The router will receive the layer three address
information and will forward these packets based on its IP address.
Figure 2 on page 9 shows a typical Cisco router with a serial interface
configured as a PPP Half Bridge. The router serial interface uses a
remote device that supports PPP bridging to functions as a node on the
remote Ethernet network. the serial interface on the Cisco will have an IP
address on the same Ethernet subnet as the bridge.

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Figure 2. Cisco router with serial interface, configured as PPP Half Bridge
For example, the customer site is assigned the addresses 192.168.1.1
through 192.168.1.254. The address 192.168.1.1 is also the default
gateway for the remote network. The above settings remove any routing/
forwarding intelligence from the CPE. The associated Cisco configura-
tion will set serial interface (s0) to accommodate half bridging for the
above example.
Authentication is optional under PPP. In a point-to-point leased-line link,
incoming customer facilities are usually fixed in nature, therefore authen-
tication is generally not required. The IM2RC/I-100B does not require
authentication. It also does not respond to authentication requests.
Some networking systems do not define network numbers in packets
sent out over a network. If a packet does not have a specific destination
network number, a router will assume that the packet is set up for the
local segment and will not forward it to any other sub-network. However,
in cases where two devices need to communicate over the wide-area,
bridging can be used to transport non-routable protocols.
Figure 3 illustrates transparent bridging between two routers over a
serial interface (s0). Bridging will occur between the two Ethernet Inter-
faces on Router A (e0 and e1) and the two Ethernet Interfaces on Router
B (e0 and e1).
Figure 3. Transparent bridging between two routers over a serial link.

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4.0 CONFIGURATION
The Model IM2RC/I-100B module plugs into Patton’s 3088RC and
2701RC modems to provide Ethernet LAN extension. The IM2RC/I-
100B has no switches or jumpers and does not need to be configured.
However, factors such as the type of medium, throughput across the link
and clocking mode must be determined by the settings of the baseband
modems. Please refer to your baseband modem (i.e. 3088RC and
2701RC) to make the following settings.
1. Bit Rate: The DTE rate setting of your base unit corresponds to the
throughput of your IM2RC/I-100B bridge module. Use higher speeds
to allow maximum throughput to your extended LAN. Use lower
speeds to limit the access of your extended LAN.
Note The IM2RC/I-100B only supports synchronous speeds.
2. Clocking Mode: Set the clocking modes on the base units so that
one unit is configured for Internal clocking mode and the other unit is
set for Receive Recover clocking mode.
3. When using the IM2RC/I-100B, DISABLE, the “Enable Loop from
DTE” Switch on the front function card (3088RC or 2701RC).
4. All other base unit settings depend upon your application and on the
application medium (twisted pair or coaxial cable).
BASE UNIT CLOCK MODES
Unit “A” Unit “B”
Internal Clock Setting Receive/Recover Clock Setting
Note Unit “A” and Unit “B” are arbitrarily chosen. It does not mat-
ter which unit is “A”, and which is “B”.