Patton electronic Network Router IM1 I4 User Manual

USER  
MANUAL  
MODEL IM1/I4  
Ethernet Bridge with  
Integral 4-Port Hub  
QuikConnect™ Module  
Part# 07MIM1/I4-C  
Doc# 090141UC  
Revised 07/19/00  
SALES OFFICE  
(301) 975-1000  
TECHNICAL SUPPORT  
(301) 975-1007  
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An ISO-9001  
Certified Company  
 
2.0 GENERAL INFORMATION  
2.3 TYPICAL APPLICATION  
Thank you for your purchase of this Patton Electronics product.  
This product has been thoroughly inspected and tested and is warrant-  
ed for One Year parts and labor. If any questions or problems arise  
during installation or use of this product, please do not hesitate to con-  
tact us at: (301) 975-1007, http://www.patton.com; support@pat-  
ton.com.  
The Model IM1/I4 QuickConnect™ is designed to plug directly  
into the rear of a Patton Electronics baseband modem (e.g. Model  
1092A or 1095). The Model IM1/I4 is designed to be used as one of a  
pair of units. Figure 1 (below) illustrates a typical Model IM1/I4 instal-  
lation.  
Rack Mounted  
1095RC with  
IM2RC Bridge Module  
2.1 FEATURES  
1095 with  
IM1/I4 Hub  
Module  
• Standard interface module for use in QuikConnect platform  
• Integral 4-Port HUB  
• Industry standard RJ-45 10Base-T connections (four)  
• Transparent LAN bridging  
10Base-T  
Workstations  
• PPP (Point to Point Protocol RFC 1661) with Bridging Control  
Protocol (RFC 1638)  
10Base-T  
Ethernet  
• 4096 MAC address table  
LAN  
• 1 MB RAM; 128 KB FLASH  
• Throughput latency of 1 frame  
Figure 1. Typical Model IM1/I4 application  
• Automatic LAN MAC address aging  
2.2 DESCRIPTION  
The Patton Model IM1/I4 QuikConnect™ is an Ethernet Bridge  
with built-in four (4) port hub. The IM1/I4 interface module provides  
LAN extension when used in conjunction with either the IM1/I,  
IM2RC/IA, or IM1/I4 modules. The module performs transparent  
Ethernet bridging and functions at the MAC level. As such, the mod-  
ule, and its communications infrastructure, is transparent to higher  
level protocols such as TCP/IP, DECnet, NETBIOS and IPX network  
protocols. Only broadcasts, multicasts, or frames destined for peered  
LAN are forwarded. The Model IM1/I4 is 802.3 compliant and supports  
PPP (RFC 1661) with Bridging Control Protocol (RFC 1638).  
Once installed in the local Patton base unit, the Patton IM1/I4  
works in a “plug and play” manner to forward LAN broadcasts, multi-  
casts 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  
IM/I, IM1/I4 or IM2RC/I module). Using the Patton IM1/I4, Ethernet  
LANs can be linked over leased 2-wire/4-wire, DDS, PCM and campus  
fiber circuits.  
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Patton  
IM1/I4  
Bridge  
Router  
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 sym-  
metric 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 connection; 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.  
Ethernet LAN  
PEC Device w/ Serial I/F  
Figure 2. Cisco router with serial interface, configured as PPP Half Bridge.  
For example, the customer site is assigned the addresses  
192.168.1.0/24 through 192.168.1.1/24. The address  
192.168.1.1/24 is also the default gateway for the remote net-  
work. The above settings remove any routing/forwarding intel-  
ligence from the CPE. The associated Cisco configuration 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 authentication is generally not required. If  
the foreign device requires authentication via PAP or CHAP,  
the PPP software will respond with default Peer-ID consisting  
of the units Ethernet MAC address and a password which  
consists of the unit’s Ethernet MAC address.  
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 for-  
ward it to any other sub-network. However, in cases where  
two devices need to communicate over the wide-area, bridg-  
ing 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 Interfaces on Router A (e0 and e1)  
and the two Ethernet Interfaces on Router B (e0 and e1).  
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 con-  
figure one or more network layer protocols. Once each of the net-  
work 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, configures 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  
network layer protocol phase.  
3.1 Applications  
In situations where a routed network requires connectivity  
to a remote Ethernet network, the interface on a router can  
be configured as a PPP IP Half Bridge. The serial line to the  
remote bridge functions as a Virtual Ethernet interface, effec-  
tively extending the routers serial port connection to the  
remote network. The bridge device sends 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.  
!
Serial Interface  
no ip routing  
!
interface Ethernet0  
ip address 1.1.1.1 255.255.255.0  
bridge-group 1  
!
interface Serial0  
ip address 1.1.1.1 255.255.255.0  
Patton DSL Modem  
with Ethernet Interface  
Router A  
S0  
e0  
LAN  
S1  
LAN  
Using Bridge-Groups, multi-  
ple remote LANs can be  
bridged over the wide-area.  
Router B  
encapsulation PPP  
bridge-group 1  
!
S1  
S0  
Figure 2 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 function 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.  
interface Serial1  
ip address 2.2.2.2 255.255.255.0  
bridge-group 1  
!
bridge 1 protocol ieee  
!
e0  
e1  
LAN  
LAN  
LAN  
Serial Interface  
Figure 3. Transparent bridging between two routers over a serial link.  
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3.0 CONFIGURATION  
4.0 INSTALLATION  
The Model IM1/14 module plugs into Patton’s fiber and copper  
baseband modems to provide Ethernet LAN extension. The IM1/14  
has no switches or jumpers and does not need to be configured.  
However, factors such as type of medium, throughput across the link  
and clocking mode must be determined by the settings of the base-  
band modems. Please refer to your baseband modem (i.e. 1092A,  
1095, etc) to make the following settings.  
The Model IM1/I4 is completely plug and play. This section tells  
you how to make the connections.  
4.1 INSTALLING THE QUICKCONNECT™ MODULE  
Each Quick Connect Module™ has a 50-pin card edge connector  
on one side and an ethernet interface on the other. The instructions  
below describe how to remove the existing QuickConnect™ Module  
and how to install the new IM1/I4 module. If your base unit does not  
have an existing QuickConnect™ already installed, please skip to sec-  
tion 4.1.2.  
1) Bit Rate: The DTE rate setting of your base unit corresponds  
to the throughput of your IM1/14 bridge module. Use higher  
speeds to allow maximum throughput to your extended LAN.  
NOTE: The IM1/14 only supports synchronous speeds.  
4.1.1 Removing the Existing QuickConnect™ Module  
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.  
1) Turn the power switch off. Leave the power cord plugged into  
a grounded outlet to keep the unit grounded.  
2) Loosen the two thumbscrews on the module by turning them  
counterclockwise.  
BASE UNIT CLOCK MODES  
Unit “A”  
Unit “B”  
3) Grasp the two thumbscrews and gently pull the module from  
the unit. Apply equal force to the thumbscrews to keep the  
module straight during the removal process  
Internal Clock Setting  
Receive Recover Clock Setting  
NOTE: Unit “A” and Unit “B” are arbitrarily chosen. It does not matter which  
unit is “A”, and which is “B”.  
3) All other base unit settings depend upon your application and  
on the application medium (twisted pair or coaxial cable)  
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4.2 CONNECTING TO THE 10BASE-T ETHERNET PORT  
4.1.2 Installing the New QuickConnect™ Module  
The RJ-45 Ethernet port on Model IM1/I4 is designed to connect  
directly to a 10BaseT network. Figure 5, below, shows the 10BaseT  
RJ-45 port pin description. You may make connections up to 330 feet  
using Type 4 or 5 cable.  
1) Make sure the power switch on the base unit is off. Leave the  
power cord plugged into a grounded outlet to keep the unit  
grounded.  
2) Hold the module with the faceplate toward you and align the  
module with the guide slots in the rear panel of the base unit.  
1 RD+ (data input to IM1/I4)  
2 RD- (data input to IM1/I4)  
3 TD+ (data output from IM1/I4)  
4 (no connection)  
5 (no connection)  
6 TD- (data output from IM1/I4)  
7 (no connection)  
1
2
3
4
5
6
7
8
3) While keeping the module’s faceplate parallel with the base unit  
rear panel, slide the module straight in–so that the card edge  
contacts line up with the socket inside the chassis. Figure 4  
(below) shows how a Quick Connect Module plugs into the rear  
of the base unit.  
8 (no connection)  
Figure 5. 10BaseT RJ-45 Port Pin Description  
4.2.1 Connecting the Hub Ports to Workstations  
The Model IM1/I4 10Base-T hub interfaces are configured as DCE  
(Data Circuit Terminating Equipment). Therefore, it “expects” to con-  
nect to a 10Base-T workstation using a straight-through RJ-45 cable.  
Use the diagram below to construct a cable to connect the IM1/I4 to a  
workstation.  
IM1/I4  
RJ-45 Pin No.  
1 (RD+)  
10BaseT Workstation  
RJ-45 Pin No.  
1 (TD+)  
Figure 4. Installation of Model IM1/I4 Plug-in Serial Interface Module  
2 (RD-)  
2 (TD-)  
3 (TD+)  
6 (TD-)  
3 (RD+)  
6 (RD-)  
NOTE: The card edge connector should meet the socket when  
it is almost all the way into the chassis. If you encounter a lot  
of resistance, remove the module and repeat steps 2 & 3.  
4.2.2 Connecting the Hub Ports to a Hub (DCE)  
The Model IM1/I4 10Base-T interface is configured as DCE (Data  
Circuit Terminating Equipment). If you wish to connect the IM1/I4  
10Base-T ports to another hub (or a 10Base-T port that “looks like” a  
hub), refer to the diagram below to construct a 10Base-T “crossover”  
cable.  
4) With the card edge contacts aligned with the socket, firmly seat  
the module by using your thumbs to apply pressure directly to  
the right and left edges of the module faceplate. Applying mod-  
erate and even pressure should be sufficient to seat the mod-  
ule. You should hear it “click” into place.  
IM1/I4  
Hub  
RJ-45 Pin No.  
1 (RD+)  
2 (RD-)  
RJ-45 Pin No.  
1 (RD+)  
2 (RD-)  
5) To secure the module in place, push the thumbscrews into the  
chassis and turn the screws clockwise to tighten.  
3 (TD+)  
6 (TD-)  
3 (TD+)  
6 (TD-)  
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4.3 CONNECTION TO THE LINE INTERFACE MEDIA  
5.0 OPERATIO  
N
Instructions for connecting the line interface media (twisted pair, or  
fiber optic cable) are contained within the base unit user manual.  
Please refer to the base unit manual for connection details.  
Once the Model IM1/14 is installed, it should operate transparent-  
ly. This sections describes power-up, general operating instructions,  
and the LED status monitors.  
5.1 OPERATING INSTRUCTIONS  
4.4 CONNECTING TO AC OR DC POWER  
Instructions for connecting the power supply Universal Interface  
AC Power Supply and DC Power Supply option) are contained within  
the base unit user manual. Please refer to the base unit manual for  
connection details.  
In order to operate, the Model IM1/I4 must be installed in the base  
unit. It also requires a 10Base-T connection. After power is applied,  
the IM1/I4 automatically starts performing the bridging function without  
further user intervention. MAC addresses discovered are automatically  
loaded into the MAC address table. They are automatically deleted  
from the MAC address table if they experience an inactivity of 8 min-  
utes.  
WARNING! The Model IM1/I4 interface card has been  
specifically designed to work with UI and DC versions of  
Patton Electronics base units. Use with 120/230VAC ver-  
sions could result in damage to the unit. If you are unsure  
of your base unit power supply, please contact Patton  
Electronics technical support at (301) 975-1007 or at sup-  
5.2 POWER-UP  
Before applying power to the IM1/I4, please be sure it is properly  
installed in the base unit. Then make sure that unit is connected to  
the appropriate power source (Universal Interface AC Power Supply  
or DC Power Supply). Then power-up the base unit using the rear  
power switch .  
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5.3 LED STATUS MONITORS  
COL [Yellow] - On pulse indicates that collisions are detected in  
the LAN.  
The Model IM1/I4 features two LEDs that monitor general operat-  
ing status and the 10Base-T twisted pair link integrity. Figure 6 (below)  
shows the LEDs located directly beneath the RJ-45 jack. Following  
Figure 6 is a description of each LEDs function.  
TP2 [Green] - On indicates that port 2 is receiving link integrity or  
a packet.  
WANF [Yellow] - On indicates that a WAN failure has occurred. A  
WAN failure is defined to be any of the following:  
Quick-Connect Interface Module  
• No WAN CTS or DCD Signal  
• WAN Receive Frame(s) Too Large  
• WAN Receive Frame(s) Not Octet Aligned  
• WAN Receive Frame(s) Aborted  
• WAN Receive Frame(s) With Bad CRC  
WANF  
BSAT TP4  
TP3  
SYS  
TP1 COL  
TP2  
Figure 6. Model IM1/I4 Panel Showing RJ45 Jacks and LEDs  
The WANF LED is on while the condition(s) persist. After all con-  
ditions are removed the WANF LED continues to be on for 60  
seconds after the failure condition(s) are represented on the SYS  
LED.  
SYS [Yellow] - Pulses on to indicate one of eleven conditions.  
They are as follows:  
TP3 [Green] - On indicates that port 3 is receiving link integrity or  
a packet.  
1 Pulse = Status OK  
2 Pulses = Detected No LAN Source MAC Addresses  
3 Pulses = Detected No WAN CTS or DCD Signal  
4 Pulses = Detected Buffer Saturation  
5 Pulses = Detected WAN Receive Frame(s) Too Large  
6 Pulses = Detected WAN Receive Frame(s) Not Octet  
Aligned  
7 Pulses = Detected WAN Receive Frame(s) Aborted  
8 Pulses = Detected WAN Receive Frame(s) With Bad CRC  
9 Pulses = Detected LAN Receive Frame(s) Too Large  
10 Pulses = Detected LAN Receive Frame(s) Not Octet  
Aligned  
BSAT [Yellow] - On indicates that all buffer memory reserved for  
user data has been saturated (used up). This condition may exist  
for only a brief moment and is completely recoverable. After the  
buffer saturation condition is removed the BSAT LED continues to  
be on for 60 seconds after the buffer saturation condition is repre-  
sented on the SYS LED.  
TP4 [Green] - On indicates that port 4 is receiving link integrity or  
a packet.  
11 Pulses = Detected LAN Receive Frame(s) With Bad CRC  
A given status code will be displayed 8 times until another status  
code will be displayed. The unit will check all status conditions  
attempting to indicate as many status codes as possible in  
sequential order. After a status code is displayed 8 times and the  
associated condition is removed the status code will no longer  
appear.  
TP1 [Green] - On indicates that port 1 is receiving link integrity or  
a packet.  
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APPENDIX B  
APPENDIX A  
IM1/I4 INTERFACE PIN ASSIGNMENT  
PATTON MODEL IM1/I4 SPECIFICATIONS  
10BASE-T Interface Pin Description  
(RJ-45 Female Connector)  
(Hub Configuration)  
LAN Connection:  
RJ-45, 10Base-T, 802.3 Ethernet  
Protocol:  
PPP (RFC 1661) with Bridging Control  
Protocol (RFC 1638)  
Pin #  
Signal  
MAC Address Table Size:  
MAC Address Aging:  
4096 entries  
1
2
3
4
5
6
7
8
RD + (data input to IM1/I4)  
RD - (data input to IM1/I4)  
TD + (data output from IM1/I4)  
no connection  
no connection  
TD - (data output from IM1/I4)  
no connection  
MAC addresses deleted after 8 min-  
utes inactivity  
On-board Memory:  
Frame Latency:  
Interface:  
1 MB RAM; 128 KB FLASH  
1 frame  
no connection  
card-edge connection to  
QuikConnect™ port on Patton base  
unit  
Base Unit Compatibility:  
LED Indicators:  
1092, 1092A, 1093, 1094, 1094A,  
1095, 1184, and 1185  
SYS, TP1, COL, TP2, WANF, TP3,  
BSAT, and TP4  
Power Supply:  
+5 Volts @ 510 mA supplied to module  
by connection to Patton QuikConnect  
interface  
Temperature Range:  
Dimensions:  
Weight:  
32 to 122ºF (0 to 50º C)  
2.9" x 3.2" (7.4 cm x 8.1 cm)  
0.25 lb (0.11 kg)  
© Copyright 2000  
Patton Electronics Company  
All Rights Reserved  
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