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Table Of Contents
Connecting the NEMI and the DEMI
NEMI to DEMI Connection Procedure
NEMI-Master to NEMI-Slave Connection Procedure
Connecting the NEMI and the DEMI
This chapter describes how to connect the NEMI and DEMI modules used in the Cisco Metro 1500 series system. This chapter includes the following sections:
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NEMI to DEMI Connection Procedure
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Connection Equipment
In addition to the NEMI and DEMI modules themselves, you will need the following materials to complete the physical connections:
For the 16 Channel system:
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For the 24 to 32 Channel system:
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NEMI to DEMI Connection Procedure
The NEMI in the primary chassis is connected to the DEMI located in extension chassis A using an external bus cable that is supplied in the DEMI packaging. The external bus connector cable is shown in Figure 3-1.
Figure 3-1 External Bus Connector Cable
On the DEMI, bus interconnect port two (BUS2) is used to connect the NEMI to the DEMI. The BUS1 port needs to be terminated with the supplied bus terminator to eliminate extraneous noise on the bus. The bus terminator is shown in Figure 3-2.
Figure 3-2 Bus Terminator
For 32 Channel systems, the NEMI-Slave in extension chassis B is connected to the DEMI in extension chassis C in the same manner as described above.
Figure 3-3 shows, how to connect the NEMI-Master or the NEMI-Slave respectively with a DEMI.
Figure 3-3 Connecting a NEMI (Master or Slave) to a DEMI
NEMI-Master to NEMI-Slave Connection Procedure
Cisco Metro 1500 series systems with a total of 24 to 32 Channels require the NEMI-Master to be installed in the primary chassis. The NEMI-Master is then connected to the NEMI-Slave installed in extension chassis B.
Once interconnected, the NEMI modules exchange management and configuration control information across a private IP network. The configuration of this private network is discussed in Chapter 4, "System Configuration."
The physical interconnection of the NEMI modules is called an Inter-NEMI Network Connection (INNC). This connection is made either by connecting the serial ports on the NEMIs using a LapLink cable, or by using the ethernet ports using an ethernet X-cable.
Examples of both types of connections are shown in Figure 3-4 and Figure 3-5.
Figure 3-4 INNC Serial Connection
Figure 3-5 INNC Ethernet Connection
Note
Choosing a Connection Method
If you plan to connect the NEMI to an external network using a terminal server, modem, or other serial interface method, then the INNC connection should be made using the ethernet port with an ethernet X-cable. In this case, the RS-232 port and associated LapLink cable is used later to execute the NEMI software configuration procedures described in Chapter 4, "System Configuration."
If you plan to connect the NEMI to an external network using the ethernet port, then the INNC connection should be made using the RS-232 port and associated LapLink cable. In this case, the ethernet port and an ethernet X-cable are used later to execute the NEMI software configuration procedures described in Chapter 4, "System Configuration."
Installing the INNC Cable
Perform only one of the following cable connection steps based on the choice of INNC connection method previously determined.
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Using an approved LapLink cable with support for all nine signals in the cable, attach one end to the RS-232 port of the NEMI in the primary chassis and secure it with a screwdriver. Attach the other end of the cable to the RS-232 port of the NEMI in extension chassis B and secure it with a screw driver. See Figure 3-4.
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Using an ethernet crossover cable (X-cable), attach one end to the RJ-45 ethernet port of the NEMI-Master in the primary chassis. Attach the other end of the cable to the RJ-45 ethernet port of the NEMI-Slave in extension chassis B. See Figure 3-5.
Posted: Tue Apr 26 05:58:39 PDT 2005
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