Caution ¯ Before you install an Internetwork Router (IRX), read Chapter 2, "Preparing for Installation."

Desktop Installation

Rack-mounting

RACK-1 Rack-mount Installation

Note ¯ Included with the rack mount unit are four (4) 12-24x1/2" pan head screws and four (4) #4x3/4" sheet metal screws.

1. Lay the IRX upside down on a protected table surface, with the front of the IRX approximately 1/4" over the front edge of the table.

2. Unscrew (counter-clockwise) the black plastic screws that secure the feet to the bottom of the IRX.

Retain the feet (and the center expansion sleeve in each foot) in place on the bottom of the IRX.

The front of the IRX case sits about 1/8" in front of the mounting shelf flanges.

5. Turn the unit right side up by lifting from the front and rear of the IRX.

6. Install the unit in the rack with the four 12-24x1/2" pan head screws.

Overview of LEDs

Figure 3-1 IRX-114 LEDs

Table 3-1 LED Descriptions

LED	Description
System	This LED (adjacent to the five-section DIP switch) provides three types of diagnostic information: During initial hardware self-test, the LED blinks three times per second. After the power-on self-test is successfully completed, and while the operating system is loading, the LED blinks at one-second intervals. When the system is fully operational, the LED remains on, blinking off once every five seconds.
Link	This LED (the top of two LEDs adjacent to the Ethernet port) is on when the system has link integrity to a 10BaseT hub.
Network	This LED (the bottom of two LEDs adjacent to the Ethernet port) blinks to indicate Ethernet traffic. During heavy traffic, this light may appear solid, due to its rapid blinking.

Overview of Connectors and DIP Switches

• Power switch, user-serviceable fuse, and AC power receptacle.

• An asynchronous serial port, also usable as a console port (S0)

• Five-section DIP switch.

• One to four synchronous serial ports, each with a switch for RS-232 or V.35 signalling.

• Ethernet port (ether0) with connectors for 10BaseT, AUI or BNC cabling. The IRX-211 also has a second Ethernet port (ether1).

Figure 3-2 IRX-114 Rear Panel

 Figure 3-3 shows the IRX-211 rear panel, with pointers to ports and DIP switches.

Figure 3-3 IRX-211 Rear Panel

Power Receptacle

Caution ¯ Before you apply power, refer to "Safety Recommendations" on page 2-1 and "Power Guidelines" on page 2-4.

To apply power:

1. Attach the power cord to the IRX and to a properly grounded electrical outlet.

2. Set the power switch to the ON position.

To disconnect power:

1. Set the power switch to the OFF position.

2. Detach the power cord from the outlet and the IRX.

Fuses

1. Set the power switch to the OFF position.

2. Detach the power cord from the IRX.

3. Insert a 3/16" flat-head screwdriver between the fuse door and the chassis and gently pry the door open, as shown in Figure 3-4.

Figure 3-4 Changing Fuses on the IRX

4. Replace the 250V, 2A fuse.

The fuse is easily removed and replaced and has no "wrong end."

6. Reattach the power cord to the IRX.

7. Set the power switch to ON.

Five-Section DIP Switch

• DIP switch #1 controls the diagnostic mode.

When UP, the IRX boots in diagnostic mode. When DOWN, the IRX boots in normal mode. Default is DOWN. For information about the diagnostic mode, refer to "Boot Sequence in Diagnostic Mode" on page 4-5.

• DIP switch #2 controls the boot mode.

When UP, the IRX boots from the network using RARP and TFTP. When DOWN, it boots from internal flash memory. Default is DOWN.

For more information about using TFTP to boot the IRX, refer to the PortMaster Configuration Guide.

• DIP switch #3 is reserved for future use and should be left DOWN.

• DIP switches #4 and #5 select the Ethernet network type for ether0.

When both DIP switches are UP, the IRX connects through the 10BaseT Ethernet port. When both DIP switches are DOWN, it connects through the BNC Ethernet port. When DIP switch #4 is DOWN and DIP switch #5 is UP, the IRX connects through the AUI port.

Note ¯ The IRX-211 has two additional DIP switches next to the ether1 port, which select the Ethernet network type for ether1 in the same way DIP switches #4 and #5 do for ether0.

Warning ¯ When changing the position of the Ethernet DIP switches, power must be off.

Figure 3-5 IRX-211 DIP Switches

Note ¯ As shown in Figure 3-5, DIP switches #4 and #5 are DOWN, selecting the BNC port for connection to ether0.

S0 (Console) Port

• To connect to a terminal (DTE), use a null modem cable, typically male-to-female.

• To connect to a modem (DCE), use a male-to-male straight-through cable.

When DIP switch #1 is DOWN, the S0 port operates as an async port, using its configured settings.

The async port (S0) uses a 25-pin D-type female connector, providing all RS-232 signals under the enhanced RS-423 standard. The connection is configured as a DTE (Data Terminal Equipment).

For cabling specifications, refer to Appendix B, "Cabling Specifications."

Synchronous Port

• RS-232 signalling supports speeds up to 56K. If the device at the other end of the cable supports RS-423 signalling, speeds up to 128K can be used.

• V.35 signalling supports speeds up to T1/E1.

For cabling specifications, refer to Appendix B, "Cabling Specifications."

Caution ¯ The synchronous ports will not function as asynchronous ports. Do not connect asynchronous devices to these ports.

Ethernet 10BaseT Port

On the IRX-211, ether1 uses the RJ-45 jack if both switches of the two-section DIP switch are UP.

Ethernet AUI Port

On the IRX-211, ether1 uses the AUI port if the left switch of the two-section DIP switch is DOWN and the right switch of the two-section DIP switch is UP.

Ethernet BNC Port

On the IRX-211, ether1 uses the BNC connector if both switches in the two-section DIP switch are DOWN.

Connecting to the Network and Console

1. Set the power switch on the IRX to OFF.

2. Attach a RS-232 null modem cable to IRX port S0 and the serial port of a PC or ASCII terminal.

Warning ¯ Before you apply power, refer to "Safety Recommendations" on page 2-1 and "Power Guidelines" on page 2-4.

3. Attach the power cord to the IRX and to a properly grounded electrical outlet.

4. Connect the 10BaseT, AUI, or BNC Ethernet port on the IRX to an Ethernet hub or transceiver, using the appropriate cable. For information on switching the Ethernet DIP switches, refer to "Five-Section DIP Switch" on page 3-7.

If using an IRX-211, also connect ether1 and set the two-section DIP switch.
The Ethernet cable does not come with the IRX.

6. Verify that the System LED is active.

While the IRX is booting, the LED blinks three times per second, then once per second. The LED blinks OFF once every five seconds during normal operation.

If the System LED does not behave in this way, refer to "Hardware Problems and Solutions" on page 4-1.

The Link LED comes on blinking once for AUI and twice for 10BaseT. Solid ON indicates 10BaseT link integrity exists. Solid OFF indicates link error for 10BaseT. Link LED is not used for the AUI or BNC connectors.

If the Link LED does not behave in this way, refer to "Hardware Problems and Solutions" on page 4-1.

The Network LED comes on blinking once for every packet transmitted or received. In heavy traffic situations, the LED may appear solid.

If the Network LED does not behave in this way, refer to "Hardware Problems and Solutions" on page 4-1.

login:

10. Enter the address of the Ethernet interface.

a. If you are entering an IP address, type the following, pressing [Enter] after each line. Replace the italicized values with the appropriate values for your network.

login: !root Password: [Enter] Command> set ether0 address 172.168.200.1 Command> save all Command> quit login:

b. If you are entering an IPX address, type the following:

login: !root Password: [Enter] Command> set ether0 ipxnet AFAF0808 Command> set ether0 ipxframe ethernet_802.2 Command> save all Command> quit login:

11. If you are planning to use the command prompt interface to configure your IRX, do so now. If you are planning to use PMconsole to configure your IRX, you can disconnect the terminal from the S0 port now.

For configuration information, refer to the PortMaster Configuration Guide.

Installing an IRX Expansion Card

Caution ¯ Do not unpack components or open the case of the IRX without using a wrist strap for control of static electricity. Review

1. Set the power switch to the OFF position and disconnect the IRX from the AC power source.

2. Open the IRX case.

Remove the screw at the center of the top rear edge, then slide the top of the IRX case forward 1/2" horizontally and lift straight up. If difficulty is encountered in separating the top and bottom sections of the IRX case, try pressing down on the top edge sides and exerting a sudden push.

4. Insert the expansion card at a slight angle into the empty Dsub port holes.

Align the 40-pin connector projecting from the bottom of the expansion board with the corresponding connector on the main board. When inserting the 40-pin connector, support the free edge of the board (the side closest to the front) with your hand, so that the main board does not bend excessively.

Screw(s) should be partially screwed in and the face plate(s) aligned before tightening any of the screws.

7. Connect the IRX to the AC power source and set the power switch to the ON position.

Removing an IRX Expansion Card

Caution ¯ Do not unpack components or open the case of the IRX without using a wrist strap for control of static electricity.
Review

1. Set the power switch to the OFF position and disconnect the IRX from the AC power source.

2. Open the IRX case.

Remove the screw at the center of the top rear edge, then slide the top of the IRX case forward 1/2" horizontally and lift straight up. If difficulty is encountered in separating the top and bottom sections of the IRX case, try pressing down on the top edge sides and exerting a sudden push.

4. Install the blank cover plates with the original screws.

The screws, which mount the expansion face plate(s), should be partially screwed in and the expansion face plate(s) aligned before tightening any of the screws.

Place the bag between foam in a box. The expansion board can now be shipped or stored.

7. Connect the IRX to the AC power source and set the power switch to the ON position.