This appendix provides information about serial and Ethernet cables used in SGIconsole installations, and provides pinouts for the ports on the managed systems.
This appendix describes the pin assignments for the following items:
This section describes some of the serial cables and serial adapters used in an SGIconsole installation.
This section lists the pin assignments for an RJ-45 to DB-9 serial cable (see Figure B-1), which is needed to connect the Silicon Graphics Ethernet serial port server to the DB-9 serial port on the SGI Origin 200, the SGI 2000 series server, the Silicon Graphics Onyx2 deskside workstation, and the Silicon Graphics Onyx2 rackmount graphics system.
This section lists the pin assignments for an RJ-45 to a DB-9 serial adapter (see Figure B-2), which can be used with a standard RJ-45 to RJ-45 twisted-pair cable as an alternative to the RJ-45 to DB-9 cable. This cabling is needed to connect the Silicon Graphics Ethernet serial port server to the DB-9 serial port on the SGI Origin 200, the SGI 2000 series server, the Silicon Graphics Onyx2 deskside workstation, and the Silicon Graphics Onyx2 rackmount graphics system.
Table B-1 shows the RJ-45 to DB-9 serial adapter pin assignments.
Table B-1. RJ-45 to DB-9 Serial Adapter Pin Signals
RJ-45 Signals | RJ-45 Pins | DB-9 Pins | DB-9 Signals |
|---|---|---|---|
Request to send (RTS) | 1 |
|
|
Data set ready (DSR) | 2 |
|
|
Data carrier detect (DCD) | 3 |
|
|
Receive data (RxD) | 4 | 3 | Transmit data (TxD) |
Transmit data (TxD) | 5 | 2 | Receive data (RxD) |
Ground (GND) | 6 | 5 | Ground (GND) |
Data terminal ready (DTR) | 7 |
|
|
Clear to send (CTS) | 8 |
|
|
(Not connected) | 9 |
|
|
This section lists the pin assignments for an RJ-45 to DB-9 serial cable with flow control (see Figure B-3), which is needed to connect the Silicon Graphics Ethernet serial port server to the DB-9 serial port on the SGI Origin 300 server without NUMAlink Module and on the SGI Origin 3200 server without L2.
This section lists the pin assignments for an RJ-45 to a DB-9 serial adapter with flow control (see Figure B-4), which can be used with a standard RJ-45 to RJ-45 twisted-pair cable as an alternative to the RJ-45 to DB-9 cable. This cabling is needed to connect the Silicon Graphics Ethernet serial port server to the DB-9 serial port on the SGI Origin 200, the SGI 2000 series server, the Silicon Graphics Onyx2 deskside workstation, and the Silicon Graphics Onyx2 rackmount graphics system.
Table B-2 shows the RJ-45 to DB-9 serial adapter with flow control pin assignments.
Table B-2. RJ-45 to DB-9 Serial Adapter With Flow Control Pin Signals
RJ-45 Signals | RJ-45 Pins | DB-9 Pins | DB-9 Signals |
|---|---|---|---|
Request to send (RTS) | 1 | 8 | Clear to send (CTS) |
Data set ready (DSR) | 2 |
|
|
Data carrier detect (DCD) | 3 |
|
|
Receive data (RxD) | 4 | 3 | Transmit data (TxD) |
Transmit data (TxD) | 5 | 2 | Receive data (RxD) |
Ground (GND) | 6 | 5 | Ground (GND) |
Data terminal ready (DTR) | 7 |
|
|
Clear to send (CTS) | 8 | 7 | Request to send (RTS) |
(Not connected) | 9 |
|
|
This section describes the Ethernet cables used in an SGIconsole installation and provides guidance in selecting the correct cable for each connection.
When connecting Ethernet hubs, serial port servers, and managed systems to an SGIconsole host system, you will at various times use a “standard” Ethernet cable and at other times use a “crossover” Ethernet cable. This section explains the difference between the two types of cables and explains when you would use each type.
Ethernet over twisted pair wires, officially called 10-BaseT (the 10 Megabits/second version) or 100-BaseTX (100 Mb/s version), is a point-to-point protocol. This means that each twisted pair Ethernet cable connects exactly two devices, no more.
The RJ-45 Ethernet jack in each of these two device has a pair of contacts for transmit (to transmit data to the other computer) and a pair of contacts for receive (to receive data from the other computer), as shown in Figure B-6. Note that though the RJ-45 jack has eight contacts, the twisted pair Ethernet standards only uses four of them.When any two twisted-pair Ethernet devices are connected together, they will only communicate if the transmit contacts on one device are “crossed over” in order to connect to the receive contacts on the other, and vice versa, as shown in Figure B-5.
Two “crossovers” cancel each other out. Thus three crossovers are effectively the same as one crossover. More generally, a combination that includes any odd number of crossovers is effectively the same as a single crossover, and a combination that includes any even number of crossovers is effectively the same as a straight-through cable (that is, no crossover).
When connecting two devices, it doesn't really matter where the crossover is, so long as there is one somewhere in the connection. Some devices have this crossover built in to the device. If you use a standard cable to connect a device with a built-in crossover to a device with no built-in crossover, the total number of crossovers is one, and the devices communicate.
If you connect two devices with no built-in crossover, you must use a crossover cable.
Similarly, if you connect two devices that each have built-in crossovers, the two built-in crossovers cancel each other out, and you must use a crossover cable.
Typically computers do not have a built-in crossover in their Ethernet ports. Typically routers, switches, and hubs do have a built-in crossover in their Ethernet ports.
Since a typical installation has computers connected to routers, this allows the use of standard twisted-pair cables for most purposes.
When a computer is connected to another computer, or a router to another router, you will typically have either zero or two crossovers. Either way, you would need to use a crossover cable.
Some routers, switches, and hubs have a dedicated port that can be switched between crossover and straight-through. This is often called an “uplink port,” and the switch is often called an uplink switch.
The pin assignments for a 10-BaseT or 100-BaseTX Ethernet jack are shown in Figure B-6 and described in Table B-3.
Table B-3. RJ45 Ethernet Jack Pin Assignments
Pin | Assignment |
|---|---|
1 | Transmit + (TX+) |
2 | Transmit - (TX-) |
3 | Receive + (RX+) |
4 | Reserved |
5 | Reserved |
6 | Receive - (RX-) |
7 | Reserved |
8 | Reserved |
A standard twisted-pair Ethernet cable is wired the same on both ends, as shown in Figure B-7 and described Table B-4. Though other wiring color codes are occasionally used, the T-568B color codes shown here are the most common.
Table B-4. Typical Color Codes for a Standard Twisted-Pair Ethernet Cable
Pin | T-568B Color Codes (Both Ends) |
|---|---|
1 | White with Orange |
2 | Orange |
3 | White with Green |
4 | Blue |
5 | White with Blue |
6 | Green |
7 | White with Brown |
8 | Brown |
A crossover twisted-pair Ethernet cable is wired differently on each end. Only one end of the cable is wired like a standard twisted-pair Ethernet cable. Though other wiring color codes are occasionally used, the T-568B and T-568A color codes shown in Figure B-8 and described in Table B-5 are the ones most commonly used for crossover Ethernet cables (T-568B on one end, T-568A on the other).
Table B-5. Typical Color Codes for a Crossover Twisted-Pair Ethernet Cable
Pin | T-568B Color Codes (One End) | T-568A Color Codes (One End) |
|---|---|---|
1 | White with Orange | White with Green |
2 | Orange | Green |
3 | White with Green | White with Orange |
4 | Blue | Blue |
5 | White with Blue | White with Blue |
6 | Green | Orange |
7 | White with Brown | White with Brown |
8 | Brown | Brown |
Figure B-9 shows the pin assignments for the serial port connector 1 and serial port connector 2 on the rear panel of the Origin 200 servers.
Table B-6 lists the pin assignments for the serial port pin numbers in RS-232 mode.
Table B-6. Origin 200 Server Serial Port Pin Assignments, RS-232 Mode
Pin | Assignment |
|---|---|
1 | Data carrier detect (DCD) |
2 | Receive data (RXD) |
3 | Transmit data (TXD) |
4 | Data terminal ready (DTR) |
5 | Ground (GND) |
6 | Data set ready (DSR) |
7 | Request to send (RTS) |
8 | Clear to send (CTS) |
9 | (Not connected) |
Table B-7 lists the pin assignments for the serial port pin numbers in the RS-422 mode.
Table B-7. Origin 200 Server Serial Port Pin Assignments, RS-422 Mode
Pin | Assignment |
|---|---|
1 | (Reserved) |
2 | Receive data– (RXD–) |
3 | Transmit data– (TXD–) |
4 | Transmit data+ (TXD+) |
5 | Signal ground (GND) |
6 | Receive data+ (RXD+) |
7 | Output handshake (HSKo) |
8 | Input handshake (HSKi) |
9 | (Reserved) |
This section lists the pin assignments for the following SGI Altix 350, Origin and Onyx 300 and 350 connectors:
DB-9 serial port connector labeled “Console.”
Ethernet connector on the L2 controller hardware (only present in SGI Origin 300 server with NUMAlink Module systems).
Figure B-10 shows the pin number locations and pin assignments for the DB-9 serial port connector on the SGI Altix 350, Origin and Onyx 300 and 350 labeled “Console.”
Figure B-11 shows the pin number locations and pin assignments for the Ethernet connector on the L2 controller hardware for the SGI Origin and Onyx 300 and 350 with NUMAlink Module.
Figure B-12 shows the pin number locations and pin assignments for the DB-9 serial port connectors labeled “tty_2” and “tty_1, Console” on the SGI 2100 and SGI 2200 servers.
This section lists the pin assignments for the following SGI 2400 and SGI 2800 server connectors:
DB-9 serial port connectors labeled “tty_2” and “tty_1, Console.”
Module System Controller (MSC) serial port.
Multimodule System Controller (MMSC) 8-pin mini–DIN connectors.
Figure B-13 shows the pin number locations and pin assignments for the DB-9 serial port connectors labeled “tty_2” and “tty_1, Console.”
Figure B-14 shows the pin locations and assignments for the Module System Controller (MSC) serial port (DB-9 connector).
Figure B-15 shows the MMSC 8-pin mini–DIN connectors.
Figure B-16 shows the pin number locations and pin assignments for the MMSC 8-pin mini–DIN connectors.
This section lists the pin assignments for the following SGI Origin and Altix 3000 series server connectors:
DB-9 serial port connector on the C–brick labeled “Console.”
Ethernet connector on the L2 controller hardware.
Figure B-17 shows the pin number locations and pin assignments for the DB-9 serial port connector on the C–brick labeled “Console.”
Figure B-18 shows the pin number locations and pin assignments for the Ethernet connector on the L2 controller hardware available for the SGI Origin and Altix 3000 series servers.
Figure B-19 shows the pin number locations and pin assignments for the DB-9 serial port connectors labeled “tty_2” and “tty_1, Console” on the Silicon Graphics Onyx2 deskside workstation.
This section lists the pin assignments for the following Silicon Graphics Onyx2 rackmount graphics system connectors:
DB-9 serial port connectors labeled “tty_1 (Console).”
Module System Controller (MSC) serial port.
Multimodule System Controller (MMSC) 8-pin mini–DIN connectors.
Figure B-20 shows the pin number locations and pin assignments for the DB-9 serial port connector labeled “tty_1 (Console).”
Figure B-21 shows the pin locations and assignments for the module system controller (MSC) of the Silicon Graphics Onyx2 rackmount graphics system.
Figure B-22 shows the MMSC 8-pin mini–DIN connectors of the Silicon Graphics Onyx2 rackmount graphics system.
Figure B-23 shows the pin number locations and pin assignments for the MMSC 8-pin mini–DIN connectors of the Silicon Graphics Onyx2 rackmount graphics system.