RJ45 Serial Ports
 

I'm trying to setup a ha cluster. The problem I'm having is I can't get the two machines to talk to each other over a serial connection. I have never uses this type of serial port before and I'm not sure if I'm using the correct cable. I'm using a crossover cable to connect the two machines.

Command I'm using to talk to both machines.
Machine 1:
Cat </dev/ttyS1
Machine 2:
echo test >/dev/ttyS1


Machine 1:
cat /proc/tty/driver/serial
0: uart:16550A port:000003F8 irq:4 tx:0 rx:0 RTS|DTR
1: uart:16550A port:000002F8 irq:3 tx:206 rx:7 brk:7
2: uart:unknown port:000003E8 irq:4
3: uart:unknown port:000002E8 irq:3

Machine 2:
cat /proc/tty/driver/serial
serinfo:1.0 driver revision:
0: uart:16550A port:000003F8 irq:4 tx:0 rx:0
1: uart:16550A port:000002F8 irq:3 tx:2 rx:1 brk:1
2: uart:unknown port:000003E8 irq:4
3: uart:unknown port:000002E8 irq:3

Hey,

I can't offer much help, but I know that you aren't going wrong with the RJ45 crossover cable. That's exactly what you need. I can't help you out with the command, though. Try googling it. www.google.com/linux. The results are presorted so it goes a little faster and a little more accurate.

Regards,

Brandon

You will need a null modem cable to connect another computer up through a serial port. Serial port speed is no faster than 16 kilobytes, so a cluster is going to choke. I suggest using a 1 Gb network on a PCI Extended or PCI Express bus. If you can find a 10 Gb network card, use that instead.

With serial, I suggest using a terminal program to echo text to make sure the other computer can retrieve it.

I can't seem to find a null modem cable with a RJ45 connector . That why I when with crossover cable. All the null modem cable I have find have a nine pin or 25 pin connector. Do you where I could find a null modem cable with a RJ45 connector or a wiring diagram.

Thanks for help

You must find the pinout of the RJ45 and next make up your own RJ45 cables for this. Check the documentation that came with the equipment. It's not a standard (as far as I know)

A standard CAT5 cable (normal or cross) will NOT work.

OK, mistaken. Thanks for the link.