I have 3 RB411A running off a 13V power supply. Two have XR5 and one has XR2. They are all connected to one switch and are powered via the DC plug.
The one that has the XR2 been rebooting non stop for 24 hours.
It boots up, sends out a beacon or two, and then reboots. Then it boots up again, sends out a beacon, and reboots.
It was running fine for 3 months but suddenly started doing this yesterday.
I unplugged the power, waited 2 minutes, and plugged it back in. The routerboard ran for 5 seconds and then started rebooting non stop again.
I did that 4 more times, but got less than 1 second out of it.
If ping it, I get 99% packet loss (because of a couple of packets it sends out just after it boots and before it reboots again).
Any idea what’s going on?
Is it a hardware or a software problem?
remove the wireless cards and start it. if doesn’t help, unplug also the ethernet and start it. if still doesn’t help, plug in the serial port and see what is the output just before restart. maybe there will be some error shown.
Hi, are you upgrade RouterOS before RB start rebooting? Reset RouterOS configuration set TX-power=1 and then enable it. Then step by step increase TX-power. Else try RB with other XR2
If you are so quick try connect via telnet and type /system reset-config then “y” If you don’t have serial cable at the bottom I don’t have more idea )
I’d try a different power supply.
18 volts preferably.
I know it’s been working for months but your at the low end of the voltage requirement.
Assuming the tower is ~150 feet, you’re only getting about 10-11 volts to the units.
XR’s are power hungry devices.
I have 3 RB411A running off a 13V power supply.
Is that 3 power supplies or 1 power supply for all 3 boards?
I measured 12.6V at the DC plug. There are 2 other routerboards less than 5 feet away that are running fine, even at max TX power. The PSU can do over 100W so there is no lack of power. One power supply for all 3 boards, which are wired in parallel.
Still don’t want to climb??
Since it’s rebooting too often to login, I don’t see much choice.
If you could get logged in, the first thing I’d try is disabling the wireless card.
If that didn’t help, I’d try to reload the o/s by upgrading to 3.22.
But…if you can’t log in…get another board ready and get to climbing.
Connect an ethernet tester at the bottom before you head up…you might find an ethernet problem when you get up there.
Am I correct in assuming that the power is supplied via the ethernet cable and then tapped off to the dc jack?
I’m still leaning toward a power problem…seen the same problem more than once with those rj45-ecs adapter that tend to let water in, corroding ethernet connector and causing all sorts of weid $&!^ to happen.
I had this issue on a rb433ah and 1x xr5 and 2 x sr5. For me it was power consumption of the cards as lowering the TX power on the xr5 solved it for me.
Does the rb433ah have enough mini PCI power to supply those cards?
Also does anyone know a board that will take 4 of them?
In my case, it was an electrical problem like some of you suspected.
The board stopped working completely so I went up to have a look at it.
A 10cm length of the negative wire leading up to the DC jack looked like it went thru a fire.
I can understand how the positive could get overheated (if there is a short to ground somewhere) but the negative wire melting is plain weird.
I replaced the wire and the routerboard has been running just fine for 2 weeks.
)