I put up two new Router Boards with 2.8.11. One is a 5.8 link to the tower about a half mile away and the other is 270 feet up the tower. The tower MT has 4 SL-5354MP miniPCI radios and 2 NL-2511CD+EXT2 PCMCIA radios. We have about 324 feet of Cat5e run to the MT for POE.
Ok, now you have a basic idea of the system.
Now comes the problem, we have had this system running for one week and the tower MT has had to be rebooted every 12 to 24 hours and the office uplink MT has be rebooted every 24 to 48 hours.
Can someone please tell me what is going on with these POSs.? I have setup the watch dog to auto reboot but that is not a good fix.
We are routing and that is it, nothing else is being doen with these MTs.
We need some help or we are going to have to drop the MT from our network and go with some solid radios.
You should send support-output files from the RouterBoards to support@mikrotik.com
Read how to make one:
http://www.mikrotik.com/docs/ros/2.8/system/support.main
You should be using only the integrated power injector – not the regular RB51.
John
I am using a 48v 420miliamp 3Com POE injecter that came with the unit from Wisp-Router.com. And that is pluged into the PoE ether port on the router board.
I don’t know if the 3com injectors have a problem with that much power or not. If you can connect a 48v power block directly to the routerboard (no POE), then you can find out. We will soon have a 25W injector module that can be used with our 30W power block.
It could be just too much to have the 200mW PCMCIA cards with the four radios – but we have to test this. Six radios is allot and the pcmcia cards are using more power than each of the Atheros cards. We have not tested such a config for an extended time.
John
I can try that on the office uplink but the tower MT is 270 feet up and there is no AC power up there, Nor will they let use run AC power up there.
Hi, jober
There is a label on a power supply, that comes with a MT router: max length of a Ethernet+Power cable - 60 m (~180 feet). I think the problem can be here.
Try to use a separate 2x0.75 sq.mm. or thicker cable to deliver 48VDC to the router instead of using PoE. There is a separate jack on a RouterBoard “48Vdc” and a jumper “PoE - Separate” (or something like this) near the RG45 PoE jack.
Vadim.
This label is on the intergrated power supply (RB53) because the POE detection introduces some interference for the Ethernet signals and they generally can’t go over 60m with this interference. Our RB51 goes 150m and the new 25W RB52 will also go 150m.
John
[quote="tully"This label is on the intergrated power supply (RB53) because the POE detection introduces some interference for the Ethernet signals and they generally can’t go over 60m with this interference. Our RB51 goes 150m and the new 25W RB52 will also go 150m.
John[/quote]
Jober wrote: “The tower MT has 4 SL-5354MP miniPCI radios and 2 NL-2511CD+EXT2 PCMCIA radios. We have about 324 feet of Cat5e run to the MT for POE”
I think the problem can be caused by power loses in the cable. Jober’s router conttains 6 radio cards. It is a serious load, near to the maximum alllowed by the power supply.
25W/48V is about 0.5 Amp current, that runs over 2x0.09 sq.mm wire. Despite the power supply produces stable 48V , the voltage at the another end of the cable can float significantly acording to the changes of the load. Try to monitor the voltages in “System health” window of winbox or by command “system routerboard health print interval 2” on console. If these voltages are lower than required, and floats at high traffic, this can be the cause of a problem.
WBR,
Vadim