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RouterBOARD 751 series 

User's Manual 

 

Copyright and Warranty Information 
 

Copyright and Trademarks. Copyright MikroTikls SIA. This manual 
contains information protected by copyright law. No part of it may be 
reproduced or transmitted in any form without prior written 
permission from the copyright holder. RouterBOARD, RouterOS, 
RouterBOOT and MikroTik are trademarks of MikroTikls SIA. All 
trademarks and registered trademarks appearing in this manual are 
the property of their respective holders. 

Hardware

. MikroTik warrants all RouterBOARD series equipment for the term of fifteen (15) months from the 

shipping date to be free of defects in materials and workmanship under normal use and service, except in case 
of damage caused by mechanical, electrical or other accidental or intended damages caused by improper use 
or due to wind, rain, fire or other acts of nature. 

To return failed units to MikroTik, you must perform the following RMA (Return Merchandise Authorization) 
procedure. Follow the instructions below to save time, efforts, avoid costs, and improve the speed of the RMA 
process. 

1.

 

If you have purchased your product from a MikroTik Reseller, please contact the Reseller company 
regarding all warranty and repair issues, the following instructions apply ONLY if you purchased your 
equipment directly from MikroTik in Latvia. 

2.

 

We do not offer repairs for products that are not covered by warranty. Exceptions can be made for 
RB1000, RB1100, RB1200. 

3.

 

Out-of-warranty devices and devices not covered by warranty sent to Mikrotikls will be returned to 
the sender at sender's cost. 

RMA Instructions are located on our webpage here: 

http://rma.mikrotik.com

 

Manual

. This manual is provided “as is” without a warranty of any kind, expressed or implied, including, but 

not limited to, the implied warranty of merchantability and fitness for a particular purpose. The manufacturer 
has made every effort to ensure the accuracy of the contents of this manual; however, it is possible that it may 
contain technical inaccuracies, typographical or other errors. No liability is assumed for any inaccuracy found 
in this publication, nor for direct or indirect, incidental, consequential or other damages that may result from 
such an inaccuracy, including, but not limited to, loss of data or profits. Please report any inaccuracies found to 

[email protected]

 

 

 

Summary of Contents for RouterBoard 751 series

Page 1: ...f the RMA process 1 If you have purchased your product from a MikroTik Reseller please contact the Reseller company regarding all warranty and repair issues the following instructions apply ONLY if you purchased your equipment directly from MikroTik in Latvia 2 We do not offer repairs for products that are not covered by warranty Exceptions can be made for RB1000 RB1100 RB1200 3 Out of warranty de...

Page 2: ...thernet ports 4 LEDS 4 USER S GUIDE 4 POWERING 4 BOOTING OPTIONS 5 Onboard NAND Storage Device 5 Booting from network 5 Operating System Support 5 BUTTONS AND JUMPERS 6 WIRELESS DEVICE 6 ROUTERBOOT 6 BOOT LOADER CONFIGURATION 6 BOOT LOADER UPGRADING 6 PRIMARY BOOT LOADER 6 ROUTEROS FUNCTIONS 7 FIRMWARE INFORMATION 7 FIRMWARE SETTINGS 7 APPENDIX 7 CONNECTOR INDEX 7 BUTTON INDEX 8 ETHERNET CABLES 8 ...

Page 3: ... Five 10 100 1000 Gigabit ports with Auto MDI X MiniPCI slot Expansion USB 2 0 port CompactFlash slots Serial port LEDs Power NAND activity 5 Ethernet and 1 wireless LEDs Beeper Power at the device DC power jack 5 5mm outside and 2mm inside diameter female pin positive plug accepts 8 30V DC Power over Ethernet Ether 1 requires 8 30V DC non 802 3af to compensate for losses it s recommended to use 1...

Page 4: ...ether by an option in the RouterOS software All cables made to EIA TIA 568A B cable specifications will work correctly see Connector Index for pinout Note that this port supports automatic cross straight cable correction Auto MDI X so you can use either straight or cross over cable for connecting to other network devices LEDs Ethernet LED lights up when a cable is connected these LEDs don t show e...

Page 5: ...irst_time_startup Onboard NAND Storage Device The RouterBOARD may be started from the onboard NAND storage chip As there is no partition table on the device the boot loader assumes the first 4MiB form a YAFFS filesystem and executes the file called kernel stored in the root directory on that partition It is possible to partition the rest of the medium by patching the kernel source Booting from net...

Page 6: ...ilt in Chain1 antenna RouterBOOT The RouterBOOT firmware also referred as Bootloader here provides the basic functionality to boot an Operating System It supports serial console via the onboard serial port at the boot time The loader supports booting from the onboard NAND device and from a network server see the respective section for details on this protocol Boot Loader Configuration This device ...

Page 7: ... routerboard upgrade command Firmware Settings Boot loader settings are also accessible through this menu admin MikroTik system routerboard settings print boot delay 2s boot device nand if fail then ethernet boot protocol bootp enable jumper reset yes admin MikroTik Boot device use this to enable Netinstall Boot protocol for Netinstall use Bootp for installing other operating systems you need to u...

Page 8: ... Ethernet Cables RJ45 Pin Color Function 100Mbit Function 1Gbit RJ45 pin for Straight cable MDI EIA TIA568A RJ45 pin for Crossover cable MDI X EIA TIA568B 1 Green TX Data Data A 1 3 2 Green White TX Data Data A 2 6 3 Orange RX Data Data B 3 1 4 Blue Data C 4 4 5 Blue White Data C 5 5 6 Orange White RX Data Data B 6 2 7 Brown Data D 7 7 8 Brown White Data D 8 8 ...

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