RouterBOARD 751 Series User's Manual
5
Booting options
RouterOS
is the operating system of all RouterBOARD routers. Please see detailed configuration guide here
http://wiki.mikrotik.com/wiki/Category:Manual
Initial configuration includes the following:
wirelesss AP with SSID „MikroTik” has been enabled, and bridged to ports Ether2-Ether5. This bridge
has a DHCP server runni ng, so you can connect to the devide using the Web based „
Webfig
” interface
from Ether2-Ether5 or from the wireless interface. Open
http://192.168.88.1
in your browser, in the
page that opens, select „
Webfig
” and log in with username „admin” and no password. The Ether1 port
has a firewall on it, and a DHCP client, so it’s configured to be connected to your ISP.
An alternative configuration option is the
MikroTik Winbox utility
(Windows only). Winbox can be used to
connect to the default IP address of 192.168.88.1 with the username
admin
and no password.
In case you wish to boot the device from network, for example to use MikroTik Netinstall, hold the RESET
button of the device when starting it until the LED light turns off, and the device will start to look for Netinstall
servers. In case IP connection is not available, Winbox can also be used to connect to the MAC address of the
device. More information here:
http://wiki.mikrotik.com/wiki/First_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 network
Network boot works similarly to PXE or EtherBoot protocol, and allows you to the device from an executable
image stored on a TFTP server. It uses BOOTP or DHCP (configurable in boot loader) protocol to get a valid IP
address, and TFTP protocol to download an executable (ELF) kernel image combined with the initial RAM disk
(inserted as an ELF section) to boot from (the TFTP server's IP address and the image name must be sent by
the BOOTP/DHCP server).
To boot the RouterBOARD computer from Ethernet network you need the following:
An ELF kernel image for the loader to boot from (you can embed the kernel parameters and initrd image
as ELF sections called
kernparm
and
initrd
respectively)
A TFTP server which to download the image from
A BOOTP/DHCP server (may be installed on the same machine as the TFTP server) to give an IP address,
TFTP server address and boot image name
Operating System Support
MikroTik RouterOS starting from version v5 is fully compatible with RouterBOARD 751 series devices. If your
device is preinstalled with an earlier RouterOS release, please upgrade RouterOS to v5.8 or newer.
