RouterBOARD Groove Series User's Manual
5
RouterBOARD Groove series devices are compatible with non‐standard (passive) Power over Ethernet injectors
(except power over data lines) and accept powering over up to 100m (330 ft) long Ethernet cable connected to
the Ethernet port (
J4
). The board
does not
work with IEEE802.3af compliant 48V power injectors.
Expansion Slots and Ports
1.
Built in 2GHz 802.11b/g wireless, 1x1 MIMO, station mode
2.
One 10/100 Ethernet port, supporting automatic cross/straight cable correction (Auto MDI/X), so you
can use either straight or cross‐over cable for connecting to other network devices. The Ethernet port
accepts 8‐30V DC powering from a passive PoE injector.
Buttons and Jumpers
•
RouterOS reset jumper hole (no direct access, board has removed from case) – resets RouterOS
software to defaults. Must short circuit the metallic sides of the hole (with a screwdriver, for example)
and boot the device. Hold screwdriver in place until RouterOS configuration is cleared.
•
RouterBOOT reset button (access through the plastic door) has two functions:
o
Hold this button during boot time until LED light starts flashing,
release the button to
reset RouterOS configuration
(same result as with reset hole)
o
Hold this button during boot time longer, until LED turns off,
then release it to make the device
look for Netinstall servers.
Booting options
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 Groove will start to look for Netinstall
servers.
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
