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| user_guide:mikrotik:openwrt_rb750gr3 [2021/02/10 08:41] – [Flash the permanent version of OpenWRT] admin | user_guide:mikrotik:openwrt_rb750gr3 [2022/04/26 09:26] (current) – [Introduction] admin | ||
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| * Some of their models are also able to run OpenWRT as an alternative to RouterOS. | * Some of their models are also able to run OpenWRT as an alternative to RouterOS. | ||
| * OpenWRT is OpenSource and there is no paid for licensing involved on OpenWRT. | * OpenWRT is OpenSource and there is no paid for licensing involved on OpenWRT. | ||
| - | * This page will just cover the flash from RouterOS to OpenWRT on the Mikrotik RB750Gr3. | + | * This page will **only** |
| * We will cover the configuration of the device once OpenWRT is running on it on a separate page. | * We will cover the configuration of the device once OpenWRT is running on it on a separate page. | ||
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| Now that we have the license key taken care of we can go to the next step which is to load the RAM based OpenWRT onto the device | Now that we have the license key taken care of we can go to the next step which is to load the RAM based OpenWRT onto the device | ||
| - | ==== Load a RAM based version of OpenWRT ==== | + | ===== Load a RAM based version of OpenWRT |
| * In order for us to get the RAM based version of OpenWRT onto the Mikrotik two things are involved. | * In order for us to get the RAM based version of OpenWRT onto the Mikrotik two things are involved. | ||
| - There has to be a BOOTP environment set up to serve the RAM based image | - There has to be a BOOTP environment set up to serve the RAM based image | ||
| - The Mikrotik has to be set in such a mode as to use the BOOTP environment to fetch the RAM based image using BOOTP | - The Mikrotik has to be set in such a mode as to use the BOOTP environment to fetch the RAM based image using BOOTP | ||
| - | === Set up a BOOTP Environment === | + | ==== Set up a BOOTP Environment |
| * On Ubuntu it is very simple and we just create a small shell script to take care of it | * On Ubuntu it is very simple and we just create a small shell script to take care of it | ||
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| <file bash loader.sh> | <file bash loader.sh> | ||
| #!/bin/bash | #!/bin/bash | ||
| + | #HEADS UP substitute with the logged in user's name that you use to create this file e.g. whoami output | ||
| USER=system | USER=system | ||
| #HEADS UP THIS MUST MATCH YOUR MACHINE' | #HEADS UP THIS MUST MATCH YOUR MACHINE' | ||
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| === Force Mikrotik to use BOOTP === | === Force Mikrotik to use BOOTP === | ||
| + | == We add a note on setting the Mikrotik up to do BOOTP == | ||
| + | * Not all Mikrotiks we worked with had BOOTP enabled after a reset. | ||
| + | * For those there is a manual procedure you have to follow to enable this startup functionality. | ||
| + | * https:// | ||
| + | * https:// | ||
| + | |||
| + | == Kicking off BOOTP == | ||
| * To force the Mikrotik to use the BOOTP environment you need to connect the Internet Port of the Mikrotik to your Linux machine. (Internet Port is Port 1 on the Mikrotik) | * To force the Mikrotik to use the BOOTP environment you need to connect the Internet Port of the Mikrotik to your Linux machine. (Internet Port is Port 1 on the Mikrotik) | ||
| * Press the RESET button while powering up the board. | * Press the RESET button while powering up the board. | ||
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| * We are all set now to flash the final version of OpenWRT onto the device. | * We are all set now to flash the final version of OpenWRT onto the device. | ||
| * At this stage you can still return the device back to the original RouterOS by simply rebooting it since the OpenWRT running is all in RAM. | * At this stage you can still return the device back to the original RouterOS by simply rebooting it since the OpenWRT running is all in RAM. | ||
| - | * We are however not going to to that since we want to move over to OpenWRT permanently :-) | + | * We are however not going to do that since we want to move over to OpenWRT permanently :-) |
| - | ==== Flash the permanent version of OpenWRT ==== | + | ===== Flash the permanent version of OpenWRT |
| * Download the **sysupgrade** version of the firmware. | * Download the **sysupgrade** version of the firmware. | ||
| * Ours is called **openwrt-19.07.6-ramips-mt7621-mikrotik_rb750gr3-squashfs-sysupgrade.bin** at the time of this writing. | * Ours is called **openwrt-19.07.6-ramips-mt7621-mikrotik_rb750gr3-squashfs-sysupgrade.bin** at the time of this writing. | ||