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| user_guide:mikrotik:openwrt_rb750gr3 [2021/02/10 08:40] – [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. | ||
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| </ | </ | ||
| * Congratulations you have now successfully migrated from RouterOS to OpenWRT | * Congratulations you have now successfully migrated from RouterOS to OpenWRT | ||
| - | * If it might happen so that in future you mess up the current version of OpenWRT so bad that it will not let you in, you can just repeat the BOOTP RAM image and repeat | + | * If it might happen so that in future you mess up the current version of OpenWRT so bad that it will not let you in, you can just repeat the BOOTP RAM image boot and repeat |
| + | * This makes the RouterBoard pretty robust | ||