- Set-up static ip adress 192.168.1.2 and gateway 192.168.1.1 (see below)
- Connect on eth port 0
- Access https://192.168.1.1 (ubiquiti web interface)
Note: default user
ubnt, default password
Through ssh, see below for the user/password
Installing OpenWrt on these devices requires two steps: first to install a minimal “factory” image (filename includes initramfs-factory), then from that using the standard OpenWrt “sysupgrade” facility to install a full-fledged OpenWrt image (filename includes squashfs-sysupgrade).
- flash the .tar and reboot:
add system image /tmp/openwrt-ramips-mt7621-ubnt-erx-initramfs-factory.tar
- change ethernet port from eth0 to eth1, now user is root and no ubnt
sysupgrade -n /tmp/openwrt-19.07.8-ramips-mt7621-ubnt-erx-squashfs-sysupgrade.binnote, weirdly I had to reset (~10 second pushing) the openwrt to be able to run the sysupgrade command.
Note: To upgrade to the latest 21.02, I used the forcing upgrade
sysupgrade -v -F -n /tmp/openwrt-21.02.0-ramips-mt7621-ubnt_edgerouter-x-squashfs-sysupgrade.bin from an OpenWRT installation, else it would not go because it was uncapable to migrate the configuration. Careful if you already have some configurtion it will be lost ! Then I had to run in failsafe (push reset button approx 5 seconds and release, then access it in ssh and run
first_boot, then reboot).
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 bdbc39358555d861f9442f54c10e0b026314247b6faa8176d79e037c72112b80 openwrt-19.07.8-ramips-mt7621-ubnt-erx-squashfs-sysupgrade.bin 7c530d990b83d045edbbe77c9447976f7d7bdadcfde70ba96ebc25f814c4c521 openwrt-21.02.0-ramips-mt7621-ubnt_edgerouter-x-squashfs-sysupgrade.bin 1862167e0edddd198d3c811762774272474f82474996c32b72f4c70fb945f0dd openwrt-ramips-mt7621-ubnt-erx-initramfs-factory.tar -----BEGIN PGP SIGNATURE----- iHUEAREIAB0WIQTvklEfN1MKqSoQFZ9IVFdXiuZ0RgUCYT5kjwAKCRBIVFdXiuZ0 RnIOAQDF4wtg2m7FPmT/fe2Dnxn3Pn924gy9T+Vf34CEBtV/ywD7BJrTNtA0Byre p76eKA+enva1UUJNDCtxSGbpE4g75iE= =Vzx2 -----END PGP SIGNATURE-----
It happened once... no way to boot on failsafe.
- you reset 30 seconds
- with tftp, you flash to
tftp> connect 192.168.1.20 tftp> binary tftp> put ER-e50.recovery.v22.214.171.12408541.190708.0508.16de5fdde.img.signed
- wait a little bit (3 to 5 minutes), to my case I had eth 0 led on for a while
- then follow "Install OpenWRT" part, you will have to go through 19.07 version FIRST then 21.02 (21.02 does not work first)