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| -rw-r--r-- | _ont/ont-fs-com-gpon-onu-stick-with-mac.md | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/_ont/ont-fs-com-gpon-onu-stick-with-mac.md b/_ont/ont-fs-com-gpon-onu-stick-with-mac.md index c7a1c5d..2c7a116 100644 --- a/_ont/ont-fs-com-gpon-onu-stick-with-mac.md +++ b/_ont/ont-fs-com-gpon-onu-stick-with-mac.md @@ -266,6 +266,45 @@ reboot onu ploamsg ``` +## Disable RX_LOS status +{% include alert.html content="The patch below is only compatible with the firmware version `6BA1896SPLQA42`" alert="Info" icon="svg-info" color="blue" %} + +Some switches/routers (e.g. Mikrotik) do not allow access to the magament interface without the fiber connected because the SFP reports RX_LOS status, it's possible to modify the `mod_optic.ko` driver to spoof non RX_LOS status by setting PIN 8 (RX_LOS) to be always low. + +This is the change to be made in hex format: + +``` +< 00013740: 2404 0003 2405 0001 0c00 0000 ac43 0980 $...$........C.. +--- +> 00013740: 2404 0003 2405 0000 0c00 0000 ac43 0980 $...$........C.. +``` + +{% include alert.html content="Proceed only if your `md5sum /lib/modules/3.10.49/mod_optic.ko` has the correct checksum `7c718c3410c4120fe98fa7a9a5c6c407`" alert="Info" icon="svg-info" color="blue" %} + +This is the patch, encoded in base64: +``` +QlNESUZGNDA2AAAAAAAAADYAAAAAAAAAXEEFAAAAAABCWmg5MUFZJlNZ5TTrjgAAB+ZARjAEACAA +AARAACAAMQZMQRppiFkgKGTeXi7kinChIcpp1xxCWmg5MUFZJlNZcaVLvQABOOCAwAAAAQAIAAig +ACClRgZoMhUf9JKbgIk3hdyRThQkHGlS70BCWmg5F3JFOFCQAAAAAA== +``` + +Save it on your computer (not on the stick) as `mod_optic.base64`, then run: +```sh +base64 -d mod_optic.base64 > mod_optic.bspatch +bspatch <your_original_mod_optic.ko> mod_optic.ko mod_optic.bspatch +``` +{% include alert.html content="if you don't have bspatch installed, most distributions includes it in bsdiff package" alert="Info" icon="svg-info" color="blue" %} + +After patching the resulting patched `mod_optic.ko` should have an md5 checksum of `e14a5a70b023873853afe920870f076e`. +If that also checks, go on making a backup copy of your original `mod_optic.ko` on the stick. + +```sh +cd /lib/modules/3.10.49/ +cp mod_optic.ko mod_optic.ko.original +``` + +Now you have to use SCP to copy the modified `mod_optic.ko` kernel module in `/lib/modules/3.10.49/mod_optic.ko`. + ## List of software versions - 6BA1896SPLQA13 (Dec 16 2016) - 6BA1896SPLQA41 |