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diff --git a/_gpon/gpon-auth.md b/_gpon/gpon-auth.md new file mode 100644 index 0000000..e4ec6ba --- /dev/null +++ b/_gpon/gpon-auth.md @@ -0,0 +1,47 @@ +--- +title: GPON Auth +has_children: false +nav_order: 3 +description: ONU Online Status +layout: default +--- + + +# GPON Status: Ox +The process for an ONU to go online unconfigured involves five states: + +- **`O1` Initial:** the OLT sends a message to the ONU to start the ONU, and the ONU enters the standby state; +- **`O2` Standby:** After receiving the message, the ONU extracts the delimiter value, power level, and pre-allocated compensation delay from the message, and adjusts its configurations accordingly to support subsequent information exchange. +- **`O3` Serial number:** The OLT sends a serial number (SN) request to the ONU. The ONU sends its SN to the OLT. After receiving the SN of the ONU, the OLT allocates a temporary ONU ID to the ONU. +- **`O4` Ranging:** The OLT sends a ranging request to the ONU. After receiving the ranging request from the OLT, the ONU responds with a message carrying its SN and ONU ID. The OLT calculates the compensation delay and sends it to the ONU in a message. After receiving the message, the ONU sets the compensation delay accordingly. +- **`O5` Operation:** The OLT sends a password request to the ONU. The ONU returns a password to the OLT. +- **`O6` Intermittent LODS state.** +- **`O7` Emergency Stop state.** + +The password is not configured on the OLT. If the automatic discovery function is enabled on the PON port of the OLT, the OLT reports an ONU auto-discovery alarm to the CLI or NMS. The ONU goes online normally only after being confirmed. + +```mermaid +graph TD + O1[O1 Initial state] -->|Downstream Synchronization attained| O2[O2-03 Standby-Serial number] + O2 -->|Assign ONU-ID Ploam and Equalization delay assigned| O4[O4 Ranging State] + O4 -->|Ranging Time PLOAM and Equalization delay assigned| O5[O5 Operation] + O5 & O4 & O2 -->|Loss of downstream syncronizzation| O6[O6 Intermittent LODS state] + O2 ---->|Disable S/N Request| O7[O7 Emergency stop state] + O2 -->|Broadcast deactivate ONU-ID Request| O1 + O4 --->|TO1 time expires| O2 + O4 & O5 ---->|Disable S/N Request| O7 + O7 ---->|Enable S/N Request| O1 + O6 ---->|TO2 timer expires| O1 + O6 -->|Downstream Synchronization restored| O5 + O5 & O4 ---->|Deactive ONU-ID Request| O1 +``` + +# Fake O5 Status + +This known issue with Alcatel/Nokia OLT giving fake `O5` ONU Status, OLT will hold OMCI Provisioning until correct OMCI Information + +It happens when the OLT detects that the ONT is `drunk`. And try to update the firmware before opening the GEM link. One must try to change the software version or other data. + +- [The Process for an ONU to go Online](https://forum.huawei.com/enterprise/en/the-process-for-an-onu-to-go-online-gpon-technical-posts-12/thread/462895-100181) +- [What’s the Authentication of GPON](http://zhangjorna.blogspot.com/2016/05/whats-authentication-of-gpon.html) +- [`O5` No Internet](https://github.com/Anime4000/RTL960x/blob/main/Docs/fakeO5.md)
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