# Slow Upload Speed
The `slow upload speed` when ODI DFP-34X-2C2 in 2.5Gb mode, this is known issue in some ISP where ISP using another Realtek ONU beside RTL960x

## Mikrotik GPON Flooding Mitigation
Many Mikrotik devices, like the RB5009, can flood GPON with 2.5Gb links, exceeding GPON's 1.25Gb upload capacity. This can result in packet flooding and late discards. To mitigate this issue, consider applying the tweak mentioned by [
Luckygecko1 @ Reddit](https://www.reddit.com/r/mikrotik/comments/14ky6s1/rb5009_poor_25g_ethernet_performance/jq0gjer/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button)

![image](https://github.com/Anime4000/RTL960x/assets/1908715/c5cedc9f-a80b-4fa4-a22a-44f79fd01554)


## Realtek ONU
ISP bought cheap ONU or ONR (Optical Network Router) and it using Realtek SoC where share similar to RTL960x, for example `D-Link DPN-FX3060V`

[![EuA0cO.md.jpg](https://pictr.com/images/2023/06/24/EuA0cO.md.jpg)](https://pictr.com/image/EuA0cO)
[![EuAPnr.md.jpg](https://pictr.com/images/2023/06/24/EuAPnr.md.jpg)](https://pictr.com/image/EuAPnr)

## Wrong OMCI
OLT send wrong OMCI value to ODI DFP-34X-2C2 which D-Link DPN-FX3060V is understand:

### D-Link DPN-FX3060V
```
bandwidth get egress port all
port: 0  rate:1024000

bandwidth get ingress port all
port: 0 rate:32767999
port: 1 rate:32767999
port: 2 rate:32767999
port: 3 rate:32767999
port: 4 rate:32767999
port: 5 rate:32767999
port: 6 rate:32767999
port: 7 rate:32767999
```

### ODI DFP-34X-2C2
```
bandwidth get egress port all
port: 0  rate:1048568
         queue: 0  apr-index: 0
         queue: 1  apr-index: 0
         queue: 2  apr-index: 0
         queue: 3  apr-index: 0
         queue: 4  apr-index: 0
         queue: 5  apr-index: 0
         queue: 6  apr-index: 0
         queue: 7  apr-index: 0
port: 2  rate:4194296
         queue: 0  apr-index: 0
         queue: 1  apr-index: 0
         queue: 2  apr-index: 0
         queue: 3  apr-index: 0
         queue: 4  apr-index: 0
         queue: 5  apr-index: 0
         queue: 6  apr-index: 0
         queue: 7  apr-index: 0

bandwidth get ingress port all
port: 0 rate:1048568
port: 2 rate:4194296
```

# Fixes
You may try these

## `OMCI_TM_OPT`
```
flash set OMCI_TM_OPT 0
reboot
```
0. Priority controlled
1. Rate controlled
2. Priority and rate controlled

## `diag`
```
/bin/diag bandwidth set egress port all rate 4194296
/bin/diag bandwidth set ingress port all rate 4194296
```
* these will not survive across reboot!

If these wont fix the issue, you can't use ODI DFP-34X-2C2, unless ODI fix the firmware.