├── .gitattributes
├── 10-monitor-mtu.sh
├── 11-change-mtu.sh
└── README.md


/.gitattributes:
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1 | # Auto detect text files and perform LF normalization
2 | * text=auto
3 | 


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/10-monitor-mtu.sh:
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1 | #!/bin/sh
2 | 
3 | /mnt/data/11-change-mtu.sh &


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/11-change-mtu.sh:
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 1 | #!/bin/sh
 2 | function check_mtu {
 3 |     ip link list | grep -E 'br.:|br..:' | grep 'mtu 9216' > /dev/null;
 4 | }
 5 | while true; do
 6 |   if check_mtu; then
 7 |     echo "MTU is configured" > /dev/null
 8 |   else
 9 |     echo "Reconfiguring MTU" > /dev/null
10 |     interfaces=$(ip link list | grep -i switch | sed 's/^[^:]*://g; s/:.*//; s/@switch0.*//')
11 |     sfp=$(ip link list | grep -i eth10 | sed 's/^[^:]*://g; s/:.*//; s/@eth10.*//')
12 |     for interface in $interfaces
13 |     do
14 |       ip link set dev $interface mtu 9216
15 |     done
16 |     for sfp in $sfp
17 |     do
18 |       ip link set dev $sfp mtu 9216
19 |     done
20 |   fi
21 |   sleep 5
22 | done
23 | 


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/README.md:
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 1 | # UDMP Monitor MTU
 2 | 
 3 | # Ubiquiti has added this as a part of the 1.12.13 EA firmware. This repository is now archived
 4 | 
 5 | UDMP Monitor MTU is a shell script that checks all VLAN interfaces and LAN SFP+ ports on the UDM Pro and sets them to 9216. This allows for intervlan routing to take place without being fragmented. This runs every 5 seconds but can be modified if you change the sleep values in the script.
 6 | 
 7 | ## Pre-Requisites
 8 | UDMP has to have the Boot script installed from this repo https://github.com/boostchicken/udm-utilities/tree/master/on-boot-script
 9 | 
10 | 
11 | ## Installation
12 | 
13 | 1. Place the 10-monitor-mtu.sh in /mnt/data/on_boot.d/ folder and mark it as executable
14 | 2. Place the 11-change-mtu.sh in the /mnt/data folder and mark it as exectable
15 | 
16 | ```bash
17 | chmod +x /mnt/data/on_boot.d/10-monitor-mtu.sh
18 | chmod +x /mnt/data/11-change-mtu.sh
19 | ```
20 | 
21 | ## Contributing
22 | Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
23 | 
24 | Please make sure to update tests as appropriate.
25 | 
26 | ## License
27 | [MIT](https://choosealicense.com/licenses/mit/)
28 | 


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