Config Optimizer: MTU checks and more #273
Description
Summary
Add MTU configuration checks to Config Optimizer. Idea from TekWarren on Reddit. I'm adding other Config Optimizer checks to implement here as I think of them.
Checks to implement
- Bridge and interface MTU consistency - When Jumbo Frames are enabled, verify bridge and interface MTUs match. Earlier UniFi Network firmware on UCG-Fiber had a known bug where these could get out of sync which caused massive LAN->WAN and inter-VLAN performance bottlenecks. This requires SSH access to the gateway, see https://www.reddit.com/r/Ubiquiti/comments/1pfgy00/fix_ucgfiber_asymmetric_download_speeds_and_slow/
- WAN interface MTU - Check WAN MTU settings, especially useful for cellular (5G/LTE) connections where non-default MTU can make a big difference.
- QoS suggestion for GRE 5G/LTE backup connections - Suggest that for people with limited data plans on their 5G/LTE backup connections set up Objects in UniFi Network to limit streaming and other apps bandwidth per session.
- Jumbo Frames - for networks with multiple 10 GbE or 5 GbE access ports, suggest enabling Jumbo Frames in Global Switch Settings.
- Jumbo Frames Consistency - ensure if enabled at the global switch level or on any individual switches, that it's enabled on all switches.
- Hardware Acceleration - if disabled on UniFi gateway devices, suggest enabling for peak WAN and Inter-VLAN performance.
- Flow Control - for networks with pretty fast WAN connections and slower user client device links (so not IoT devices, and Wi-Fi and wired), suggest enabling Flow Control for better internet speeds to those devices.
Notes
- Fits naturally under Config Optimizer as a quick config check
- Need to research optimal MTU values for common WAN types (PPPoE, cellular, etc.)
- Create an article(s) to explain how to set up more advanced Policies and Objects in UniFi Network