Is there any recommended way to use jumbo frames over wired LAN between hap ax3 and ax2?
I have them connected with VLAN trunk port over GE, with CAPsman (ax3) controlled own cap and another ax2 AP. As recommended, all of hap’s have one bridge only, with WIFI interfaces connected with different SSID/VLAN each. Set GE L2MTU to maximum doesn’t work as far as WIFI connected bridge drop Actual MTU back to 1500.
Old pair of hap ac easily realize this scenario with pair of bridges each, LAN dedicated bridge with maximum L2MTU and another Wireless dedicated with standard L2MTU.
The wifiwave2 driver does not support MTU over 1500 bytes, that is why it keeps dropping back.
With only ethernet it would probably work fine.
(WiFi does not support jumbo frames)
Not saying you’re wrong but 7.12beta chain has mention of ability to change MTU and L2MTU on wifiwave2.
Help pages also indicate MTU should be able to go up to 2290 ?
I don’t look for Jumbo frames over WiFi, i’m looking Jumbo frames over wired LAN. The issue is, when bridge is connected to WiFi interface, all bridge interfaces drop Actual MTU to 1500, WiFi, LAN, all of them, it’s how the bridges works.
Indeed. So when you want WiFi to work and also jumbo frames on ethernet you will have to set it up so the WiFi is not part of (the same) bridge. That will add an extra routing hop for your WiFi and the MTU can be different.
Ok, both hap’s should have two bridges, what is most effective way to connect “wireless bridge” to “wired bridge with jumbo frames”? I suppose extra routing hop will appear if bridges are connected on L3, may we connect it on L2 with keeping every bridge own MTU?
No, you can not. MTU is integral property of a L3 network … which most of times overlaps with L2 broadcast domain (or L2.5 if one uses some advanced L2 tech, such as VLAN). Fragmentation is performed by L3 entity (IP stack of e.g. a router), PMTUD as well. Since bridge is L2 entity, it’s clear that it can not bridge parts of L2 network with differrnt MTUs. So if you insist on jumbo frames on wired part of network, you’ll have to route between it and wireless part. IMO use of jumbo frames in network of modern devices is, in most cases, overrated.