MTU setting on merlin - does Cake alter this?

[anotherengineer]

Good day,

My router says mtu is 1500, however speed guide analyser says otherwise (below), does/can cake affect the MTU?

« SpeedGuide.net TCP Analyzer Results »
Client OS/browser: Windows 10 (Firefox 146.0)
MSS: 1364
MTU: 1404
TCP Window: 263168 (not multiple of MSS)
RWIN Scaling: 8 bits (2^8=256)
Unscaled RWIN : 1028
Recommended RWINs: 65472, 130944, 261888, 523776, 1047552
BDP limit (200ms): 1053 Mbps (105 Megabytes/s)
BDP limit (500ms): 421 Mbps (42 Megabytes/s)
MTU Discovery: ON
TTL: 43
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

 

[ColinTaylor]

Temporarily turn off QoS, run the test again and compare the results.