Hmm..
I think, yet again, this NIC is very limited in features. And does not support jumbo frames
root@pandora:/etc/network# hwinfo --netcard
07: None 00.0: 0200 Ethernet controller
[Created at pci.1017]
Unique ID: S7lj.TfPFe67fIBB
SysFS ID: /devices/platform/1e100000.ethernet
SysFS BusID: 1e100000.ethernet
Hardware Class: network
Model: "ARM Ethernet controller"
Device: "ARM Ethernet controller"
Driver: "mtk_soc_eth"
Device File: eth0
HW Address: 5e:73:b5:84:62:8b
Link detected: yes
Module Alias: "of:NethernetT(null)Cmediatek,mt7621-eth"
Config Status: cfg=new, avail=yes, need=no, active=unknown
09: None 00.0: 0200 Ethernet controller
[Created at pci.2177]
Unique ID: ue9r.zpNUCgvBch2
SysFS ID: /devices/platform/1e100000.ethernet/mdio_bus/mdio-bus/mdio-bus:00
SysFS BusID: mdio-bus:00
Hardware Class: network
Model: "Ethernet controller"
Device: "Ethernet controller"
Driver: "mt7530"
Device File: ethblue
HW Address: 90:50:5a:55:3a:51
Link detected: yes
Config Status: cfg=new, avail=yes, need=no, active=unknown
10: None 00.0: 0200 Ethernet controller
[Created at pci.2177]
Unique ID: ue9r.zpNUCgvBch2
SysFS ID: /devices/platform/1e100000.ethernet/mdio_bus/mdio-bus/mdio-bus:00
SysFS BusID: mdio-bus:00
Hardware Class: network
Model: "Ethernet controller"
Device: "Ethernet controller"
Driver: "mt7530"
Device File: ethblack
HW Address: 90:50:5a:55:3a:50
Link detected: yes
Config Status: cfg=new, avail=yes, need=no, active=unknown