Brother MFC-L2710DW only shows up as WSD, not eSCL

[timakro]

According to the README, eSCL is supported for Brother MFC-L2710DW. If both are supported I figured sane-airscan might pick WSD automatically, so I also tried setting protocol = manual. Still it only shows WSD, not eSCL.

$ airscan-discover 
[devices]
  Brother MFC-L2710DW series = http://192.168.0.102:80/WebServices/ScannerService, WSD
  Brother MFC-L2710DW series = http://[FE80::BEF4:D4FF:FEF1:A9A2%252]:80/WebServices/ScannerService, WSD

$ scanimage -L
device `airscan:w0:Brother MFC-L2710DW series' is a WSD Brother MFC-L2710DW series ip=192.168.0.102

My motivation for trying eSCL is that I'm hoping a higher DPI would be supported.