https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231716

            Bug ID: 231716
           Summary: scp stalls on (slightly) big files over wifi
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: wireless
          Assignee: wirel...@freebsd.org
          Reporter: jor...@gmail.com

Created attachment 197487
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=197487&action=edit
Output of scp -v on FreeBSD and GNU/Linux

When I use scp to copy a big (100Mb) file from, or to, the laptop running
FreeBSD, it allways stalls, usually at 24Mb, sometimes a bit more, but never at
100Mb

This only occurs over wifi. When using wired network, everything is fine.

I have allso tried the same with GNU/Linux installed on the laptop and
everything works fine.

When the scp stalls, I am still able to, for instance, browse the web or using
an other ssh session, so it is not the network going down.

The laptop is a Lenovo W500 with Intel wifi: 
iwn0@pci0:3:0:0:        class=0x028000 card=0x10118086 chip=0x42368086 rev=0x00
hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Ultimate N WiFi Link 5300'
    class      = network
    cap 01[c8] = powerspec 3  supports D0 D3  current D0
    cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
    cap 10[e0] = PCI-Express 1 endpoint max data 128(128) FLR RO NS
                 link x1(x1) speed 2.5(2.5) ASPM L0s/L1(L0s/L1)
    ecap 0001[100] = AER 1 0 fatal 0 non-fatal 1 corrected
    ecap 0003[140] = Serial 1 0016eaffffc17714

Attached output from FreeBSD and GNU/Linux (100Mb is a remote file on a Linux
server)

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