I’m connecting from one MacBook Pro (10.6.5) (let’s call it “1”) to another (10.4.11) “2” via WLAN and afp and both are connected to the WLAN via WPA2.
The router is showing me theoretical connection speeds of 104 MBit/s for “1” and 54 MBit/s for “2”. However, when I’m trying to transfer files (doesn’t matter whether I use drag & drop in Finder or cp in the terminal), it takes eternities: 70 seconds for a 2.1 MB file (~ 250 KBit/s if I didn’t make a mistake). The network activity monitor looks like this during the transfer:
(There’s no other significant network activity going on.)
Clearly, this is off by several orders of magnitude. Does somebody have a clue what could cause this?
Other network traffic works normal on both MacBooks. As far as I know, I have made no special configurations.
Best Answer
You should try the transfer in FTP only because FTP sets it's own "MTU". If this sends files very quickly, you are looking at a TCP fragmentation issue, i.e., you are sending TCP packets too large for the router to handle on it's own. I imagine you can tweak the Mac network settings to force fragmentation to 1500 or less per packet.