Bandwidth test TCP packet size

RE: Bandwidth test TCP packet size

Why was this capability removed from the bandwidth test? Sizes are greyed out if TCP is chosen … that’s not good.

Sam

possibly because tcp packet size hasn’t worked for a long time.
It was supposed to set tcp mss size but since dynamic path mtu support was enabled it did nothing.

Just a guess.

You can not set size of TCP packet. Out going packet size will be maximum packet size that is set on the interface.

TCP will always send maximum possible packet size (except the last packet :slight_smile: ) - you can take a look at RFC

I do not fully agree with you.
TCP MSS is maximum TCP data segment size.
TCP data segments may be between 0 and MSS in size.
If you set PSH (PUSH) flag on the socket your stack wont coalesce data but will instead send any small amount that you feed it, right away.

Ever used SSH? Noticed how a heavily encrypted session can seem more responsive than an unencrypted telnet session, even though it demands a hundred times more processing time?

Sten - i know, but thanks for correction!

Sorry :slight_smile:
Hopefully it can be helpful to others…?