EXFO ETS-1000G - Manual (Page 35)

Preparing RFC 2544 for Analysis
10 Gigabit Ethernet Analyzer 25
Topology
Topology
Remote IP Remote device IP address (see Asymmetric Test on page 45)
Direction Testing direction:

both — select if you want to perform measurement of both
direction (from local device to remote and from remote
device to local);

upstream — select if you want to perform asymmetric test
in the direction from local device to remote (see
Asymmetric Test on page 45);

downstream — select if you want to perform asymmetric
test in the direction from remote device to local (see
Asymmetric Test on page 45).