3Com 3C17205-US - Corp SUPERSTACK 3 SWITCH 4400 24PORT Implementation Manual page 38

38 C 2: O B
HAPTER PTIMIZING ANDWIDTH
3 Connect port 2 on the upper Switch to port 2 on the lower Switch.
4 Connect port 4 on the upper Switch to port 4 on the lower Switch.
5 Connect port 6 on the upper Switch to port 6 on the lower Switch.
6 Connect port 8 on the upper Switch to port 8 on the lower Switch.