HP J3137A Installation And Reference Manual page 13

Connecting Additional Hubs ("Cascading")
To add additional 100VG network ports, HP AdvanceStack 100VG hubs can
be "cascaded" together. To cascade HP 100VG hubs, connect a LAN down-
link port (ports 1 through 6) on the upper-level hub to the "Uplink" port on
the lower-level hub.
For a twisted-pair connection, use a standard four-pair unbundled
LAN port cable.
You can use any or all 100VG LAN downlink ports on the upper-level
hub to cascade to an uplink port on a 100VG lower-level hub. Down-
link ports on the Hub-7E are numbered 1 through 6.
Try to minimize the number of levels of cascaded hubs. We
recommend that you use no more than three levels of cascading (see
the 100VG AnyLAN Technology Guide for more information on
topology rules).
For more information on cable lengths, see the HP 100VG AnyLAN
Technology Guide.
In the following illustration, two hubs are connected together to add more
users to the existing 100VG network. This illustration also shows that an
example of two level cascading.
Upper-Level Hub
Unbundled 4-Pair LAN Cable
Maximum: 100 meters for Category 3
Lower-Level Hub
Uplink Port
4. Complete Network Connections to the Hub
Standard LAN Port ("Downlink")
Level 1
Level 2
7