HP procurve series 4100gl Management And Configuration Manual page 192

Optimizing Traffic Flow with Port Controls, Port Trunking, and Port-Based Priority
Port Trunking
9-20
Listing Static LACP and Dynamic LACP Trunk Data. This command
lists data for only the LACP-configured ports.
Syntax: show lacp
In the following example, ports A1 and A2 have been previously configured
for a static LACP trunk. (For more on "Active", see table 11-9-6 on page 9-27.)
Figure 9-10. Example of a Show LACP Listing
Dynamic LACP Standby Links. Dynamic LACP trunking enables you to
configure standby links for a trunk by including more than four ports in a
dynamic LACP trunk configuration. When four ports (trunk links) are up, the
remaining link(s) will be held in standby status. If a trunked link that is "Up"
fails, it will be replaced by a standby link, which maintains your intended
bandwidth for the trunk. (See also the "Standby" entry under "Port Status" in
table 9-9-6, "LACP Port Status Data", on page 9-27.) In the next example, ports
A1 through A5 have been configured for the same LACP trunk. Notice that one
of the links shows Standby status, while the remaining four links are "Up".