HP 2000fc Reference Manual page 43

If host port interconnects are enabled, the paired ports are connected in a loop and
must be set to use loop topology. Changing the topology setting for one host port
automatically changes the setting for the paired port on the partner controller.
If host port interconnects are disabled, you can change the topology setting for each
host port individually.
Note – In a switch-attach configuration, if you change from loop to point-to-point
after already establishing a public loop connection, the switch might ignore
subsequent attempts to perform point-to-point initialization.
To set host port topology:
1. Select Manage > General Config > Host Port Configuration.
2. In the Advanced Options panel, click Change Host Port Topology.
3. For each port that is connected to a host, set the appropriate topology.
The default is Loop (Fibre Channel Arbitrated Loop).
4. Click Save And Continue.
The main Host Port Configuration page is displayed.
Note – For a system using loop topology, you might need to reset a host link to fix
a host connection or configuration problem. See "Resetting a Host Channel on an
FC or SAS System" on page 185 for steps to reset a host link.
Chapter 2 Configuring Your System for the First Time 43