HP Surestore 6164 Switch - Manual (Page 28)

28 HP Distributed Fabrics User’s Guide
There are three possible levels for a port:
• Level 0 Reconfigures the port as a regular switch port. The number of
buffers reserved for the port supports up to 10 km links.
• Level 1 Distances up to 50 km. A total of 27 full-size frame buffers are
reserved for the port.
• Level 2 Distances up to 100 km. A total of 60 full-size frame buffers are
reserved for the port.
Ports are grouped into quads, each of which consists of four adjacent ports
that share a common pool of frame buffers. The possible quad groupings
are ports 0 to 3, 4 to 7, 8 to11, and 12 to15. Certain buffers are dedicated for
each port, but others are shared among the ports. In extended fabric mode,
one port is given an increase of dedicated buffers from this pool. Because
the total number of frame buffers in a quad is limited, only one port in the
quad can be configured for use in an extended fabric at any one time. When
one port is configured as a long-distance port, the remaining ports in the
quad must be configured as regular switch ports (Level 0).
Accessing Through the Telnet Interface
You can configure a port to support long-distance links by using the
following
portCfgLongDistance Telnet command.
Synopsis portCfgLongDistance port_number
Availability Administrator. The Extended Fabrics license key is required to see this
command.
Description Use this command to specify the allocation of enough full size frame
buffers on a particular port to support a long-distance link of up to 100 km.
You can use the port as either an Fx_Port or an E_Port. The configuration is
saved in the non volatile memory and is persistent across switch reboot or
power cycle.