Point-To-Point Topology; Fabric Topology; Arbitrated Loop Topology - LSI LSIFC929 Technical Manual

2.6.1 Point-to-Point Topology

2.6.2 Fabric Topology

2.6.3 Arbitrated Loop Topology

2-8
The topology shown in
N_Ports occurs without the use of Fabric, is defined as point-to-point.
Figure 2.7 Point-to-Point Topology
N_Port A
Figure 2.8 illustrates multiple N_Ports interconnected by a Fabric. This
topology uses the Destination_Identifier (D_ID) embedded in the Frame
Header to route the Frame through a Fabric to the desired Destination
N_Port.
Figure 2.8 Fabric Topology
N_Port
F_Port
N_Port F_Port
The Arbitrated Loop topology permits 2 to 127 L_Ports to communicate
without the use of a Fabric, as in Fabric topology. The arbitrated loop
supports a maximum of one point-to-point circuit at a time. When two
L_Ports are communicating, the arbitrated loop topology supports
simultaneous, symmetrical bidirectional flow.
Figure 2.9 illustrates two independent arbitrated loop configurations,
each with multiple L_Ports attached. Each line in the figure between
L_Ports represents a single fibre. The lower configuration shows an
Arbitrated Loop composed of three NL_Ports and one FL_Port (a Public
Loop).
Fibre Channel Overview
Copyright © 2000, 2001 by LSI Logic Corporation. All rights reserved.
Figure 2.7, in which communication between
N_Port B
Fabric
F_Port
F_Port
N_Port
N_Port