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2.5 FC Ports
2.6 FC Topologies
Figure 2.6
Write Event Trellis
Initiator
CMD SEQ
Data SEQ Frame 1
Data SEQ Frame 2
Data SEQ Frame N
FC devices are called nodes. Each node has at least one port to provide
access to other ports in other nodes. The "port" is the hardware entity
within a node that performs data communications over the FC Link.
A variety of types of ports are defined within the FC standard, based on
the location of the port and the topology associated with it. The most
commonly used ports are N_Ports, NL_Ports, F_Ports, and FL_Ports.
These types of ports appear in
Topologies are defined, based on the capability and the presence or
absence of Fabric between the N_Ports:
•
Point-to-Point topology
•
Fabric topology
•
Arbitrated Loop topology
FC-PH protocols are topology independent. Attributes of a Fabric may
restrict operation to certain communication models.
FC Ports
Copyright © 2000, 2001 by LSI Logic Corporation. All rights reserved.
Target
Fabric
Data Req SEQ
RSP SEQ
Figure
2.7,
Figure 2.8,
and
Figure
2.9.
2-7
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