IBM Flex System V7000 Expansion Enclosure 4939H29 User Manual
Product codes
4939H29
Chapter 11. SAN Connections and Configuration
459
Draft Document for Review January 29, 2013 12:52 pm
8068ch11-SAN Config.fm
Figure 11-19 FC point to point topology within the IBM Flex System Enterprise Chassis
11.5.2 FC addressing and port types
In a Fibre Channel environment the unique identity of participants are maintained through a
hierarchy of fixed names and assigned addresses identifiers. In Fibre Channel terminology, a
communicating device is a node. Each node has a fixed 64-bit Node_name assigned by the
manufacturer. The node name will be unique if the manufacturer has registered a range of
addresses with the IEEE, and so is normally referred to as a World-Wide Name. An N_Port
within a parent (WWN) node is also assigned a unique 64-bit Port_Name, which aids the
accessibility of the port and is known as the Port World-Wide Name (PWWN).
hierarchy of fixed names and assigned addresses identifiers. In Fibre Channel terminology, a
communicating device is a node. Each node has a fixed 64-bit Node_name assigned by the
manufacturer. The node name will be unique if the manufacturer has registered a range of
addresses with the IEEE, and so is normally referred to as a World-Wide Name. An N_Port
within a parent (WWN) node is also assigned a unique 64-bit Port_Name, which aids the
accessibility of the port and is known as the Port World-Wide Name (PWWN).
In FC SAN environments, the FC switch is responsible for assigning a 24-bit address to each
device as it logs on. Allowing the topology to manage the assignment of addresses has the
advantage that control of the addresses is now performed by the entity that is responsible for
the routing of information. This means that address assignments can be made in a manner
that results in the most efficient routing of frames within that topology.
device as it logs on. Allowing the topology to manage the assignment of addresses has the
advantage that control of the addresses is now performed by the entity that is responsible for
the routing of information. This means that address assignments can be made in a manner
that results in the most efficient routing of frames within that topology.
There are six standard kinds of ports, those used with IBM Flex System V7000 Storage Node
are listed below:
are listed below:
– Node ports (N_Port), these ports are found in Fibre Channel nodes, which are defined
to be the source or destination of information units (IU). I/O devices and host systems
interconnected in point-to-point or switched topologies use N_Ports for their
connection. N_Ports can only attach to other N_Ports or to F_Ports.
interconnected in point-to-point or switched topologies use N_Ports for their
connection. N_Ports can only attach to other N_Ports or to F_Ports.
IBM Flex System Enterprise Chassis
External SAN