Planning For Network And Communications Requirements; Host Attachment Communication Requirements - IBM TotalStorage DS6000 Introduction And Planning Manual
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- Redbook (578 pages) ,
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Planning for network and communications requirements
You must locate your DS6000 series in a location that meets the network and
communications requirements.
Keep in mind the following network and communications issues when you plan the
location and interoperability of your storage complex:
v Host attachment requirements
v Remote support connection requirements
v SAN considerations
Host attachment communication requirements
This list describes requirements and other considerations for connecting host
attachments in your network.
v You must use worldwide port names to uniquely identify fibre-channel adapter
v For open-system hosts with fibre-channel adapters, keep in mind that
v The maximum distance between a host fibre-channel port and the following
v Because the fibre-channel architecture allows any fibre-channel initiator to access
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Introduction and Planning Guide
cards that are installed in your host system.
fibre-channel architecture provides a variety of communication protocols. Each
interconnected storage unit within the architecture is referred to as a node, and
each host is also a node. Each node corresponds to one or more ports. (In the
case of fibre-channel I/O adapters, these ports are fibre-channel ports.) Each port
attaches to a serial-transmission medium that provides duplex communication
with the node at the other end of the medium. You can configure your network
structure based on one of three basic interconnection topologies (network
structures):
– Point-to-point
– Switched fabric
– Arbitrated loop
See the IBM TotalStorage DS6000 Host Systems Attachment Guide, for more
information about these supported topologies.
network components is 11 km (6 mi):
– Fabric switches
– Fabric hubs
– Link extenders
– Storage unit fibre-channel port
The maximum distance might be greater than 11 km (6 mi) when a link extender
provides target initiator functions or controller emulation functions.
Note: Do not use link extenders with emulation functions on links over which
remote mirror and copy operations are performed. This is because of the
additional path delay that is introduced by these units.
any fibre-channel device, without access restrictions, this can represent a
security exposure. You must set the fibre-channel access modes to the proper
setting. See the IBM TotalStorage DS6000 Host Systems Attachment Guide, for
more information about fibre-channel access modes.
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