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SNC 4000 User’s Guide
19
Scalar Firewall Manager
Scalar Firewall Manager (SFM) is a software feature that collects all host and target information and
manages the end-to-end access control in the SAN. It allows the system administrator to control access
privileges between individual Host Bus Adapters (HBAs) and target devices connected to the SNC’s SCSI
and Fibre Channels. The system administrator uses the ADIC Management Console to administrate SFM.
•
SFM technology enables Storage Area Networks with multiple users to share the same connectivity
channels or pipes to access the same or different storage elements or resources. Therefore,
multiple virtual private connections can be created on the same Storage Networking infrastructure.
•
SFM is completely host independent and requires no software components on the host (an optional
automatic Host Registration Service that provides periodic host status information is included). It
has no interface dependencies and supports Fibre Channel, SCSI, or any other SAN interface. It is
also independent of the storage elements and requires no change in legacy or new storage devices.
•
SFM keeps track of Fibre Channel HBAs by their unique World Wide Name (WWN). Because Fibre
Channel switches also have a WWN, SFM can see FC switches connected to the SNC and control
their access.
•
SFM manages access for hosts connected through FC switches and hubs to the SNC. The SNC
supports up to 2048 LUNs across all of its interfaces. It has a virtual limit for how many hosts (HBAs
or Initiators) are connected to each port. The default setting allows 64 initiators per port.
Consequently, with the default setting, an SNC with its two Fibre Channel ports can support up to
128 host connections.
•
SFM creates and maintains a database in non-volatile memory to hold persistent information about
each HBA (or Initiator) and its LUN access privileges.
•
When you perform a
Save Configuration
from the ADIC Management Console, it saves both the
persistent device map and the SFM database to a file. This allows all configuration settings to be
loaded onto another SNC in the event that the SNC needs to be replaced.
•
When SFM is enabled for the first time, it takes a “snapshot” of the existing configuration. SFM
automatically assigns access between HBAs and the storage elements that they currently have
access to so that an existing configuration will not be affected. Consequently, online hosts attached
to an SNC will continue to retain their current access permissions to storage elements.
•
Any HBA (or Initiator) that is added to a SAN connection at a later time will only have access to the
SNC Command and Control LUN. In this case, the system administrator must explicitly set access
privileges to the desired storage element for each host connection
.
Summary of Contents for SNC 4000
Page 1: ...www adic com ADICSNC 4000User sGuide ADVANCED DIGITAL INFORMATION CORPORATION...
Page 10: ...4 SNC 4000 Introduction...
Page 40: ...34 Removal and Replacement Procedures...
Page 140: ...134 Service Port Command Reference...
Page 147: ...SNC 4000 User s Guide 141 fcConnPortModeGet...
Page 148: ...142 Diagnostic Command Reference...