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32 Scalar Firewall Manager

Combining SFM with Channel Zoning

In certain instances, it may be an advantage to combine the channel level security of channel zoning with

the advanced LUN level security of Scalar Firewall Manager (SFM) to achieve a mix of load balancing and

host-specific security. In this situation, channel zoning provides load balancing while SFM delivers resource

security and hetergenous host support.

Channel zoning enables load balancing by configuring certain SCSI channels to be accessible only across

specific SAN connections. This is typically done by defining SCSI channels 1 and 2 to be accessible through

FC port 1 of the SNC, and SCSI channels 3 and 4 to be accessible through FC port 2. This ensures that

data traffic is split across the SNC 6101 SAN interfaces.

SFM is configured as usual, but the administrator must be aware that SFM does not override channel

zoning. A host must have LUN level access to a drive through SFM and be bound to the correct SNC FC

port. If the host is incorrectly connected to the SNC, the combination of channel zoning and SFM may

prevent the host from seeing resources.

Note

When troubleshooting a configuration with both SFM and channel zoning

enabled, the administrator must check all security settings to ensure a host can

see devices.

For example, SFM is configured to allow host A to have access to LUN 3, a

drive on SCSI channel 3. Channel Zoning is configured for FC port 1 to access

SCSI ports 1 & 2 and FC port 2 to access SCSI ports 3 & 4. For the host to

properly see LUN 3, the drive on SCSI channel 3, the host must connect to FC

port 2 of the SNC.

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Quantum Scalar 100 Guía de usuario Pagina 36