Compaq Infortrend manual LUN Mask ID Range Configuration, Filter Type Include or Exclude

LUN Mask (ID Range) Configuration:

Ranges can be established by combining a basis ID with a mask similar to the way routing table entries are set up on a LAN/WAN. If the port name ID "AND'ed" with the mask equals the basis ID AND'ed with the mask, then the port name ID is considered to fall within the range. If a default value "0xFFFFFFFFFFFFFF" is selected, then the port name ID must match the basis ID for the port name to be considered to fall within the range. "0x" means that all values are

presented in hexadecimal. If, for instance, a value "0xFFFFFFFFFFFFFC" is selected, and the basic ID is "0x11111111111111," port name IDs ranging from "0x….1110" to

"0x….1113" will fall in the ID range.

As the general rule, a host HBA's port name can be used as the basic ID. If a host adapter's port name is used as the basic ID and the default mask value, "0xFFFFFFFFFFFFFF," is applied, the host will fall exactly within the ID range for the port name ID AND'ed with mask equals the basic ID AND'ed with mask.

Filter Type: Include or Exclude

Filter entry can serve both ends: to include or exclude certain adapters from data access.

Include: If a node's (a workstation or a server) WWN falls in an ID range specified as "Include," the node will be allowed to access the storage capacity mapped to the associated LUN. The access mode can be "read only" or "read/write."

Exclude: If a node's WWN falls in an ID range specified as "Exclude," the node will not be allowed to access the storage capacity mapped with this entry.

Multiple ranges, or filter entries, can be established for a single channel, target-ID, and LUN combination. Each range can have its own Exclude/Include attributes. The rules for determining whether a particular ID is considered as "included" or "excluded" are listed below:

1.If an ID falls within one or more Include ranges and does not fall in any Exclude range, then it is included.

2.If an ID falls within ANY Exclude range no matter if it also falls in another Include range, then it is excluded.

3.If the ID falls in none of the ranges and there is at least one Include range specified, then the ID should be considered as excluded.

4.If the ID falls in none of the ranges and only Exclude ranges are specified, then the ID is considered as included.

Fibre Operation 8-19