User`s guide

Chapter 3. Implementing the INRANGE FC/9000 Fibre Channel Director 237
However, since INRANGE is using a Translation Entries List, these LIPs will not
be propagated to other fabric members. This is true even if multiple private loop
ports are zoned together. Therefore, all LIP impact is limited only to the external
physical loop (for example, an FC_AL hub).
This feature is a major benefit of using TL_Ports.
3.4 INRANGE zoning
One of the basic purposes of SAN fabric products is to enable or disable
communication between the different ports (devices) attached to them.
In most cases it is helpful to limit the potential access of ports. Zoning provides
an effective tool to limit and control the communication between fabric ports.
There are multiple possible reasons to limit access and include:
򐂰 We may want to avoid Windows servers seeing all disks in a fabric. Otherwise
there would be a high risk of getting signatures written on all disks which
would then mean these disks are unusable by other operating systems.
򐂰 For security reasons we want to limit the access to disk with confidential data
to only selected servers.
򐂰 We would like to get control of the amount of paths a FC host adapter has to a
specific disk. This is because not all environments are flexible in their usage
of multipathing software.
INRANGE provides three kinds of zoning methods:
򐂰 Hard zoning
򐂰 Name server zoning
򐂰 Broadcast zoning
3.4.1 Understanding INRANGE hard zoning
Hard zoning follows physical boundaries within a single-stage switch chassis,
and limits the communication of a port to only other ports in the same hard zone.
Hard zoning, in certain circumstances, is the only way to provide the required
additional level of security, but careful consideration should be applied prior to
activating any hard zones, as it may be possible to isolate devices.