Lsan Zone Binding (Optional) - HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual

LSAN zone binding (optional)

By default, the Fibre Channel routers (FCR) in the backbone maintain the entire LSAN zone and device
state database. On Fibre Channel routers with Fabric OS 5.3.0 and later, the LSAN zone binding allows
you to specify pairs of edge fabrics that share devices, effectively creating an LSAN fabric matrix. The Fibre
Channel router uses this information to store only the LSAN zone entries of the remote edge fabrics that can
access its local edge fabrics and also to search and do a pair match only against the specified edge
fabrics. The advantage is that an individual Fibre Channel router may store fewer LSAN zone entries, and
the LSAN zone limit supported in the backbone will not be limited by the capability of one FCR. In
addition, the pair match calculation that establishes the devices import/export states will consume less
CPU time since the pair match will be done within the specified fabric boundaries and not against all the
edge fabrics in the backbone. If you choose not to implement this feature, the LSAN zone retains its default
behavior.
If you decide to implement LSAN zone binding, then the imported devices in the metaSAN are not limited
by the 10,000 LSAN device entries. Due to the lower LSAN count, the CPU consumption by the Fibre
Channel router will be lower. If you configure the metaSAN such that the backbone has two groups of
FCRs and there are no LSAN zone sharing and devices access between the two groups, the number of
Fibre Channel routers and devices supported in the backbone can be higher.
The command fcrlsanmatrix is used to specify pairs of edge fabric IDs that will share devices. Those
edge fabrics will have access only to the edge fabrics associated with them using this command. This
LSAN fabric matrix is saved persistently and referred to as static binding. The edge fabrics that were not
specified will have access to the rest of the other edge fabrics that were not specified. This association of
the edge fabric IDs is called default or dynamic binding, which is the default behavior. Using this
information, the FCR switch will maintain the remote LSAN Zone and the device state database only if it is
associated with its local edge fabrics.
NOTE: This feature is supported only in a fabric with Fabric OS 5.3.0 and later Fibre Channel routers in
the backbone.
The fcrlsanmatrix command is local to a Fibre Channel router and its configuration data will be saved
locally. The configuration is not distributed automatically to other Fibre Channel routers on the backbone.
The fcrlsanmatrix command is used to configure each of the FCRs in the backbone that support this
feature.
For example, if edge fabrics with IDs 1, 2, 3, 4, and 5 are online, the default behavior is that every edge
fabric allows access to each other. If later on, FIDs 1 and 2 are specified to have exclusive access using the
command fcrlsanmatrix, then:
• FID 1 can access only FID 2.
• FID 2 can access only FID 1.
• FIDs 3, 4 and 5 can access each other but cannot access FIDs 1 or 2.
The FIDs entered do not need to be online when setting up the LSAN fabric matrix. The LSAN fabric matrix
information is saved per Fibre Channel router and not distributed to other FCRs automatically. The best
practice is to enter the same information for all the Fibre Channel routers in the backbone that support this
command.
The fcrlsanmatrix command is explained in detail below:
fcrlsanmatrix [--add FabricID1 FabricID2] [--remove FabricID1 FabricID2]
[--apply] [--cancel] [--display] [--fabricview] [--verify] [--quickmode
command with no option Displays the matrix information that is saved in the persistent memory.
FabricID1 FabricID2
add
--
remove
--
apply
--
Specifies the fabric ID of the two edge fabrics that will be paired.
Adds the pair of FIDs to the cache.
Removes the pair of FIDs from the cache.
Applies the changes from the cache to persistent memory.
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