Fabric OS Administrator's Guide v7.0.0 (53-1002148-02, June 2011)

Fabric OS Administrator’s Guide 485
53-1002148-02
LSAN zone configuration
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HA and downgrade considerations for LSAN zones
Be aware of how LSAN zones impact high availability and firmware downgrades:
• The LSAN zone matrix is synchronized to the standby CP.
• On a dual CP switch, both CPs must have Fabric OS v5.3.0 or later to enable the feature.
• If the feature is enabled on the active CP, introducing a CP with an earlier version of Fabric OS
as a standby will cause HA synchronization to fail.
• If the feature is enabled, before downgrading to an earlier Fabric OS version, you will be asked
to go back to the default mode.
• This feature does not have any impact on current HA functionality. LSANs will be synchronized
as usual after the limit is increased and new LSANs are created.
LSAN zone policies using LSAN tagging
You can create tags for LSAN zones to give them a special meaning.
LSAN zones are zones with names that start with the “lsan_” prefix. You can specify a tag to
append to this prefix that causes the LSAN zone to be treated differently.
You can specify two types of tags:
• Enforce tag – Specifies which LSANs are to be enforced in an FC router.
• Speed tag – Specifies which LSANs are to be imported or exported faster than other LSANs.
The LSAN tags are persistently saved and support configupload and configdownload.
Enforce tag
The Enforce tag reduces the resources used in an FC router by limiting the number of LSAN zones
that will be enforced in that FC router.
Use the Enforce tag to achieve better scalability in the FC router. This is useful when multiple FC
routers are connected to the same edge fabric. Without the Enforce tag, all FC routers import all
LSAN zones, even those that are not needed.
Normally the FC router automatically accepts all zones with names that start with “lsan_”. You can
specify an Enforce tag to indicate that a particular FC router should only accept zones that start
with the prefix “lsan_tag”. For example, if you specify an Enforce tag of “abc”, the FC router accepts
only those LSAN zones that start with “lsan_abc” and does not import or export any other LSAN
zones.
The Enforce tag can be up to 8 characters long and can contain only letters and numbers. The
Enforce tag is case-insensitive; for example, the tag “abc” is equivalent to “ABC” and “Abc”.
If you specify “abc”, “xyz”, and “fab1” as Enforce tags, then the FC router accepts only those LSAN
zones with names that start with any of the following:
lsan_abc
lsan_xyz
lsan_fab1