Configuring Backbone Fabrics For Interconnectivity; Setting The Maximum Lsan Count; Ha And Downgrade Considerations For Lsan Zones - HP SN3000B Administrator's Manual

Configuring backbone fabrics for interconnectivity

If you want devices in backbone fabrics to communicate with devices in edge fabrics, set up the
LSANs as described in the section
However, instead of configuring the LSAN in the second edge fabric, configure the LSAN in the
backbone fabric.

Setting the maximum LSAN count

You can set the maximum number of LSAN zones, or LSAN count, that can be configured on the
edge fabrics. By default, the maximum LSAN count is set to 3000. You can increase the maximum
LSAN count to 5000 without disabling the switch.
The maximum number of LSAN devices supported is 10,000 (this includes both physical and proxy
devices). If you have 3000 LSAN zones but have not exceeded the 10,000 device limit, you can
increase the LSAN count to 5000.
All FC routers in the same backbone fabric should have the same maximum LSAN count defined, to
prevent the FC routers from running into indefinite state. Asymmetric LSAN configurations due to
different maximum LSAN counts could lead to different devices being imported on different FC
routers.
1. Enter the fcrlsancount command with no parameters to display the current LSAN limit.
2. Enter the fcrlsancount command and specify the new LSAN zone limit.
For information on how to display the maximum allowed and currently used LSAN zones and
devices, refer to
NOTE
Because the maximum number of LSANs is configured for each switch, if there is a different
maximum LSAN count on the switches throughout the metaSAN, then the device import/export will
not be identical on the FC routers. You should enter the same maximum LSAN count for all the FC
routers in the same backbone that support this feature. Verify the configured maximum limit against
the LSANs configured using the fcrResourceShow command.

HA and downgrade considerations for LSAN zones

Be aware of how LSAN zones impact high availability and firmware downgrades:
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Fabric OS Administrator's Guide
53-1002446-01
switch:admin> fcrlsancount
LSAN Zone Limit 3000
switch:admin> fcrlsancount 5000
LSAN Zone Limit 5000
"Resource monitoring"
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.
"Controlling device communication with the LSAN"
on page 500.
LSAN zone configuration
on page 486.
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