EMC Connectrix ED-64M, Руководство пользователя

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Connectrix ED-64M User Guide
Configuring the Director
Rerouting Delay Placing a check mark in the checkbox to the left of the Rerouting
Delay
option enables rerouting delay. This option is applicable only if
the director is in a multiswitch fabric. The default state is Disabled.
Enabling the rerouting delay ensures that frames are delivered in
order through the fabric to their destination. If there is a change to the
fabric topology that creates a new path (for example, a new switch is
added to the fabric), frames may be routed over this new path if its
hop count is less than a previous path with a minimum hop count.
This may result in frames being delivered to a destination out of
order since frames sent over the new, shorter path may arrive ahead
of older frames still in route over the older path.
If the rerouting delay is enabled, traffic ceases in the fabric for the
time specified for E_D_TOV. This delay allows frames sent on the old
path to exit to their destination before new frames begin traversing
the new path.
Domain RSCNs
This option must be enabled if Enterprise Fabric Mode (an optional
Enterprise Fabric Extensions feature) is enabled.
If this option is enabled (checked), Domain RSCNs (register for state
change notifications ) are sent between end devices in a fabric to
provide additional connection information to host bus adapters
(HBAs) and storage devices.
Click the check box to remove or add a checkmark. (The default state
is disabled.)
As an example, this information might be that a logical path has been
broken because of a physical event, such as a fiber-optic cable being
disconnected from a port. Consult with your HBA and storage device
vendor to determine if enabling Domain RSCNs will cause problems
with your HBA or storage products.
Suppress RSCNs on
Zone Set Activations
If this option is disabled (unchecked), fabric-format RSCNs are sent
to ports on the director following any change to the fabric’s active
zone set.
Click the checkbox to remove or add a checkmark.
In most cases, you should leave this parameter at the default state of
disabled
, so attached devices can receive notification of zoning
changes in the fabric. However, some HBAs might log out, and then
log back in to the fabric when they receive an RSCN, thereby
disrupting Fibre Channel traffic. Consult your HBA vendor and your