Rerouting Delay; Domain Rscns - HP 316095-B21 - StorageWorks Edge Switch 2/24 Installation Manual

Installing and Configuring the Edge Switch 2/24

Rerouting Delay

Placing a check mark in the check box to the left of the Rerouting Delay option
enables rerouting delay. This option is only applicable if the configured switch 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 rerouting delay is enabled, traffic ceases in the fabric for the time specified in
the E_D_TOV field of the Configure Fabric Parameters dialog box. This delay
allows frames sent on the old path to exit to their destination before new frames
begin traversing the new path.
Note:

Domain RSCNs

Domain register for state change notifications (domain RSCNs) are sent between
end devices in a fabric to provide additional connection information to host bus
adapters (HBA) and storage devices. 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. Note that this option is required if Enterprise
Fabric Mode (optional SANtegrity binding feature) is enabled.
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If you enable Insistent Domain while the switch or Director is online, the
Preferred Domain ID will change to the current active domain ID if the IDs
are different.
Caution: If a switch with a duplicate domain ID exists in the fabric, both
switches' E_Ports will segment when they try to join.
This option is required if you are using the HAFM appliance.
Edge Switch 2/24 Installation Guide