Registered state change notification
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Fibre Channel 8b/10b encoding | |
---|---|
Layer 0. Physical |
In
Fibre Channel fabric's notification sent to all specified nodes
in case of any major fabric changes. This allows nodes to immediately gain knowledge about the fabric and react accordingly.
Overview
Implementation of this function is obligatory for each Fibre Channel switch, but is optional for a node. This function belongs to a second level of the protocol, or FC2.
Some events that trigger notifications are:
- Nodes joining or leaving the fabric (most common usage)
- Switches joining or leaving the fabric
- Changing the switch name
The nodes wishing to be notified in such way need to register themselves first at the Fabric Controller, which is a standardized FC virtual address present at each switch.
RSCN and zoning
If a fabric has some zones configured for additional security, notifications do not cross zone boundaries if not needed. Simply, there is no need to notify a node about a change that it cannot see anyway (because it happened in a separate zone).
Example
For example, let's assume there is a fabric with just one node, namely a server's FC-compatible
block devices
, ready for use.
See also
- Storage area network
- Fibre Channel
- Fibre Channel fabric
- Fibre Channel switch
- Fibre Channel zoning
External links
- DeSanti; et al. (August 2007). "RFC 4983: Fibre Channel Registered State Change Notification (RSCN) MIB". IETF. )