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Setting the Fabric Name
Setting the Fabric Name
By default the configured fabric name is 20:01:00:05:30:00:28:df.
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The fabric name is applied to runtime through a disruptive restart when the fcdomain is configured as
disabled.
Stopping Incoming RCFs
The rcf-reject option is configured on a per-interface, per-VSAN basis. By default, the rcf-reject option
is disabled (that is, RCF request frames are not automatically rejected).
The rcf-reject option takes immediate effect to runtime through a disruptive restart.
Configuring Persistent FC IDs
By default, the persistent FC_ID feature is disabled. When a N/NL-port logs into a switch, and gets
assigned an FC ID, the WWN of the requesting N/NL-port and the assigned FC ID is retained and stored
in a volatile cache (the content is lost after a reboot).
If the persistent FC ID feature is disabled, binding of the FC ID to the WWN is preserved on a best effort
basis.
For example, after the disconnection of one N-Port from the switch, if its FC ID is requested by another
device, the request is granted and the initial association WWN FC ID is released. Also, if the 4K entries
of the volatile cache used to store the WWN-to- FC ID binding get completely filled up, a new (more
recent) entry will overwrite the oldest one, losing the corresponding binding WWN to FC ID.
The behavior is different for an N-Port than for an NL-Port:
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The assigned FC IDs in a fcdomain can be activated to remain persistent, even after a reboot. This
ensures that an attached N Port receives the same FC ID after a switch reboot. If you enable this feature,
the following apply:
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To configure persistent FC IDs from the Fabric Manager, choose FC > Domain Manager on the menu
tree and click the Persistent FCIDs tab. The Information pane from the Fabric Manager displays
persistent FC IDs for multiple switches.
Cisco MDS 9000 Fabric Manager Switch Configuration Guide
26-8
When the fcdomain feature is disabled, the runtime fabric name is the same as the configured fabric
name.
When the fcdomain feature is enabled, the runtime fabric name is the same as the principal switch
WWN.
N-ports should receive the same FC IDs if unplugged and plugged back in any port of the same
switch (as long as it belongs to the same VSAN)
NL-port should receive the same FC IDs only if connected back to the same interface on the switch
it was connected originally.
The currently "in-use" FC IDs in the fcdomain will be saved across reboots.
The fcdomain automatically populates the database with dynamic entries that the switch has learned
about after a device (host or disk) is plugged into a port interface.
Chapter 26
Configuring Domain Parameters
OL-7753-01
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