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25-3
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 25 Configuring Domain Parameters
Fibre Channel Domains
• Restarting a Domain, page 25-3
• About Switch Priority, page 25-5
• Configuring Switch Priority, page 25-5
• About fcdomain Initiation, page 25-5
• Enabling or Disabling fcdomains, page 25-6
• Configuring Fabric Names, page 18-8
• About Incoming RCFs, page 25-6
• Rejecting Incoming RCFs, page 25-7
• About Autoreconfiguring Merged Fabrics, page 25-7
• Enabling Autoreconfiguration, page 25-8
About Domain Restart
Fibre Channel domains can be started disruptively or nondisruptively. If you perform a disruptive restart,
reconfigure fabric (RCF) frames are sent to other switches in the fabric and data traffic is disrupted on
all the switches in the VSAN (including remotely segmented ISLs). If you perform a nondisruptive
restart, build fabric (BF) frames are sent to other switches in the fabric and data traffic is disrupted only
on the switch.
If you are attempting to resolve a domain ID conflict, you must manually assign domain IDs. A
disruptive restart is required to apply most configuration changes–including manually assigned domain
IDs. Nondisruptive domain restarts are acceptable only when changing a preferred domain ID into a
static one (and the actual domain ID remains the same).
Note A static domain is specifically configured by the user and may be different from the runtime domain. If
the domain IDs are different, the runtime domain ID changes to take on the static domain ID after the
next restart, either disruptive or nondisruptive.
Tip If a VSAN is in interop mode, you cannot restart the fcdomain for that VSAN disruptively.
You can apply most of the configurations to their corresponding runtime values. Each of the following
sections provide further details on how the fcdomain parameters are applied to the runtime values.
Restarting a Domain
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