Cisco Nexus 5000 Series Switch CLI Software Configuration Guide, NX-OS 4.0(1a)N1 (OL-16597-01, January 2009)

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Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
OL-16597-01
Chapter 33 Configuring Domain Parameters
Domain IDs
Rejecting Incoming RCFs
To reject incoming RCF request frames, perform this task:
About Autoreconfiguring Merged Fabrics
By default, the autoreconfigure option is disabled. When you join two switches belonging to two
different stable fabrics that have overlapping domains, the following situations can occur:
• If the autoreconfigure option is enabled on both switches, a disruptive reconfiguration phase is
started.
• If the autoreconfigure option is disabled on either or both switches, the links between the two
switches become isolated.
The autoreconfigure option takes immediate effect at runtime. You do not need to restart the fcdomain.
If a domain is currently isolated due to domain overlap, and you later enable the autoreconfigure option
on both switches, the fabric continues to be isolated. If you enabled the autoreconfigure option on both
switches before connecting the fabric, a disruptive reconfiguration (RCF) will occur. A disruptive
reconfiguration may affect data traffic. You can nondisruptively reconfigure the fcdomain by changing
the configured domains on the overlapping links and eliminating the domain overlap.
Enabling Autoreconfiguration
To enable automatic reconfiguration in a specific VSAN (or range of VSANs), perform this task:
Domain IDs
Domain IDs uniquely identify a switch in a VSAN. A switch may have different domain IDs in different
VSANs. The domain ID is part of the overall FC ID.
Command Purpose
Step 1
switch# configuration terminal
switch(config)#
Enters configuration mode.
Step 2
switch(config)# interface fc slot/port
switch(config-if)#
Configures the specified interface.
Step 3
switch(config-if)# fcdomain rcf-reject vsan
vsan-id
Enables the RCF filter on the specified
interface in the specified VSAN.
switch(config-if)# no fcdomain rcf-reject vsan
vsan-id
Disables (default) the RCF filter on the
specified interface in the specified VSAN.
Command Purpose
Step 1
switch# configuration terminal
switch(config)#
Enters configuration mode.
Step 2
switch(config)# fcdomain auto-reconfigure vsan
vsan-id
Enables the automatic reconfiguration
option in the specified VSAN.
switch(config)# no fcdomain auto-reconfigure vsan
vsan-id
Disables the automatic reconfiguration
option and reverts it to the factory default in
the specified VSAN.