Autoreconfiguring Merged Fabrics; Enabling Autoreconfiguration - Cisco Nexus 5500 Series NX-OS Configuration Manual

Configuring Fibre Channel Domain Parameters
Step 2
Step 3

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 can 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

You can enable automatic reconfiguration in a specific VSAN (or range of VSANs).
Procedure
Step 1
Step 2
OL-30895-01
Command or Action
fcdomain rcf-reject vsan vsan-id
Example:
switch(config-if)# fcdomain rcf-reject
vsan 10
no fcdomain rcf-reject vsan vsan-id
Example:
switch(config-if)# no fcdomain
rcf-reject vsan 10
Command or Action
configure terminal
Example:
switch# configure terminal
switch(config)#
fcdomain auto-reconfigure vsan vsan-id
Example:
switch(config)# fcdomain
auto-reconfigure vsan 1
Cisco Nexus 5500 Series NX-OS SAN Switching Configuration Guide, Release 7.x
Fibre Channel Domains
Purpose
Enables the RCF filter on the specified interface
in the specified VSAN. The VSAN ID ranges
from 1 to 4093.
Disables (default) the RCF filter on the specified
interface in the specified VSAN. The VSAN ID
ranges from 1 to 4093.
Purpose
Enters global configuration mode.
Enables the automatic reconfiguration option in
the specified VSAN. The VSAN ID ranges from
1 to 4093.
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