Cisco N5K-M1600 - Expansion Module - 6 Ports Troubleshooting Manual page 102

FC Services
S e n d d o c u m e n t c o m m e n t s t o n e x u s 5 k - d o c f e e d b a c k @ c i s c o . c o m .
Use the fcdomain domain <domain-id> [static | preferred] vsan <vsan-id> command to change the
Step 3
domain ID for one of the overlapping domain IDs.
The static option tells the switch to request that particular domain ID. If it does not obtain that
•
particular address, it will isolate itself from the fabric.
The preferred option has the switch request a specified domain ID. If that ID is unavailable, it will
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accept another ID.
Use the fcdomain restart vsan command to restart Domain Manager.
Step 4
While the static option can be applied to runtime after a disruptive or nondisruptive restart, the preferred
option is applied to runtime only after a disruptive restart.
A domain ID restart is disruptive. The Fibre Channel nodes that are logged into that domain will be
Note
logged out and logged back in. A disruptive reconfiguration might affect data traffic.
To assign a dynamic domain ID after a fabric reconfiguration
You can use fabric reconfiguration to reassign domain IDs and resolve any overlapping domain IDs. If
you enable the auto-reconfigure option on both switches before connecting the fabric, a disruptive
reconfiguration (RCF) occurs. The RCF functionality automatically forces a new principal switch
selection and causes new domain IDs to be assigned to the different switches.
To use fabric reconfiguration to reassign domain IDs for a particular VSAN using the NX-OS CLI,
perform the following these steps:
Use the show fcdomain domain-list command to determine if you have statically assigned domain IDs
Step 1
on the switches.
Step 2 If you have statically assigned domain IDs, use the no fcdomain domain command to remove the static
assignments.
Step 3 Use the show fcdomain vsan <vsan-id> command to determine if you have the RCF reject option
enabled.
Example:
switch# show fcdomain vsan 3
The local switch is the Principal Switch.
Local switch run time information:
Local switch configuration information:
Cisco Nexus 5000 Series Troubleshooting Guide
5-30
State: Stable
Local switch WWN: 20:03:00:0d:ec:d5:fe:01
Running fabric name: 20:03:00:0d:ec:d5:fe:01
Running priority: 128
Current domain ID: 0x2c(44)
State: Enabled
FCID persistence: Enabled
Auto-reconfiguration: Disabled
Contiguous-allocation: Disabled
Configured fabric name: 20:01:00:05:30:00:28:df
Optimize Mode: Disabled
Configured priority: 128
Configured domain ID: 0x2c(44) (preferred)
Chapter 5 Troubleshooting SAN Switching Issues
OL-25300-01