Cisco MDS 9000 Series Configuration Guide

switch-2# show device-alias database
...output trimmed to show only mismatched device-alias
device-alias name A1 pwwn 21:01:01:01:01:01:01:03
Step 4 Run the device-alias name name pwwn id command to change the pWWN on one of the switches to match the pWWN
on the other switch.
Perform this step after device-alias distribution is disabled by running the no device-alias distribute command.
Note
In the following example, the pWWN 21:01:01:01:01:01:01:02 on switch-1 is changed to match the pWWN
21:01:01:01:01:01:01:03 on switch-2:
switch-1# configure
Enter configuration commands, one per line. End with CNTL/Z.
switch-1(config)# device-alias database
switch-1(config-device-alias-db)# no device-alias name A1
switch-1(config-device-alias-db)# show device-alias database | i A1
switch-1(config-device-alias-db)# device-alias name A1 pwwn 21:01:01:01:01:01:01:03
switch-1(config-device-alias-db)# show device-alias database | i A1
device-alias name A1 pwwn 21:01:01:01:01:01:01:03
Step 5 If there are more duplicate device-alias names, perform step Step 3, on page 175 and step Step 4, on page 176 to resolve
the duplicate device-alias names issue.
Step 6 Use the device-alias distribute command to enable the device-alias distribution and initiate a merge:
switch-1(config)# device-alias distribute
Step 7 Use the show cfs merge status name device-alias command to verify in the output if the merge was successful.
Resolving Duplicate pWWNs (Different Device Alias Names, Same pWWN)
To verify that the same pWWN is mapped to different device-alias names in fabrics, perform these steps:
Step 1 Run the show device-alias merge status command to identify if the reason for the merge failure is a database mismatch:
switch# show device-alias merge status
Result: Failure
Reason: Another device-alias already present with the same pwwn.
A properly merged device-alias application should only show a single merge master. If there is more than one
merge master, as shown in the above example, it indicates that the device-alias databases are not merged.
Note
Step 2 Review the CFS or the device-alias merge failure syslog to confirm that the merge failed. Alternatively, run the show
cfs merge status name device-alias command to view the status of the merge:
switch# show cfs merge status name device-alias
Physical-fc Merge Status: Failed [ Mon Apr 9 15:57:58 2007 ] <===Merge status
Local Fabric
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
176
Distributing Device Alias Services
Resolving Duplicate pWWNs (Different Device Alias Names, Same pWWN)

Cisco MDS 9000 Series Specifications

General

Category	Switch
Operating System	Cisco NX-OS
Ports	Varies by model
Protocols	Fibre Channel (FC), Fibre Channel over IP (FCIP), iSCSI
Redundancy	Redundant supervisors, power supplies, and fans
Management	Cisco Data Center Network Manager (DCNM), CLI, SNMP
Virtualization Support	VSANs (Virtual SANs)
Security Features	Fibre Channel Security Protocol (FC-SP)
Hot Swappable Components	power supplies, fans
Power Supply Options	AC and DC options available