Cisco MDS 9000 Series Configuration Guide

Database Merge Guidelines
For information about CFS merge support, refer to the Cisco MDS 9000 Family NX-OS System Management
Configuration Guide for detailed concepts.
When merging two device alias databases, follow these guidelines:
• Verify that two device aliases with different names are not mapped to the same pWWN.
• Verify that two different pWWNs are not mapped to the same device aliases.
• Verify that the combined number of device aliases in both databases cannot exceed 8191 (8K) in fabrics
running SAN-OS Release 3.0(x) and earlier, and 20K in fabrics running SAN-OS Release 3.1(x) and
later. If the combined number of device entries exceeds the supported limit, then the merge will fail.
• Ensure the device -alias mode is similar for the both the fabrics being merged.
Device Alias Configuration Verification
You can view device alias information by using the show device-alias command. See the following examples.
Displays All Configured Device Aliases from the Effective Database
switch# show
device-alias database
device-alias name SampleName pwwn 21:00:00:e0:8b:0b:66:56
device-alias name x pwwn 21:01:00:e0:8b:2e:80:93
Total number of entries = 2
Displays the Pending Database with No Modifications
switch# show
device-alias database pending
There are no pending changes
Displays the Pending Database with Modifications
switch# show
device-alias database pending
device-alias name x pwwn 21:01:00:e0:8b:2e:80:93
device-alias name SampleName pwwn 21:00:00:e0:8b:0b:66:56
device-alias name y pwwn 21:00:00:20:37:39:ab:5f
device-alias name z pwwn 21:00:00:20:37:39:ac:0d
Total number of entries = 4
Displays the Specified Device Name in the Pending Database
switch# show
device-alias name x pending
device-alias name x pwwn 21:01:00:e0:8b:2e:80:93
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
169
Distributing Device Alias Services
Database Merge Guidelines

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