Cisco Nexus 5000 Series Switch CLI Software Configuration Guide (OL-16597-01, July 2009)

Name Server Proxy
The name server functionality maintains a database containing the attributes for all hosts and storage devices
in each VSAN. Name servers allow a database entry to be modified by a device that originally registered the
information.
The proxy feature is useful when you need to modify (update or delete) the contents of a database entry that
was previously registered by a different device.
About Registering Name Server Proxies
All name server registration requests come from the same port whose parameter is registered or changed. If
it does not, then the request is rejected.
This authorization enables WWNs to register specific parameters for another node.
Registering Name Server Proxies
To register the name server proxy, perform this task:
Procedure
PurposeCommand or Action
Enters configuration mode.switch# configuration terminal
Step 1
Configures a proxy port for the specified
VSAN.
switch(config)#fcns proxy-port wwn-id vsan
vsan-id
Step 2
About Rejecting Duplicate pWWNs
You can prevent malicious or accidental log in using another device’s pWWN by enabling the
reject-duplicate-pwwn option. If you disable this option, these pWWNs are allowed to log in to the fabric and
replace the first device in the name server database.
Rejecting Duplicate pWWNs
To reject duplicate pWWNs, perform this task:
Procedure
PurposeCommand or Action
Enters configuration mode.switch# configuration terminal
Step 1
Logs out devices when they log into the fabric if
the pWWNs already exist.
switch(config)# fcns
reject-duplicate-pwwn vsan vsan-id
Step 2
Overwrites the first device’s entry in the name
server database with the new device having the
same pWWN (default).
switch(config)# no fcns
reject-duplicate-pwwn vsan vsan-id
Step 3
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
594 OL-16597-01
Managing FLOGI, Name Server, FDMI, and RSCN Databases
Name Server Proxy