Cisco Nexus 5000 Series Switch CLI Software Configuration Guide, NX-OS 4.0(1a)N1 (OL-16597-01, January 2009)

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41-3
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
OL-16597-01
Chapter 41 Managing FLOGI, Name Server, FDMI, and RSCN Databases
Name Server Proxy
Rejecting Duplicate pWWNs
To reject duplicate pWWNs, perform this task:
About Name Server Database Entries
The name server stores name entries for all hosts in the FCNS database. The name server permits an Nx
port to register attributes during a PLOGI (to the name server) to obtain attributes of other hosts. These
attributes are deregistered when the Nx port logs out either explicitly or implicitly.
In a multiswitch fabric configuration, the name server instances running on each switch shares
information in a distributed database. One instance of the name server process runs on each switch.
Displaying Name Server Database Entries
The following example shows how to display the name server database for all VSANs:
switch# show fcns database
--------------------------------------------------------------------------
FCID TYPE PWWN (VENDOR) FC4-TYPE:FEATURE
--------------------------------------------------------------------------
0x010000 N 50:06:0b:00:00:10:a7:80 scsi-fcp fc-gs
0x010001 N 10:00:00:05:30:00:24:63 (Cisco) ipfc
0x010002 N 50:06:04:82:c3:a0:98:52 (Company 1) scsi-fcp 250
0x010100 N 21:00:00:e0:8b:02:99:36 (Company A) scsi-fcp
0x020000 N 21:00:00:e0:8b:08:4b:20 (Company A)
0x020100 N 10:00:00:05:30:00:24:23 (Cisco) ipfc
0x020200 N 21:01:00:e0:8b:22:99:36 (Company A) scsi-fcp
The following example shows how to display the name server database and statistical information for a
specified VSAN:
switch# show fcns database vsan 1
VSAN 1:
--------------------------------------------------------------------------
FCID TYPE PWWN (VENDOR) FC4-TYPE:FEATURE
--------------------------------------------------------------------------
0x030001 N 10:00:00:05:30:00:25:a3 (Cisco) ipfc
0x030101 NL 10:00:00:00:77:99:60:2c (Interphase)
0x030200 N 10:00:00:49:c9:28:c7:01
0xec0001 NL 21:00:00:20:37:a6:be:14 (Seagate) scsi-fcp
Total number of entries = 4
The following example shows how to display the name server database details for all VSANs:
switch# show fcns database detail
Command Purpose
Step 1
switch# configuration terminal
switch(config)#
Enters configuration mode.
Step 2
switch(config)# fcns reject-duplicate-pwwn vsan
vsan-id
Logs out devices when they log into the
fabric if the pWWNs already exist.
switch(config)# no fcns reject-duplicate-pwwn
vsan vsan-id
Overwrites the first device’s entry in the
name server database with the new device
having the same pWWN (default).