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

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Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
OL-16597-01
Chapter 43 Advanced Fibre Channel Features and Concepts
World Wide Names
Verifying WWN Information
Use the show wwn commands to display the status of the WWN configuration. The following example
displays the status of all WWNs:
switch# show wwn status
Type Configured Available Resvd. Alarm State
---- ---------- -------------- ------ -----------
1 64 48 ( 75%) 16 NONE
2,5 524288 442368 ( 84%) 73728 NONE
The following example displays the information for block ID 51:
switch# show wwn status block-id 51
WWNs in this block: 21:00:ac:16:5e:52:00:03 to 21:ff:ac:16:5e:52:00:03
Num. of WWNs:: Configured: 256 Allocated: 0 Available: 256
Block Allocation Status: FREE
The following example displays the WWN for a specific switch:
switch# show wwn switch
Switch WWN is 20:00:ac:16:5e:52:00:00
Link Initialization WWN Usage
Exchange Link Protocol (ELP) and Exchange Fabric Protocol (EFP) use WWNs during link
initialization. ELPs and EFPs both use the VSAN WWN by default during link initialization. However,
the ELP usage changes based on the peer switch’s usage:
If the peer switch ELP uses the switch WWN, then the local switch also uses the switch WWN.
If the peer switch ELP uses the VSAN WWN, then the local switch also uses the VSAN WWN.
Configuring a Secondary MAC Address
To allocate secondary MAC addresses, perform this task:
The following example shows how to configure the secondary MAC address:
switch(config)# wwn secondary-mac 00:99:55:77:55:55 range 64
This command CANNOT be undone.
Please enter the BASE MAC ADDRESS again: 00:99:55:77:55:55
Please enter the mac address RANGE again: 64
From now on WWN allocation would be based on new MACs.
Are you sure? (yes/no) no
You entered: no. Secondary MAC NOT programmed
Command Purpose
Step 1
switch# configuration terminal
Enters configuration mode.
Step 2
switch(config)# wwn secondary-mac wwn-id
range value
Configures the secondary MAC address. This
command cannot be undone.