Verifying The Wwn Configuration; Link Initialization Wwn Usage; Configuring A Secondary Mac Address - Cisco Nexus 5000 Series Configuration Manual

Advanced Fibre Channel Features
Changes to the world-wide names should be made by an administrator or individual who is completely
Caution
familiar with switch operations.

Verifying the WWN Configuration

Use the show wwn commands to display the status of the WWN configuration. This example shows how to
display the status of all WWNs:
switch# show wwn status
Type
----
1
2,5
This example shows how to display 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:
Block Allocation Status: FREE
This example shows how to display 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

You can allocate secondary MAC addresses.
SUMMARY STEPS
1. configure terminal
2. wwn secondary-mac wwn-id range value
OL-27583-01
Configured Available
---------- --------------
64 48 ( 75%)
524288 442368 ( 84%)
Cisco Nexus 5000 Series NX-OS SAN Switching Configuration Guide, Release 5.2(1)N1(1)
Resvd. Alarm State
------ -----------
16 NONE
73728 NONE
0 Available: 256
World Wide Names
225