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

Advanced Fibre Channel Features and Concepts

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
----
1
2,5
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:
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:
SUMMARY STEPS
1. switch# configuration terminal
2. switch(config)# wwn secondary-mac wwn-id range value
DETAILED STEPS
Command or Action
Step 1 switch# configuration terminal
Step 2 switch(config)# wwn secondary-mac wwn-id range
value
OL-xxxxx-xx
Configured Available
---------- --------------
64 48 ( 75%)
524288 442368 ( 84%)
Resvd. Alarm State
------ -----------
16 NONE
73728 NONE
0 Available: 256
Purpose
Enters configuration mode.
Configures the secondary MAC address. This command
cannot be undone.
Cisco Nexus 5000 Series NX-OS SAN Switching Configuration Guide
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