Verifying Wwn Information; Link Initialization Wwn Usage; Configuring A Secondary Mac Address; Fc Id Allocation For Hbas - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Verifying WWN Information

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:
Procedure
Step 1
Step 2
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

FC ID Allocation for HBAs

Fibre Channel standards require a unique FC ID to be allocated to an N port attached to an F port in any
switch. To conserve the number of FC IDs used, Cisco Nexus 5000 Series switches use a special allocation
scheme.
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
612
Configured Available
---------- --------------
64 48 ( 75%)
524288 442368 ( 84%)
Command or Action
switch# configuration terminal
switch(config)# wwn secondary-mac wwn-id
range value
Advanced Fibre Channel Features and Concepts
Resvd. Alarm State
------ -----------
16 NONE
73728 NONE
0 Available: 256
Purpose
Enters configuration mode.
Configures the secondary MAC address. This
command cannot be undone.
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