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24-3
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-6965-03, Cisco MDS SAN-OS Release 2.x
Chapter 24 Additional Configuration
Configuring World Wide Names

Invoking the fcping Feature

To initiate an fcping using Fabric Manager, follow these steps:
Step 1 Choose Tools > Ping. You see the ping dialog box.
Step 2 Set the Source Switch, VSAN, and Target Endport for where you want the ping to begin and end.
Step 3 Click Start to start the fcping. You see the results of the ping in the dialog box.
Step 4 Click Close to close the dialog box.

Configuring World Wide Names

The world wide name (WWN) in the switch is equivalent to the Ethernet MAC address. As with the MAC
address, you must uniquely associate the WWN to a single device. The principal switch selection and
the allocation of domain IDs rely on the WWN. The WWN manager, a process-level manager residing
on the switch’s supervisor module, assigns WWNs to each switch.
To access information on the WWN from Fabric Manager, choose Switches > FC Services > WWN
Manager.
Cisco MDS 9000 Family switches support three network address authority (NAA) address formats (see
Table 24-1).
Caution Changes to the world-wide names should be made by an administrator or individual who is completely
familiar with switch operations.

Link Initialization WWN Usage

Exchange Link Protocol (ELP) and Exchange Fabric Protocol (EFP) use WWNs during link
initialization. The usage details differ based on the Cisco MDS SAN-OS software release:
•In Cisco MDS SAN-OS Release 1.0 and 1.1, both ELPs and EFPs use the VSAN WWN during link
initialization.
•In Cisco MDS SAN-OS Releases 1.2 and 1.3, two different WWNs are used during the link
initialization process:
–
ELPs use the switch WWN.
–
EFPs use the VSAN WWN.
Table 24-1 Standardized NAA WWN Formats
NAA Address NAA Type WWN Format
IEEE 48-bit address Type 1 = 0001b 000 0000 0000b 48-bit MAC address
IEEE extended Type 2 = 0010b Locally assigned 48-bit MAC address
IEEE registered Type 5 = 0101b IEEE company ID: 24 bits VSID: 36 bits