Configuring World Wide Names; Link Initialization Wwn Usage; Configuring A Secondary Mac Address - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

Chapter 68 Troubleshooting Your Fabric
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

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.
Cisco MDS 9000 Family switches support three network address authority (NAA) address formats (see
Table
Table 68-1
NAA Address
IEEE 48-bit address
IEEE extended
IEEE registered
Changes to the world-wide names should be made by an administrator or individual who is completely
Caution
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 SAN-OS software release:
Both ELPs and EFPs use the VSAN WWN by default during link initialization. However, the ELP usage
changes based on the peer switch's usage:
•
•
Note As of Cisco SAN-OS Release 2.0(2b), the ELP is enhanced to be compliant with FC-SW-3.

Configuring a Secondary MAC Address

To allocate a secondary MAC address, follow these steps:
Step 1 Select a SAN (or a VSAN) from the Logical Domains pane.
You see a list of switches in the Information pane.
Expand Switches, expand FC Services and select WWN Manager in the Physical Attributes pane.
Step 2
In the Information pane, scroll until you see the switch on which you want to configure a secondary MAC
Step 3
address (see
OL-8007-10, Cisco MDS SAN-OS Release 3.x
68-1).
Standardized NAA WWN Formats
NAA Type
Type 1 = 0001b
Type 2 = 0010b
Type 5 = 0101b
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.
Figure 68-16).
WWN Format
000 0000 0000b
Locally assigned
IEEE company ID: 24 bits
Cisco MDS 9000 Family Fabric Manager Configuration Guide
Configuring World Wide Names
48-bit MAC address
48-bit MAC address
VSID: 36 bits
68-23