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Chapter 25
Advanced Features and Concepts
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 .
When merging two fabrics, follow these guidelines:
•
•
The number of pending fctimer configuration operations cannot be more than 15. At that point, you must
Note
commit or abort the pending configurations before performing any more operations.
Displaying Configured FC Timer Values
Use the show fctimer command to display the configured FC timer values (see Examples
Example 25-1 Displays Configured Global TOVs
switch# show fctimer
F_S_TOV
----------------------------------------
5000 ms
The F_S_TOV constant, though not configured, is displayed in the output of the show fctimer command.
Note
Example 25-2 Displays Configured TOVs for a Specified VSAN
switch# show fctimer vsan 10
vsan no.
-------------------------------------------------
10
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
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Be aware of the following merge conditions:
The merge protocol is not implemented for distribution of the fctimer values—you must
–
manually merge the fctimer values when a fabric is merged.The per-VSAN fctimer
configuration is distributed in the physical fabric.
The fctimer configuration is only applied to those switches containing the VSAN with a
–
modified fctimer value.
The global fctimer values are not distributed.
–
Do not configure global timer values when distribution is enabled.
D_S_TOV
E_D_TOV
5000 ms
2000 ms
F_S_TOV
D_S_TOV
5000 ms
5000 ms
25-1).
R_A_TOV
10000 ms
E_D_TOV
R_A_TOV
3000 ms
10000 ms
Cisco MDS 9000 Family Configuration Guide
Configuring World Wide Names
25-1
and 25-2).
25-5
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