Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual page 565

Chapter 25 Configuring Domain Parameters
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
If you do not configure a domain ID, the local switch sends a random ID in its request. We recommend
that you use static domain IDs.
When a subordinate switch requests a domain, the following process takes place (see
The local switch sends a configured domain ID request to the principal switch.
1.
The principal switch assigns the requested domain ID if available. Otherwise, it assigns another
2.
available domain ID.
Figure 25-7
The behavior for a subordinate switch changes based on three factors:
The allowed domain ID lists.
•
The configured domain ID.
•
The domain ID that the principal switch has assigned to the requesting switch.
•
In specific situations, the changes are as follows:
• When the received domain ID is not within the allowed list, the requested domain ID becomes the
runtime domain ID and all interfaces on that VSAN are isolated.
When the assigned and requested domain IDs are the same, the preferred and static options are not
•
relevant, and the assigned domain ID becomes the runtime domain ID.
When the assigned and requested domain IDs are different, the following cases apply:
•
OL-17256-03, Cisco MDS NX-OS Release 4.x
Configuration Process Using the preferred Option
Switch 7 (subordinate)
Local WWN
20:02:ab:ba:cd:dc:f4:00
Configured domain ID
7 preferred
Runtime domain ID = 7
Configured priority = 128
Runtime priority = 128
Runtime fabric name
20:01:ab:ba:cd:cd:dc:f4
Local WWN
20:03:ab:ba:cd:dc:f4:00
Configured domain ID
7 preferred
Runtime domain ID = 51
Configured priority = 128
Runtime priority = 128
Runtime fabric name
20:01:ab:ba:cd:cd:dc:f4
Switch 7 (subordinate)
If the configured type is static, the assigned domain ID is discarded, all local interfaces are
–
isolated, and the local switch assigns itself the configured domain ID, which becomes the
runtime domain ID.
1. Request configured
domain ID (7).
2. Requested domain
ID assigned,
if available (7).
3. Otherwise, another
available domain
ID assigned (51).
Cisco MDS 9000 Family Fabric Manager Configuration Guide
Switch 2 (principal)
Local WWN
20:01:ab:ba:cd:dc:f4:00
Configured domain ID
0 (zero) preferred
Runtime domain ID = 3
Configured priority = 128
Runtime priority = 2
Runtime fabric name
20:01:ab:ba:cd:cd:dc:f4
Local WWN
20:04:ab:ba:cd:dc:f4:00
Configured domain ID
0 (zero) preferred
Runtime domain ID = 3
Configured priority = 128
Runtime priority = 2
Runtime fabric name
20:01:ab:ba:cd:cd:dc:f4
Switch 2 (principal)
Domain IDs
Figure 25-7):
25-9