Chapter 18
Configuring Inter-VSAN Routing
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 .
Database Merge Guidelines
A database merge refers to a union of the configuration database and static (unlearned) entries in the
active database. Refer to the
•
Figure 18-4
Fabric Merge Consequences
Fabrics with
dissimilar zones
Fabric X
Cisco MDS switch
Cisco MDS switch
ivzs1
ivz1
wwn1
wwn2
•
•
OL-6973-03, Cisco MDS SAN-OS Release 2.x
"CFS Merge Support" section on page 5-7
Be aware of the following conditions when merging two IVR fabrics:
The IVR configurations are merged even if two fabrics contain different configurations.
–
If dissimilar zones exist in two merged fabrics, the zone from each fabric is cloned in the
–
distributed zone set with appropriate names (see
Fabric Y
Cisco MDS switch
ivzs1
ivz1
wwn3
wwn4
You can configure different IVR configurations in different Cisco MDS switches.
Be aware that the merge follows more liberal approach in order to avoid traffic disruption. After the
merge, the configuration will be a union of the configurations that were present on the two switches
involved in the merge.
The configurations are merged even if both fabrics have different configurations.
–
A union of zones and zone sets are used to get the merged zones and zone sets. If a dissimilar
–
zone exists in two fabrics, the dissimilar zones are cloned into the zone set with appropriate
names so both zones are present.
The merged topology contains a union of the topology entries for both fabrics.
–
The merge will fail if the merged database contains more topology entries than the allowed
–
maximum.
The total number of VSANs across the two fabrics cannot exceed 64. As of Cisco MDS
–
SAN-OS Release 2.1(1a), the total number of VSANs across the two fabrics cannot exceed 128.
Figure
Both zones contained
in the zone set
Fabric XY
Cisco MDS switch
Cisco MDS switch
Cisco MDS switch
ISL
ivzs1
ivzs1
ivz1
wwn1
wwn2
ivz1 wwnC
wwn3
wwn4
Cisco MDS 9000 Family Configuration Guide
Database Merge Guidelines
for detailed concepts.
18-4).
witch
ivz1
wwn1
wwn2
ivz1 wwnC
wwn3
wwn4
18-29