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Figure 3-11
Fabric Topology
Limits
D
D
3
N
N
F
D
N
F
2
N
F
D
1
S
E
1
ISL
E
F
N
D
12
Example Multiswitch Fabric
A multiswitch fabric is typically complex and provides the facilities
to maintain routing to all device N_Ports attached to the fabric,
handle flow control, and satisfy the requirements of the classes of
Fibre Channel service that are supported.
Operation of multiple directors or switches in a fabric topology is
subject to the following topology limits. Consider the impact of these
limits when planning the fabric.
•
Fabric Elements - Each fabric element is defined by a unique
domain identification (Domain_ID) that ranges between 1 and 31.
A Domain_ID of 0 is invalid. Therefore, the theoretical limit of
interconnected directors or switches supported in a single fabric
is 31. For additional information, refer to
Considerations.
Planning Considerations for Fibre Channel Topologies
Planning Considerations for Fibre Channel Topologies
4
F
ISL
S
E
E
E
E
E
E
E
E
E
ISL
E
S
F
3
N
ISL = Interswitch Link
D
11
D
D
D
5
6
7
N
N
N
F
F
F
D
F
N
D
F
N
F
N
D
Di
2
S
2
Multiswitch
Fabric
D = Device
S = Fabric Switch (Director)
General Fabric Design
3
8
9
10
3-19
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