5
Physical Planning Considerations
5-37
Physical Planning Considerations
• Switch binding - This portion of the feature allows only specified
devices and fabric elements to connect to specified director or
fabric switch ports.
• Enterprise Fabric Mode - Although Enterprise Fabric Mode is not a
keyed feature, it is required for SANtegrity Binding operation.
Enterprise Fabric Mode also enables the following parameters:
—Rerouting delay.
—Domain RSCNs.
— Insistent Domain_ID.
For additional information about the feature, refer to SANtegrity
Binding.
OpenTrunking
OpenTrunking is a feature that optimizes ISL bandwidth use in a
fabric environment. The feature monitors Fibre Channel data rates
(congestion and BB_Credit starvation) through multiple ISLs,
dynamically applies a Dijkstra FSPF networking algorithm to
calculate the optimum path between fabric elements, and load
balances Fibre Channel traffic (from congested links to uncongested
links) accordingly. OpenTrunking is shown in Figure 5-8.
Figure 5-8 OpenTrunking
Server 1
ISL 1
Storage 1
Server 2
Server 3
T
M
ISL 2
Storage 2
Director A Director B
T
M
Trunk
ISL 1
ISL 2
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