Reference Guide

Figure 22 shows a logical representation of the physical chassis and devices in Figure 21. As shown in Figure 22, the devices are
isolated into separate fabrics.
FIGURE 22 Logical switches in a single chassis belong to separate fabrics
Management model for logical switches
The operations you can perform on a logical switch depend on the context you are in. Some operations affect only a single logical switch,
and some operations affect the entire physical chassis.
All user operations are classified into one of the following:
∙ Chassis management operations
These are operations that span logical switch boundaries, such as:
– Logical switch configuration (creating, deleting, or modifying logical switches)
– Account management (determining which accounts can access which logical switches)
– Field-replaceable unit (FRU) management (slot commands, such as slotShow )
– Firmware management (firmware upgrade, HA failover)
∙ Logical switch operations
These are operations that are limited to the logical switch, such as displaying or changing port states. Logical switch operations
include all operations that are not covered in the chassis management operations.
When you log in, you are assigned an active context, or active logical switch. This context filters the view that you get, and determines
which ports you can see. You can change the active context. For example, if you are working with logical switch 1, you can change the
context to logical switch 5. When you change the context to logical switch 5, you only see the ports that are assigned to that logical
switch. You do not see any of the other ports in the chassis.
The scope of logical switch operations is defined by the active context. When you are in the context of a logical switch, you can perform
port, switch, and fabric-level operations, subject to Role-Based Access Control (RBAC) rules.
If you have permission to execute chassis-level commands, you can do so, regardless of which logical switch context you are in.
Managing Virtual Fabrics
Brocade Fabric OS Administration Guide, 8.0.1
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