HP StorageWorks 1606 Brocade Fabric OS Administrator's Guide v6.3.0 (53-100133 - Page 541

Backbone-to-edge routing with Virtual Fabrics, Upgrade and downgrade considerations for FC-FC routing

Page 541 highlights

Upgrade and downgrade considerations for FC-FC routing 21 Backbone-to-edge routing with Virtual Fabrics Since the base switch does not allow F_Ports, you cannot have devices connected to the base switch. Even though F_Ports are not allowed in the base switch, they are allowed in an FC router in legacy mode (Fabric OS v6.1.x or earlier, or Fabric OS v6.2.0 or later with Virtual Fabrics disabled). If you connect an FC router in legacy mode to the base switch, backbone-to-edge routing is supported on that FC router. In Figure 78, no devices can be connected to the backbone fabric (Fabric 8) because base switches cannot have F_Ports. Figure 80 shows an FC router in legacy mode connected to a base switch. This FC router can have devices connected to it, and so you can have backbone-to-edge routing through this FC router. In this figure, Host A in the backbone fabric can communicate with device B in the edge fabric with FID 20; Host A cannot communicate with device C, however, because the base switches do not support backbone-to-edge routing. Physical chassis 1 Physical chassis 2 IFL E Logical switch 1 E ISL E Logical switch 5 F B (Default logical switch) (Default logical switch) Fabric ID 128 Fabric ID 128 Logical switch 2 Fabric ID 1 Logical switch 6 Fabric ID 1 Edge fabric FID 20 Allows XISL use Allows XISL use C F Logical switch 3 E ISL E Logical switch 7 E Fabric ID 15 E Fabric ID 15 IFL IFL EX Logical switch 4 EX Logical switch 8 EX A (Base switch) Fabric ID 8 E XISL (Base switch) E Fabric ID 8 E E ISL FC router Fabric ID 4 FIGURE 80 Backbone-to-edge routing across base switch using FC router in legacy mode Upgrade and downgrade considerations for FC-FC routing When you upgrade to Fabric OS v6.3.0 or later, EX_Ports remain functional and you can continue to perform all FC router operations on the switch. Brocade recommends that you save your FC-FC routing configuration (using the configUpload command) before performing any downgrades. For further instructions on downgrading, refer to Chapter 9, "Installing and Maintaining Firmware". Fabric OS Administrator's Guide 499 53-1001336-01

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Fabric OS Administrator’s Guide
499
53-1001336-01
Upgrade and downgrade considerations for FC-FC routing
21
Backbone-to-edge routing with Virtual Fabrics
Since the base switch does not allow F_Ports, you cannot have devices connected to the base
switch.
Even though F_Ports are not allowed in the base switch, they are allowed in an FC router in legacy
mode (Fabric OS v6.1.x or earlier, or Fabric OS v6.2.0 or later with Virtual Fabrics disabled). If you
connect an FC router in legacy mode to the base switch, backbone-to-edge routing is supported on
that FC router.
In
Figure 78
, no devices can be connected to the backbone fabric (Fabric 8) because base
switches cannot have F_Ports.
Figure 80
shows an FC router in legacy mode connected to a base
switch. This FC router
can
have devices connected to it, and so you can have backbone-to-edge
routing through this FC router. In this figure, Host A in the backbone fabric can communicate with
device B in the edge fabric with FID 20; Host A cannot communicate with device C, however,
because the base switches do not support backbone-to-edge routing.
FIGURE 80
Backbone-to-edge routing across base switch using FC router in legacy mode
Upgrade and downgrade considerations for FC-FC routing
When you upgrade to Fabric OS v6.3.0 or later, EX_Ports remain functional and you can continue to
perform all FC router operations on the switch.
Brocade recommends that you save your FC-FC routing configuration (using the
configUpload
command) before performing any downgrades.
For further instructions on downgrading, refer to
Chapter 9, “Installing and Maintaining Firmware”
.
Logical switch 8
(Base switch)
Fabric ID 8
Logical switch 7
Fabric ID 15
Logical switch 6
Fabric ID 1
Allows XISL use
Logical switch 5
(Default logical switch)
Fabric ID 128
Physical chassis 2
Logical switch 4
(Base switch)
Fabric ID 8
E
Logical switch 3
Fabric ID 15
E
Logical switch 2
Fabric ID 1
Allows XISL use
E
Logical switch 1
(Default logical switch)
Fabric ID 128
E
Physical chassis 1
E
E
E
XISL
EX
EX
F
F
E
IFL
IFL
ISL
ISL
E
ISL
FC router
Fabric ID 4
E
EX
IFL
A
B
C
Edge fabric
FID 20
E