504 Fabric OS Administrator’s Guide
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Upgrade and downgrade considerations for FC-FC routing
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FIGURE 82 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 v7.0.0 or later, EX_Ports remain functional and you can continue to
perform all FC router operations on the switch.
If EX_Ports are present on the FR4-18i blade, upgrade to Fabric OS v7.0.0 or later is prevented.
EX_Ports are not supported on the FR4-18i blade in Fabric OS v7.0.0 or later. VEX_Ports continue to
be supported on this blade, however.
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”.
How replacing port blades affects EX_Port configuration
If you replace an FR4-18i blade with an 8-Gbps port blade or FX8-24 blade, the EX_Port
configuration remains the same for the first 16 ports on the 8-Gbps port blade (and for the first 12
FC ports on the FX8-24 blade). For all other ports on the blade, the EX_Port configuration is
cleared. No ports are persistently disabled.
If you replace an 8-Gbps port blade or FX8-24 blade with an FR4-18i blade, the EX_Port
configuration remains the same for all ports on the FR4-18i blade. All ports are persistently
disabled.
If you replace an 8-Gbps port blade with an FX8-24 blade, the EX_Port configuration remains the
same for the first 12 FC ports on the FX8-24 blade.
If you replace an 8-Gbps port blade or FX8-24 blade with another 8-Gbps port blade, the EX_Port
configuration remains the same.
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
Legacy FC router
Fabric ID 8
E
EX
IFL
A
B
C
Edge fabric
FID 20
E