HP StorageWorks 1606 Brocade Fabric OS Administrator's Guide v6.3.0 (53-100133 - Page 338

Interoperability support for logical switches, Switch configurations for interoperability

Page 338 highlights

14 Interoperability support for logical switches Interoperability support for logical switches Interoperability for logical switches is supported on the Brocade 5100 and 5300 switches, and the Brocade DCX and DCX-4S platforms. You can configure logical switches individually to operate in any of the interoperable modes. This means that McDATA Fabric mode, McDATA Open Fabric mode, and Brocade Native mode are supported in the same chassis. Although there is always at least one logical switch instance per chassis, multiple logical switch instances can exist in a chassis. In a Virtual Fabric, the logical switch used to communicate among different logical switches is called the base switch and it must be in Brocade Native mode. If you set a logical switch to interopmode 2 or interopmode 3, it cannot use the logical links between two logical switches if they were connected using extended ISLs that were formed as part of the base fabric. All logical switch-to-logical switch or Layer 2 switch connections must be through ISLs or dedicated ISLs for switches in interopmode 2 or interopmode 3. You can change the interopmode of a logical switch after it is created; it takes effect immediately without having to reboot the system. All switches participating in a standard or logical fabric must be set to the same interopmode in order to merge the fabric. For more information on Virtual Fabrics, see "Managing Virtual Fabrics" on page 195. NOTE A dedicated ISL is a connection between two logical switches or other Layer 2 switches using E_Port connections. Switch configurations for interoperability You can enter the interopMode command with the appropriate parameter to change the mode of the switch to McDATA Fabric, McDATA Open Fabric, and Brocade Native modes. In v6.0.0 or later, when McDATA Fabric interoperability mode is turned on, the OUI portion of the switch WWN is no longer replaced with a McDATA OUI. The Brocade OUI is used. However, upgrading from Fabric OS 5.2.1_NI to Fabric OS v6.0.0 or later will be non-disruptive, preserving the McDATA OUI and the given interopMode. Unless the switch is taken offline, and the interopMode is changed, or the OUI is changed with the configure command, the McDATA OUI is preserved. The following restrictions apply when changing from Brocade Native (IM0) to McDATA Fabric (IM2) or McDATA Open Fabric Mode (IM3): • Existing zone configurations, defined and effective, are erased. The switch assumes the zone configuration from the fabric it joins, unless you create a new configuration. • If you do not specify a Domain ID offset, the Domain ID default mode is used (offset 0x60). The following restrictions apply when changing from McDATA Fabric (IM2) or McDATA Open Fabric Mode (IM3) to Brocade Native Mode (IM0): • Existing zone configurations, defined and effective, are erased. The switch assumes the zone configuration from the fabric it joins, unless you create a new configuration. ATTENTION When interoperability mode is disabled, all configuration parameters return to their default states and can be modified using the configure command. 296 Fabric OS Administrator's Guide 53-1001336-01

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296
Fabric OS Administrator’s Guide
53-1001336-01
Interoperability support for logical switches
14
Interoperability support for logical switches
Interoperability for logical switches is supported on the Brocade 5100 and 5300 switches, and the
Brocade DCX and DCX-4S platforms. You can configure logical switches individually to operate in
any of the interoperable modes. This means that McDATA Fabric mode, McDATA Open Fabric
mode, and Brocade Native mode are supported in the same chassis. Although there is always at
least one logical switch instance per chassis, multiple logical switch instances can exist in a
chassis.
In a Virtual Fabric, the logical switch used to communicate among different logical switches is
called the base switch and it must be in Brocade Native mode. If you set a logical switch to
interopmode 2 or interopmode 3, it cannot use the logical links between two logical switches if they
were connected using extended ISLs that were formed as part of the base fabric.
All logical switch-to-logical switch or Layer 2 switch connections must be through ISLs or dedicated
ISLs for switches in interopmode 2 or interopmode 3. You can change the interopmode of a logical
switch after it is created; it takes effect immediately without having to reboot the system.
All switches participating in a standard or logical fabric must be set to the same interopmode in
order to merge the fabric. For more information on Virtual Fabrics, see
“Managing Virtual Fabrics”
on page 195.
NOTE
A dedicated ISL is a connection between two logical switches or other Layer 2 switches using E_Port
connections.
Switch configurations for interoperability
You can enter the
interopMode
command with the appropriate parameter to change the mode of
the switch to McDATA Fabric, McDATA Open Fabric, and Brocade Native modes
.
In v6.0.0 or later,
when McDATA Fabric interoperability mode is turned on, the OUI portion of the switch WWN is no
longer replaced with a McDATA OUI. The Brocade OUI is used. However, upgrading from Fabric OS
5.2.1_NI to Fabric OS v6.0.0 or later will be non-disruptive, preserving the McDATA OUI and the
given interopMode. Unless the switch is taken offline, and the interopMode is changed, or the OUI
is changed with the
configure
command, the McDATA OUI is preserved.
The following restrictions apply when changing from Brocade Native (IM0) to McDATA Fabric (IM2)
or McDATA Open Fabric Mode (IM3):
Existing zone configurations, defined and effective, are erased. The switch assumes the zone
configuration from the fabric it joins, unless you create a new configuration.
If you do not specify a Domain ID offset, the Domain ID default mode is used (offset 0x60).
The following restrictions apply when changing from McDATA Fabric (IM2) or McDATA Open Fabric
Mode (IM3) to Brocade Native Mode (IM0):
Existing zone configurations, defined and effective, are erased. The switch assumes the zone
configuration from the fabric it joins, unless you create a new configuration.
ATTENTION
When interoperability mode is disabled, all configuration parameters return to their default states
and can be modified using the
configure
command.