304 Fabric OS Administrator’s Guide
53-1001763-02
Switch configurations for interoperability
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1. Verify that you have implemented all the Brocade prerequisites necessary to enable
interopMode 3 on the fabric (see “McDATA Open Fabric mode configuration restrictions” on
page 302.)
2. Connect to the switch and log in using an account assigned to the admin role.
3. Enter the switchDisable command.
switch:admin> switchdisable
4. Enter the configure command to set the domain ID to a number in the range from 97 to 127;
otherwise, the interopMode command defaults to 97. (For detailed instructions, see Chapter 2,
“Performing Basic Configuration Tasks.)
switch:admin> configure
Configure...
Fabric Parameters (yes, y, no, n): [no] y
Domain (1...239): [1] 97
5. Enter the interopMode 3 command to enable interoperability. This command resets a number
of parameters and enables McDATA Open Fabric mode.
switch:admin> interopmode 3
The switch effective and defined configuration
will be lost if interop Mode is changed.
Interop Mode or Domain Offset Will Be Changed
and switch will be Enabled
Do you want to continue? (yes, y, no, n): [no] y
6. Repeat step 2 through step 5 on each Fabric OS switch in the fabric.
7. After enabling McDATA Open Fabric mode on all switches, physically connect the legacy M-EOS
switches to the Fabric OS fabric, one at a time.

Enabling McDATA Fabric mode

When McDATA Fabric mode is enabled, the OUI portion of the switch WWN is no longer replaced
with a McDATA OUI. All existing zoning configurations are cleared.
1. Verify that you have implemented all the Brocade prerequisites necessary to enable
interopMode 2 on the fabric (see “McDATA Fabric mode configuration restrictions” on
page 301.)
2. Connect to the switch and log in using an account assigned to the admin role.
3. Enter the switchDisable command.
switch:admin> switchdisable
4. Enter the configure command to set the domain ID to a number in the range from 1-31. (For
detailed instructions, see Chapter 2, “Performing Basic Configuration Tasks”.)
switch:admin> configure
Configure...
Fabric Parameters (yes, y, no, n): [no] y
Domain (1...31): [1] 5
5. Enter the interopMode 2 command to enable interoperability. This command resets a number
of parameters and enables fabric mode.
B5000_205:admin> interopmode 2