Technical data

C-2 Fabric OS Administrator’s Guide
Publication Number: 53-0000518-09
Using Remote Switch
C
Remote Switch can be used for these types of gateway devices:
• Fibre Channel over ATM
• Fibre Channel over IP
• Fibre Channel over SONET
• Fibre Channel over DWDM
Most of these gateway devices have enough buffers to cover data transfer over a wide area
network (WAN). The SilkWorm switches on each side of the gateway must have identical
configurations. Only qualified SFPs should be used.
You must connect the fabrics through the gateway device, and make sure that the configure parameters
are compatible with the gateway device.
You might be required to reconfigure the following parameters, depending on the gateway
requirements:
• R_A_TOV: Specify a Resource Allocation Timeout Value compatible with your gateway device.
• E_D_TOV: Specify a Error Detect Timeout Value compatible with your gateway device
• Data field size: Specify the maximum Fibre Channel data field reported by the fabric. Verify the
maximum data field size the network-bridge can handle. Some bridges might not be able to handle
a maximum data field size of 2112.
• BB credit: Specify the number of Buffer-to-Buffer credits for Nx_port devices.
• Suppress Class F Traffic: Use this parameter to disable class F traffic. Some network-bridge
devices might not have a provision for handling class F frames. In this case, the transmission of
class F frames must be suppressed throughout the entire Remote Switch fabric.
To set the access and reconfigure these parameters:
1. Connect to the switch and log in as admin.
2. Enter the switchDisable command to disable the switch.
3. Enter the configure command.
4. At the Fabric Parameters prompt enter yes.
5. Press Enter to scroll through the Fabric Parameters without changing their values, until you
reach the parameter you want to modify.
6. Specify a new parameter value that is compatible with your gateway device.
7. Press Enter to scroll through the remainder of the configuration parameters. Make sure that the
configuration changes are committed to the switch.
8. Repeat for all switches in the fabrics to be connected through a gateway device. These parameters
must be identical on each switch in the fabric, and between fabrics connected through the
gateway device.
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Consult your gateway vendor for supported and qualified configurations.