Specifications

Attaching to a FICON channel

This section tells you how to configure the ESS for a FICON attachment.

Configuring the ESS for FICON attachment

You can perform a FICON channel attachment on the ESS Models F10 and F20.

You cannot perform a FICON channel attachment on the ESS Models E10 and E20.

When you attach a Model F10 or F20 to a FICON interface, you must use one of

the following host adapter feature codes:

v 3021

Feature code 3021 is a longwave laser adapter that has a 31-m (100-ft) 9-micron

cable with duplex connectors.

Because the 3021 uses one of four slots in one of the four I/O bays, you can

have a maximum of 16 adapters in the ESS. This allows you to have a maximum

of 16 FICON interface attachments.

v 3023

Feature code 3023 is the shortwave laser adapter that includes a 31-m (100 ft),

(50-micron) cable with duplex connectors.

Note: You cannot mix FICON and fibre-channel protocol (SCSI) connections on

the same ESS adapter.

Because the 3023 uses one of four slots in one of the four I/O bays, you can

have a maximum of 16 adapters in the ESS. This allows you to have a maximum

of 16 FICON interface attachments. If the attachments are all point-to-point, you

can attach directly to 16 FICON channels. If you attach to a switch or director,

you can attach a maximum of 128 FICON channels per ESS FICON adapter. For

this scenario, you must be able to attach to a number of hosts. The ESS

S/390 Host

or zSeries Host

ESS

Figure 45. Example of the configuration after the FICON bridge is removed

78 ESS Host Systems Attachment Guide