McDATA ULTRANETTM EDGE STORAGE ROUTER 3000 Especificações descarregar pdf (Página 51)

C-1

Appendix C

Switch Considerations for FICON

This appendix describes fibre channel switch considerations for Edge 3000 FICON extension.

FICON Director (Switch) Considerations

There are 3 key things to consider when working in FICON configurations with switches.

• Whether or not an ISL is involved, and if so, ensuring that ISL paths are properly configured.

• What the Fibre Channel bb-credits value should be.

• What the Fibre Channel ports speeds should be set to.

FICON supported Switch Configurations

MCDATA Ultranet systems support the following configurations:

• Point-to-Point (direct attachment; no switches). The "Point-to-Point" topology refers to

configurations where the UltraNet Edge fibre channel interfaces are directly connected to host

and device interfaces (i.e. N_Port extension).

• Switched point-to-point (single switch). The "Switched Point-to-Point" topology encompasses

configurations that include a single switch (i.e. F_Port extension) on only one side of the

WA N .

• Cascaded Director (Switch) ISL (two switches). The Cascaded Directors topology includes

two switches, and only two switches, with one switch on both sides of the WAN. In this case

the UltraNet systems are used to extend the ISL (i.e. E_Port extension) between the two

switches. The Cascaded Director topology is used to extend MVS host to device cascaded

configurations as well as device to device configurations such as IBM VTS and Sun VTSS

peer to peer configurations .

The Cascade Switching topology, which involves 3 or more switches, is not supported.

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McDATA ULTRANETTM EDGE STORAGE ROUTER 3000 Especificações Página 51