Dell PowerConnect Brocade 300 Fabric OS Administrator's Guide v7.1.0 - Page 494

19 Virtual Fabrics considerations for ICLs FIGURE 60 DCX-4S allowed ICL connections The following ICL connections are not allowed: • ICL0 ports to ICL0 ports • ICL1 ports to ICL1 ports ICL trunking on the Brocade DCX and DCX-4S ICL trunks form automatically but additional licenses may be required for enabling all ICL ports or for larger ICL configurations. For more information about ICL licensing options, refer to Chapter 18, "Administering Licensing". The ICLs are managed the same as ISL trunks. • On the Brocade DCX, each ICL is managed as two 8-port ISL trunks. • On the Brocade DCX-4S, each ICL is managed as one 8-port ISL trunk. Follow the guidelines in the specific hardware reference manuals for connecting the ICL cables. Virtual Fabrics considerations for ICLs In Virtual Fabrics, the ICL ports can be split across the logical switch, base switch, and default switch. The triangular topology requirement must be met for each fabric individually. The following restrictions apply: • ICL ports cannot be in a logical switch that is using XISLs. The "Allow XISL Use" attribute for the switch must be off. • All of the user ports in an ICL cable must be in the same logical switch. Distributing the user ports within the same cable across multiple logical switches is not supported. 494 Fabric OS Administrator's Guide 53-1002745-02