Dell PowerConnect Brocade 300 Fabric OS Administrator's Guide v7.1.0 - Page 493

ICLs for the Brocade DCX Backbone family 19 NOTE Brocade recommends that you have a maximum of eight ICLs connected to the same neighboring domain, with a maximum of four ICLs from each core blade. • The ICLs can connect to either core blade in the neighboring chassis. Unlike the copper ICLs, the QSFP ICLs do not need to be cross-connected. • The 100-meter ICL is supported, beginning in Fabric OS 7.1.0, when using 100-meter-capable QSFPs over OM4 cable only. NOTE QSFP ICLs and ISLs in the same switch and connected to the same neighboring switch are not supported. This is a topology restriction with 16 Gbps ICLs and any ISLs that are E_Ports or VE_Ports. ICL trunking on the Brocade DCX 8510-8 and DCX 8510-4 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". Each Quad Small Form-Factor Pluggable (QSFP) cable has four ports, each terminating on a different application-specific integrated circuit (ASIC). These ports cannot form a trunk with each other, but can form trunks only with corresponding ports on another QSFP. To establish ICL trunking between platforms in the Brocade DCX 8510 Backbone family, follow these configuration rules: • The QSFP cables must be in the same trunk group, as illustrated in Figure 59. • Refer to the specific hardware reference manuals for information about port numbering and connecting the ICL cables. ICLs for the Brocade DCX Backbone family The Brocade DCX has two ICL connectors at ports ICL0 and ICL1 on each core blade, each aggregating a set of 16 ports. Thus, each core blade provides 32 ICL ports and there are 64 ICL ports available for the entire Brocade DCX chassis. All the ICL connector ports must be connected to the same two Brocade DCX or DCX-4S chassis. The Brocade DCX-4S has two ICL connector ports at ICL0 and ICL1, each aggregating a set of 8 ports. Thus, each core blade provides 16 ICL ports and there are 32 ICL ports available for the entire Brocade DCX-4S chassis. All the ICL connector ports must be connected to the same two Brocade DCX or DCX-4S chassis. Only the following cross-ICL group connections are allowed, as illustrated in Figure 60: • ICL0 ports on the first chassis connect to ICL1 ports on the second chassis. • ICL1 ports on the first chassis connect to ICL0 ports on the second chassis. Fabric OS Administrator's Guide 493 53-1002745-02