From the following KB: [URL]  NOTE Aggregated links on an Isilon cluster are passive, meaning that network traffic can flow across the links set even if the Cisco switch is not yet configured for LACP. After LACP is configured on the switch, NIC aggregation is enabled on the Isilon cluster. To minimize link interruption, Isilon recommends configuring the Isilon cluster before configuring the switch.
Hello,  I have a question.  What is LACP negotiation mode of Isilon?  active mode or passive mode?  Best Regards, 
What is LACP negotiation mode of Isilon?