Hyperv FailoverCluster hearbeat network problem

Hi all! I have a Hyper-v 2012 R2 failover cluster with 9 nodes, 5 nodes by Fujitsu BX600 and 4 nodes Fujitsu BX400. On everyone node i created 2 nic team of 2 interface. One NIC Team for Client Network, another for Heartbeat Network (ipv6 linklocal). This nic teams connect to blade switch.

All VMs, Live Migration work fine, but on nodes blade BX400 Heartbeat network connection is failed. In event i see event id 1127