Hi,We are using two stacked ICX6610 switches and have several servers and storage connected to it. We have observed problems on our 10G ports – on server site (vmware esx hosts) we see constant link down/up events, and on storage ports we have CRC errors and port flapping condition. No errors are found on 1Gb ports, no flapping, no CRC, no link state changes.Sometimes we even get to APD event on vmware (we use 10G for NFS connection hosts<->storage).FastIron version used is 08.0.10g.Brief description (excluding 1G network connections):3 ESX hosts named host1, host2, host3 are connected to 10G ports.host1 – ports 1/3/3 and 2/3/3host2 – ports 1/3/4 and 2/3/4host3 – ports 1/3/5 and 2/3/5No teaming on hosts side – only virtual port based load balancing on virtual switches.Backup server is connected to ports 1/3/6 and 2/3/6. Here we use NIC teaming at server side (static link aggregateion) and switch side – LAG.Storage is connected to ports 1/3/1 & 2/3/1 and uses LAG.From one stack member there is only one active uplink to rest of network – port 1/1/24.I have copy-pasted our switch config below including port descriptions. Does anybody see some error in configuration?ICX6610-S-1>show configuration!Startup-config data location is flash memory!Startup configuration:!ver 08.0.10gT7f1!stack unit 1 module 1 icx6610-24-port-management-module module 2 icx6610-qsfp-10-port-160g-module module 3 icx6610-8-port-10g-dual-mode-module stack-trunk 1/2/1 to 1/2/2 stack-trunk 1/2/6 to 1/2/7 stack-port 1/2/1 1/2/6stack unit 2 module 1 icx6610-24-port-management-module module 2 icx6610-qsfp-10-port-160g-module module 3 icx6610-8-port-10g-dual-mode-module stack-trunk 2/2/1 to 2/2/2 stack-trunk 2/2/6 to 2/2/7 stack-port 2/2/1 2/2/6stack enablestack mac 609c.9f47.ee38!!!lag “storage2_10g_ports” static id 6 ports ethernet 1/3/2 ethernet 2/3/2 primary-port 1/3/2 deploy!lag “storage1_10g_ports” static id 2 ports ethernet 1/3/1 ethernet 2/3/1 primary-port 1/3/1 deploy!lag “BackupServer_10g_ports” static id 1 ports ethernet 1/3/6 ethernet 2/3/6 primary-port 1/3/6 deploy!!vlan 1 name DEFAULT-VLAN by port!vlan 6 by port tagged ethe 1/1/4 to 1/1/9 ethe 1/1/24 ethe 2/1/4 to 2/1/9!vlan 7 by port tagged ethe 1/1/4 to 1/1/9 ethe 1/1/24 ethe 2/1/4 to 2/1/9 untagged ethe 1/1/19 to 1/1/20 ethe 2/1/19 to 2/1/20!vlan 110 name ManagementNetwork by port tagged ethe 1/1/4 to 1/1/9 ethe 1/1/24 ethe 2/1/4 to 2/1/9 untagged ethe 1/1/1 to 1/1/3 ethe 1/1/10 to 1/1/12 ethe 2/1/1 to 2/1/3 ethe 2/1/10!vlan 111 name ServersNetwork by port tagged ethe 1/1/4 to 1/1/9 ethe 1/1/24 ethe 2/1/4 to 2/1/9 untagged ethe 1/1/13 ethe 2/1/11 to 2/1/13!vlan 112 name StorageNetwork by port tagged ethe 1/3/1 to 1/3/5 ethe 2/3/1 to 2/3/5 untagged ethe 1/3/6 ethe 2/3/6!vlan 113 name vMotionNetwork by port tagged ethe 1/3/3 to 1/3/5 ethe 2/3/3 to 2/3/5!vlan 155 name Servers2network by port tagged ethe 1/1/4 to 1/1/9 ethe 1/1/24 ethe 2/1/4 to 2/1/9!!!!aaa authentication web-server default localaaa authentication enable default localaaa authentication login default localjumboenable super-user-password …..enable aaa consolehostname ICX6610-S-1ip address xxx.xxx.xxx.xxx 255.255.255.0no ip dhcp-client enableip default-gateway xxx.xxx.xxx.xxx!logging host xxx.xxx.xxx.xlogging persistenceno telnet servertelnet server enable vlan 111username admin password …..cdp run!!clock summer-timeclock timezone gmt GMT+01!!ntp server x.x.x.x minpoll 5 burst!!web-management httpshitless-failover enableinterface ethernet 1/1/4 port-name host01 slot2 port0 vmnic6!interface ethernet 1/1/5 port-name host01 slot3 port0 vmnic8!interface ethernet 1/1/6 port-name host02 slot2 port0 vmnic6 spanning-tree 802-1w admin-edge-port!interface ethernet 1/1/7 port-name host02 slot3 port0 vmnic8 spanning-tree 802-1w admin-edge-port!interface ethernet 1/1/8 port-name host03 slot2 port0 vmnic6 spanning-tree 802-1w admin-edge-port!interface ethernet 1/1/9 port-name host03 slot3 port0 vmnic8 spanning-tree 802-1w admin-edge-port!interface ethernet 1/1/11 spanning-tree 802-1w admin-edge-port!interface ethernet 1/1/22 port-name “VLAN 110 uplink to cisco port X – disconnected cable”!interface ethernet 1/1/23 port-name “VLAN 111 uplink to cisco port X – disconnected cable”!interface ethernet 1/1/24 port-name “Uplink port to central Cisco”!interface ethernet 1/3/1 speed-duplex 10G-full!interface ethernet 1/3/2 speed-duplex 10G-full spanning-tree 802-1w admin-edge-port!interface ethernet 1/3/3 port-name saphost01 slot0 port0 vmnic2 speed-duplex 10G-full!interface ethernet 1/3/4 port-name host02 slot0 port0 vmnic2 speed-duplex 10G-full spanning-tree 802-1w admin-edge-port!interface ethernet 1/3/5 port-name host03 slot0 port0 vmnic2 speed-duplex 10G-full spanning-tree 802-1w admin-edge-port!interface ethernet 1/3/6 speed-duplex 10G-full spanning-tree 802-1w admin-edge-port!interface ethernet 1/3/7 speed-duplex 10G-full!interface ethernet 1/3/8 speed-duplex 10G-full!interface ethernet 2/1/4 port-name host01 slot2 port1 vmnic7!interface ethernet 2/1/5 port-name host01 slot3 port1 vmnic9!interface ethernet 2/1/6 port-name host02 slot2 port 1 vmnic7 spanning-tree 802-1w admin-edge-port!interface ethernet 2/1/7 port-name host02 slot3 port1 vmnic9 spanning-tree 802-1w admin-edge-port!interface ethernet 2/1/8 port-name host03 slot2 port1 vmnic7 spanning-tree 802-1w admin-edge-port!interface ethernet 2/1/9 port-name host03 slot3 port1 vmnic9 spanning-tree 802-1w admin-edge-port!interface ethernet 2/3/3 port-name host01 slot1 port1 vmnic5 speed-duplex 10G-full!interface ethernet 2/3/4 port-name host02 slot1 port1 vmnic5 speed-duplex 10G-full spanning-tree 802-1w admin-edge-port!interface ethernet 2/3/5 port-name host03 slot1 port1 vmnic5 speed-duplex 10G-full spanning-tree 802-1w admin-edge-port!!!!lldp run!!!!endICX6610-S-1>