Session count reduced due to unreachable host NICs

Dear,

I mount  an EqualLogic PS6100 on a RHEL 6 server. Using ehcmcli status I note that there is a continue iSCSI reconfiguration that ends with the following warning:

Status: WARNING: Session count reduced due to unreachable host NICs
Resolution: Ensure the PS Series array can reach all host NICs designated for MPIO

I'm able to ping the EqualLOgin IPs and from EqualLogic  the server IPs.

How can I solve the problem?

Thanks