It appears that the CAM table allocates to 0, and without any CAM space allocated the monitoring feature is not enabled. You will need to modify the CAM table to include space for the session monitor.  Have a look at Page 556: [URL] 
Hello,  I have a S4820T and want to activate iSCSI optimisation. I enabled iSCSI, and a "sh iscsi" gives the following: iSCSI is enablediSCSI session monitoring is disablediSCSI COS : dot1p is 4 no-remarkSession aging time: 10Maximum number of connections is 256------------------------------------------------iSCSI Targets and TCP Ports:------------------------------------------------TCP Port    Target IP Address3260860  but if I try a "sh iscsi session" I get: % Error: iSCSI session monitoring is not enabled An looked for a while but cannot find how I enable the monitoring. Any hint is appreciated.Thx, Willi 
S4810T and iSCSI optimisation