check the output of the command: "show interface flowcontrol" ....
the value in your maxIndex will match your RxPause counter on the interface.
this indicates that you are receiving flowcontrol pause frames from the device attached to the interface.
it means that the device attached to the interface cannot buffer anymore data (the interface it is trying to use to transmit the data may be slower link speed than the interface connected to your switch).
here is an example from my switch:
#sh int gi5/1 flowcontrol
Port Send FlowControl Receive FlowControl RxPause TxPause
admin oper admin oper
----- -------- -------- -------- -------- ------- -------
Gi5/1 desired on desired on 568102 0
#sh counter int gi5/1 | in maxIndex
106. maxIndex = 568102
Hope this helps. Thanks!
-Louie