[c-nsp] FWSM Dropped packets

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Guys

just found something puzzling on my inside interface ....(the FWSM is behind
the MSFC ...inside interface is shared with the MSFC) and i noticed a lot of
drooped packets on the input interface and its increasing by the
millisecond  is this normal ?

please i need your inputs on this

regards

FWSM# clear inter
FWSM# sh inter inside

Interface Vlan699 "inside", is up, line protocol is up
  Hardware is EtherSVI
        Description: INSIDE_Connection_to_MSFC
        MAC address 001d.4584.0500, MTU 1500
        IP address 10.122.199.1, subnet mask 255.255.255.224
  Traffic Statistics for "inside":
        27 packets input, 2034 bytes
        0 packets output, 0 bytes
        22 packets dropped

FWSM# sh inter inside
Interface Vlan699 "inside", is up, line protocol is up
  Hardware is EtherSVI
        Description: INSIDE_Connection_to_MSFC
        MAC address 001d.4584.0500, MTU 1500
        IP address 10.122.199.1, subnet mask 255.255.255.224
  Traffic Statistics for "inside":
        47 packets input, 3326 bytes
        1 packets output, 130 bytes
        37 packets dropped

FWSM# sh inter inside
Interface Vlan699 "inside", is up, line protocol is up
  Hardware is EtherSVI
        Description: INSIDE_Connection_to_MSFC
        MAC address 001d.4584.0500, MTU 1500
        IP address 10.122.199.1, subnet mask 255.255.255.224
  Traffic Statistics for "inside":
        59 packets input, 4118 bytes
        1 packets output, 130 bytes
        48 packets dropped
FWSM#
-- 
Hash!!!
CCIE#16818