[c-nsp] show mac-address dynamic interface

[Ramcharan, Vijay A]

I am not sure whether this is normal behavior or not. I was looking into
a problem where a server appears to hang network connections to it at
about 15 minute idle intervals. I checked the usual suspects, speed,
duplex, port errors etc. No discrepancies there.  

The switch in question is a 6509E running 12.2(18)SXF7. The lone VLAN
962 SVI on the switch is in the same VLAN as the problem server. I can
ping the server without any issues. 
I did a show mac-address dynamic int g3/39 to see what the switch
records for this server. 

sw1#sh mac-addr dyn int g3/39
Displaying entries from Line card 3:

Legend: * - primary entry
        age - seconds since last seen
        n/a - not available

  vlan   mac address     type    learn     age              ports
------+----------------+--------+-----+----------+----------------------
----
[FE 1]:
*  962  001b.7845.dbf8   dynamic  Yes        280   Gi3/39
[FE 2]:
*  962  001b.7845.dbf8   dynamic  Yes        165   Gi3/39

sw1#


What is the meaning of [FE 1] and [FE 2] above? 
Would that be why are there two entries for the same MAC address on the
same port and VLAN? 
I did some more digging and found other hosts/port showing the same
behavior so it's not isolated to this one server. 
Could any of this be related to the server issue? 

Thanks. 
 
Vijay Ramcharan