While we where deploying network change and moving access ports to another VLAN some ports seems to be stuck after VLAN change. The port status is UP and link auto negotiation is successful, since the host and the switch reports 1000 speed full duplex.

#show interfaces configuration  gi1/0/10

Port      Description                    Duplex Speed   Neg  MTU   Admin
                                                                   State
--------- ------------------------------ ------ ------- ---- ----- -----
Gi1/0/10  xxxxxxxxxx                     Full   1000    Auto 1518  Up

interface show status:

#show interfaces status gi1/0/10        

Port      Description     Duplex Speed   Neg  Link   Flow  M  VLAN
                                              State  Ctrl
--------- --------------- ------ ------- ---- ------ ----- -- -------------------
Gi1/0/10  xxxxxxxxxx      Full   1000    Auto Up     Off   A  100

While the host can see the link is active and is sending packets, the counters on the switch show null.

show interfaces counter output:

#show interfaces counters gi1/0/10      

  Port      InTotalPkts      InUcastPkts      InMcastPkts      InBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Gi1/0/10                 0                0                0                0

  Port      OutTotalPkts     OutUcastPkts     OutMcastPkts     OutBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Gi1/0/10              3726                0             2839              887

FCS Errors: ................................... 0
Single Collision Frames: ...................... 0
Late Collisions: .............................. 0
Excessive Collisions: ......................... 0
Multiple Collisions: .......................... 0
Received packets dropped > MTU: ............... 0
Transmitted oversized packets: ................ 0
Internal MAC Rx Errors: ....................... 0
Received Pause Frames: ........................ 0
Transmitted Pause Frames: ..................... 0
Receive Packets Discarded: .................... 0
Transmit Packets Discarded: ................... 0

 Alternately, from the above output one can tell there are outgoing packets sent from the port but the host reports there is zero packets received.

There is not unusual configuration applied to that port:

#show running-config interface gi1/0/10         

description "xxxxxxxxxx"
spanning-tree portfast
spanning-tree portfast bpdufilter default
switchport access vlan 100

I have found one abnormality, it is dynamic addresses count at the maximum value filling 32 bits:

#show mac address-table count interface gi1/0/10

Capacity: 25600
Used: 4294967295
Static addresses: 0
Secure addresses: 0
Dynamic addresses: 4294967295
Internal addresses: 0

while there is no addresses assigned to that port:

#show mac address-table interface gi1/0/10      

Aging time is 300 Sec

Vlan     Mac Address           Type        Port
-------- --------------------- ----------- ---------------------

Forwarding Database Empty.

 From the second last output is looks like a software bug, the switch cannot register any new MAC address, because Used counter is exceeding Capacity, resulting in dropping incoming packets.

This is model N2048 with software version 6.5.3.3, deployed in production as 4 unit stack, and we cannot easily reboot the stack at the moment.

Any thought on the above issue? Thanks.