Hi,
we see a lot of "Transmitted oversized packets" on our N-series switches (N2000, N3000, and N4000). This happens most likely on uplink ports. As an example, here are the results from an N2000 connected to an N4000 switch.
N2000
Port InTotalPkts InUcastPkts InMcastPkts InBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Te1/0/1 1149752996 1076765475 30946557 42040964
Port OutTotalPkts OutUcastPkts OutMcastPkts OutBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Te1/0/1 652090332 642995998 4801450 4292884
FCS Errors: ................................... 0
Single Collision Frames: ...................... 0
Late Collisions: .............................. 0
Excessive Collisions: ......................... 0
Multiple Collisions: .......................... 0
Received packets dropped > MTU: ............... 0
Transmitted oversized packets: ................ 70541821
Internal MAC Rx Errors: ....................... 0
Received Pause Frames: ........................ 0
Transmitted Pause Frames: ..................... 0
Receive Packets Discarded: .................... 939578
Transmit Packets Discarded: ................... 0
N4000
Port InTotalPkts InUcastPkts InMcastPkts InBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Te1/0/21 652205773 643109303 4802337 4294133
Port OutTotalPkts OutUcastPkts OutMcastPkts OutBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Te1/0/21 1149984915 1076962528 30955041 42067346
FCS Errors: ................................... 0
Single Collision Frames: ...................... 0
Late Collisions: .............................. 0
Excessive Collisions: ......................... 0
Multiple Collisions: .......................... 0
Received packets dropped > MTU: ............... 0
Transmitted oversized packets: ................ 624841267
Internal MAC Rx Errors: ....................... 0
Received Pause Frames: ........................ 0
Transmitted Pause Frames: ..................... 0
Receive Packets Discarded: .................... 322420
Transmit Packets Discarded: ................... 0
Received PFC Frames: .......................... 0
Transmitted PFC Frames: ....................... 0
Both have the latest firmware (v6.3.3.10). At least on this N4000 only ports connected to other switches shows this behavior. At least on this N4000 all server ports have zero counters. mtu size is default, no manual changes. Port configs are as follow
N2000
switchport mode general
switchport general allowed vlan add 241-246,248-249,259,268-269,279 tagged
switchport general allowed vlan add 332,402,412,475,501-504,750,787,789 tagged
switchport general allowed vlan add 792,802,804,811,912,928-929,952 tagged
lldp transmit-tlv sys-desc sys-cap
lldp transmit-mgmt
lldp notification
voice vlan 912
voice vlan auth disable
N4000
switchport mode general
switchport general allowed vlan add 241-246,248-249,259,268-269,279 tagged
switchport general allowed vlan add 332,402,412,475,501-504,750,787,789 tagged
switchport general allowed vlan add 792,802,804,811,912,928-929,952 tagged
lldp transmit-tlv sys-desc sys-cap
lldp transmit-mgmt
lldp notification
voice vlan 912
voice vlan auth disable
Not sure, if this corresponds to VoIP problems on this switches. Any idea, where this numbers come from?