Hi all,
on some of our ports on Nexu 5000 and on the connected FEX we can see a lot of Jumbo Packets though there is not enableed any JumboFrame on the Switch, all Interface and system MTU is set to 1500.
Any idea what the reason could be ?
DBE-LINZ-XX41# sh int Eth113/1/27
Ethernet113/1/27 is up
Hardware: 100/1000 Ethernet, address: d0d0.fd1b.b69c (bia d0d0.fd1b.b69c)
Description: LNZTSM01
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec
reliability 255/255, txload 23/255, rxload 1/255
Encapsulation ARPA
Port mode is access
full-duplex, 1000 Mb/s
Beacon is turned off
Input flow-control is off, output flow-control is on
Switchport monitor is off
EtherType is 0x8100
Last link flapped 6d05h
Last clearing of "show interface" counters never
30 seconds input rate 852552 bits/sec, 1663 packets/sec
30 seconds output rate 64087584 bits/sec, 5407 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 1.02 Mbps, 1.96 Kpps; output rate 91.23 Mbps, 7.69 Kpps
RX
2485768492 unicast packets 584586 multicast packets 204506 broadcast packets
2486557584 input packets 316104351138 bytes
46589374 jumbo packets 0 storm suppression packets
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
15585478160 unicast packets 3257120 multicast packets 9075777 broadcast packets
15597811058 output packets 22869193087701 bytes
16174552 jumbo packets
1 output errors 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 0 output discard
0 Tx pause
3 interface resets
DBE-LINZ-XX41#
DBE-LINZ-XX41# sh int Eth113/1/27 counters trunk
--------------------------------------------------------------------------------
Port TrunkFramesTx TrunkFramesRx WrongEncap
--------------------------------------------------------------------------------
Eth113/1/27 241207284 132894381 0
DBE-LINZ-XX41# sh int Eth113/1/27 counters errors
--------------------------------------------------------------------------------
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards
--------------------------------------------------------------------------------
Eth113/1/27 0 0 0 0 0 0
--------------------------------------------------------------------------------
Port Single-Col Multi-Col Late-Col Exces-Col Carri-Sen Runts
--------------------------------------------------------------------------------
Eth113/1/27 0 0 0 0 0 0
--------------------------------------------------------------------------------
Port Giants SQETest-Err Deferred-Tx IntMacTx-Er IntMacRx-Er Symbol-Err
--------------------------------------------------------------------------------
Eth113/1/27 0 -- 0 0 0 0
DBE-LINZ-XX41# sh int Eth113/1/27 counters storm-control
--------------------------------------------------------------------------------
Port UcastSupp % McastSupp % BcastSupp % TotalSuppDiscards
--------------------------------------------------------------------------------
Eth113/1/27 100.00 100.00 100.00 0
DBE-LINZ-XX41# sh int Eth113/1/27 counters detailed
Ethernet113/1/27
Rx Packets: 2486518514
Rx Unicast Packets: 2485729448
Rx Multicast Packets: 584561
Rx Broadcast Packets: 204505
Rx Jumbo Packets: 46589374
Rx Bytes: 316101848567
Rx Packets from 0 to 64 bytes: 1773531487
Rx Packets from 65 to 127 bytes: 567547819
Rx Packets from 128 to 255 bytes: 20043087
Rx Packets from 256 to 511 bytes: 19417196
Rx Packets from 512 to 1023 bytes: 7292742
Rx Packets from 1024 to 1518 bytes: 52096809
Rx Trunk Packets: 132894381
Tx Packets: 15597681912
Tx Unicast Packets: 15585349564
Tx Multicast Packets: 3257037
Tx Broadcast Packets: 9075310
Tx Jumbo Packets: 16174552
Tx Bytes: 22869001813057
Tx Packets from 0 to 64 bytes: 34480870
Tx Packets from 65 to 127 bytes: 193872533
Tx Packets from 128 to 255 bytes: 54037447
Tx Packets from 256 to 511 bytes: 87243119
Tx Packets from 512 to 1023 bytes: 335063194
Tx Packets from 1024 to 1518 bytes: 14876810197
Tx Trunk Packets: 241207284
Output Errors: 1
DBE-LINZ-XX41# sh int Eth113/1/27
Ethernet113/1/27 is up
Hardware: 100/1000 Ethernet, address: d0d0.fd1b.b69c (bia d0d0.fd1b.b69c)
Description: LNZTSM01
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec
reliability 255/255, txload 23/255, rxload 1/255
Encapsulation ARPA
Port mode is access
full-duplex, 1000 Mb/s
Beacon is turned off
Input flow-control is off, output flow-control is on
Switchport monitor is off
EtherType is 0x8100
Last link flapped 6d05h
Last clearing of "show interface" counters never
30 seconds input rate 852552 bits/sec, 1663 packets/sec
30 seconds output rate 64087584 bits/sec, 5407 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 1.02 Mbps, 1.96 Kpps; output rate 91.23 Mbps, 7.69 Kpps
RX
2485768492 unicast packets 584586 multicast packets 204506 broadcast packets
2486557584 input packets 316104351138 bytes
46589374 jumbo packets 0 storm suppression packets
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
15585478160 unicast packets 3257120 multicast packets 9075777 broadcast packets
15597811058 output packets 22869193087701 bytes
16174552 jumbo packets
1 output errors 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 0 output discard
0 Tx pause
3 interface resets
DBE-LINZ-XX41#
