Perhaps someone can help us out a little bit.
We have a Nexus switch that is connected to a bunch of servers and has an upstream connection to our core.
For some reason we see the switch transmitting a lot of jumbo packets despite the fact that none of the servers are sending jumbo packets. In fact the egress port doesn't see any inbound jumbo packets..
Ethernet1/15 is up
Hardware: 1000/10000 Ethernet, address: f866.f27d.6fe4 (bia f866.f27d.6fe4)
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
Port mode is trunk
full-duplex, 10 Gb/s, media type is 10g
Input flow-control is off, output flow-control is off
Rate mode is dedicated
Switchport monitor is off
Last link flapped 1week(s) 3day(s)
Last clearing of "show interface" counters never
1 minute input rate 30267072 bits/sec, 21384 packets/sec
1 minute output rate 41052528 bits/sec, 20295 packets/sec
Rx
141428733917 input packets 117006081538 unicast packets 24404722805 multicast packets
17933114 broadcast packets 0 jumbo packets 0 storm suppression packets
20710996269479 bytes
Tx
134309200288 output packets 15170283276 multicast packets
32333 broadcast packets 3234301155 jumbo packets
23749465522981 bytes
0 input error 0 short frame 0 watchdog
0 no buffer 0 runt 0 CRC 0 ecc
0 overrun 0 underrun 0 ignored 0 bad etype drop
0 bad proto drop 0 if down drop 0 input with dribble
76208 input discard
0 output error 0 collision 0 deferred
0 late collision 0 lost carrier 0 no carrier
0 babble
0 Rx pause 0 Tx pause
How can this be? Why is it sending jumbo packets? Is it somehow combing multiple Ethernet packets together?
