@browneyed_wifiwrote:
We already have jumbo frames enabled on the LAN. Yet I am still getting giants, at certain times of the day we have a large data push due to our business model.
Based on the show int stats provided earlier, it does not appear that jumbo frames are enabled for this interface. If so, the show interface should appear as below:
3560-Desk#show int gig 0/4
GigabitEthernet0/4 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 2401.c740.bc84 (bia 2401.c740.bc84)
Description: "NAS"
MTU 9000 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 7000 bits/sec, 12 packets/sec
268 packets input, 43039 bytes, 0 no buffer
Received 120 broadcasts (22 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 22 multicast, 0 pause input
0 input packets with dribble condition detected
7418 packets output, 703268 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
3560-Desk#
Since the MTU for your interface is still showing 1500, it appears as though the switch isn't supporting jumbo frames. What does "show system mtu" return with run on your switch?
3560-Desk#show system mtu
System MTU size is 1500 bytes
System Jumbo MTU size is 9000 bytes
System Alternate MTU size is 1500 bytes
Routing MTU size is 1500 bytes
3560-Desk#