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Too Large frames

Unanswered Question
Feb 3rd, 2015
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Hi all,

 

I am getting high counters on ISL trunk ports across all my switches

There seem to be no errors but I get "Too large Frames" on the Transmit

and "Valid frames, too large" on the Receive, the MTU across all switches is 1500,

I do not see these issues on any other ports except the trunks, I am not sure if this is a problem,

does anybody have any idea if this is something I should be concerned about, unfortunately this is a remote location

so I am unable to attend the site to do a wireshark trace to see what these packets are?

 

Below are the show controllers and show interface output for one such port

 

Transmit GigabitEthernet1/0/11           Receive

   1985737654 Bytes                       1875094148 Bytes

      8481583 Unicast frames                 9035176 Unicast frames

       524296 Multicast frames                 43508 Multicast frames

       457112 Broadcast frames                 42376 Broadcast frames

            0 Too old frames              1587874771 Unicast bytes

            0 Deferred frames                8103346 Multicast bytes

            0 MTU exceeded frames            5484381 Broadcast bytes

            0 1 collision frames                   0 Alignment errors

            0 2 collision frames                   0 FCS errors

            0 3 collision frames                   0 Oversize frames

            0 4 collision frames                   0 Undersize frames

            0 5 collision frames                   0 Collision fragments

            0 6 collision frames

            0 7 collision frames                   5 Minimum size frames

            0 8 collision frames             6327442 65 to 127 byte frames

            0 9 collision frames             1328933 128 to 255 byte frames

            0 10 collision frames             867097 256 to 511 byte frames

            0 11 collision frames             177976 512 to 1023 byte frames

            0 12 collision frames             255627 1024 to 1518 byte frames

            0 13 collision frames                  0 Overrun frames

            0 14 collision frames                  0 Pause frames

            0 15 collision frames

            0 Excessive collisions                 0 Symbol error frames

            0 Late collisions                      0 Invalid frames, too large

            0 VLAN discard frames             163980 Valid frames, too large

            0 Excess defer frames                  0 Invalid frames, too small

            3 64 byte frames                       0 Valid frames, too small

      2017248 127 byte frames

       265988 255 byte frames                      0 Too old frames

       207425 511 byte frames                      0 Valid oversize frames

       454576 1023 byte frames                     0 System FCS error frames

      1467674 1518 byte frames                     0 RxPortFifoFull drop frame

      5050077 Too large frames

            0 Good (1 coll) frames

            0 Good (>1 coll) frames

 

 

core1#show interfaces gigabitEthernet 1/0/11

GigabitEthernet1/0/11 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is b838.6176.fd0b (bia b838.6176.fd0b)

  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not set

  Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseLX SFP

  input flow-control is off, output flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:29, 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 411000 bits/sec, 231 packets/sec

  5 minute output rate 2240000 bits/sec, 234 packets/sec

     9244336 packets input, 1907654152 bytes, 0 no buffer

     Received 86053 broadcasts (43663 multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 43663 multicast, 0 pause input

     0 input packets with dribble condition detected

     9587399 packets output, 10729144282 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

 

Thanks in advance any suggestions are welcome

 

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Leo Laohoo Tue, 02/03/2015 - 20:57
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I wouldn't be worried about that.  You'll see this counter go up on Trunk ports:  Dot1Q and ISL.

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