02-03-2015 04:13 PM - edited 03-07-2019 10:29 PM
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
02-03-2015 08:57 PM
I wouldn't be worried about that. You'll see this counter go up on Trunk ports: Dot1Q and ISL.
02-03-2015 09:01 PM
Thanks Leo,
appreciate your responce
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: