11-27-2013 03:18 PM - edited 03-04-2019 09:42 PM
Hi,
I have seen outdiscard errors on almost all the interfaces on a 3750 switch, The other counters are fine. Please see example below
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards
Fa1/0/1 0 0 0 0 0 1973
Fa1/0/2 0 0 0 0 0 2510
Fa1/0/3 0 0 0 0 0 16
Fa1/0/4 0 0 0 0 0 2537
Fa1/0/5 0 0 0 0 0 60
Fa1/0/6 0 0 0 0 0 5234
The version on the switch is
Version 12.2(44)SE5
Is this a cosmetic bug or something else?
TIA.
PF
11-27-2013 05:18 PM
Post the output to the command "sh controller ether
11-27-2013 05:24 PM
Leo,
Thanks for you reply. Here the output on one of the interfaces.
Thanks.
PF
sh controllers ethernet-controller fa1/0/5
Transmit FastEthernet1/0/5 Receive
3168669192 Bytes 3312837171 Bytes
12135059 Unicast frames 10358331 Unicast frames
12326652 Multicast frames 133105 Multicast frames
9397857 Broadcast frames 12765 Broadcast frames
0 Too old frames 3281774438 Unicast bytes
0 Deferred frames 26758791 Multicast bytes
0 MTU exceeded frames 1632366 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 3798483 Minimum size frames
0 8 collision frames 493527 65 to 127 byte frames
0 9 collision frames 2517952 128 to 255 byte frames
0 10 collision frames 2374205 256 to 511 byte frames
0 11 collision frames 359315 512 to 1023 byte frames
0 12 collision frames 960719 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 0 Valid frames, too large
0 Excess defer frames 0 Invalid frames, too small
5875378 64 byte frames 0 Valid frames, too small
7919321 127 byte frames
8549995 255 byte frames 0 Too old frames
6586526 511 byte frames 0 Valid oversize frames
580647 1023 byte frames 0 System FCS error frames
4347701 1518 byte frames 0 RxPortFifoFull drop frame
0 Too large frames
0 Good (1 coll) frames
0 Good (>1 coll) frames
11-27-2013 10:36 PM
You have a Gigabit uplink? The buffers on the Catalysts are quite small so when using different speeds you can see drops. Also if there is a lot of microbursting. Can you have a look at the show platform port-asic as well.
Daniel Dib
CCIE #37149
11-28-2013 04:16 PM
Daniel,
Thanks for your reply.
Yes we do have GIgabit uplink. The following is sh platform port-asic stats drop. By the way, we have other Gig switches (WS-C3750E-48TD, version 12.2(58)SE2, no QoS ) with the same issue.
sh platform port-asic stats drop
Port-asic Port Drop Statistics - Summary
========================================
RxQueue 0 Drop Stats: 0
RxQueue 1 Drop Stats: 0
RxQueue 2 Drop Stats: 0
RxQueue 3 Drop Stats: 0
Port 0 TxQueue Drop Stats: 0
Port 1 TxQueue Drop Stats: 0
Port 2 TxQueue Drop Stats: 2508
Port 3 TxQueue Drop Stats: 904
Port 4 TxQueue Drop Stats: 9276
Port 5 TxQueue Drop Stats: 4902
Port 6 TxQueue Drop Stats: 3013
Port 7 TxQueue Drop Stats: 6004
Port 8 TxQueue Drop Stats: 1038
Port 9 TxQueue Drop Stats: 1420
Port 10 TxQueue Drop Stats: 3128
Port 11 TxQueue Drop Stats: 2200
Port 12 TxQueue Drop Stats: 4582
Port 13 TxQueue Drop Stats: 2296
Port 14 TxQueue Drop Stats: 4809
Port 15 TxQueue Drop Stats: 1684
Port 16 TxQueue Drop Stats: 8599
Port 17 TxQueue Drop Stats: 869
Port 18 TxQueue Drop Stats: 9848
Port 19 TxQueue Drop Stats: 3055
Port 20 TxQueue Drop Stats: 2562
Port 21 TxQueue Drop Stats: 682
Port 22 TxQueue Drop Stats: 12466
Port 23 TxQueue Drop Stats: 19
Port 24 TxQueue Drop Stats: 0
Port 25 TxQueue Drop Stats: 0
Supervisor TxQueue Drop Statistics
Queue 0: 0
Queue 1: 0
Queue 2: 0
Queue 3: 0
Queue 4: 0
Queue 5: 0
Queue 6: 0
Queue 7: 0
Queue 8: 509
Queue 9: 0
Queue 10: 0
Queue 11: 0
Queue 12: 0
Queue 13: 0
Queue 14: 0
Queue 15: 0
..
(output truncated)
Thanks.
PF
11-28-2013 02:29 AM
That's not a particularly large number of output discards especially for that platform. Do you have qos enabled on those ports by chance?
11-28-2013 04:04 PM
Reuben,
Thanks for you reply.
Yes. This what we configured on the interface
auto qos voip trust
Thanks.
PF
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