Hi !
We have a problem with switch connected to an IBM Chassis (model : WS-CBS3012-IBM-I).
Several links seem to flap from time to time and we have dropped packets (Outdiscards) :
XXX#show interfaces counters errors
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards
Gi0/7 0 0 0 0 0 43983
XXX#show controllers ethernet-controller gigabitEthernet 0/7
Transmit GigabitEthernet0/7 Receive
2584788113 Bytes 971769475 Bytes
2128747524 Unicast frames 2142250737 Unicast frames
10109338 Multicast frames 7644 Multicast frames
11694673 Broadcast frames 1660 Broadcast frames
0 Too old frames 991831483 Unicast bytes
0 Deferred frames 726180 Multicast bytes
0 MTU exceeded frames 106240 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 0 Minimum size frames
0 8 collision frames 208582465 65 to 127 byte frames
0 9 collision frames 286273443 128 to 255 byte frames
0 10 collision frames 15408397 256 to 511 byte frames
0 11 collision frames 12313490 512 to 1023 byte frames
0 12 collision frames 10599137 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 1609083109 Valid frames, too large
0 Excess defer frames 0 Invalid frames, too small
320523 64 byte frames 0 Valid frames, too small
396763728 127 byte frames
6601722 255 byte frames 0 Too old frames
28139208 511 byte frames 0 Valid oversize frames
4064656 1023 byte frames 0 System FCS error frames
285633065 1518 byte frames 0 RxPortFifoFull drop frame
1429028633 Too large frames
0 Good (1 coll) frames
0 Good (>1 coll) frames
The interface is Full-1000 and is configured :
interface GigabitEthernet0/7
description "SRV-001-PRD-VM1 - VMNic0"
switchport trunk allowed vlan 11,12,99
switchport mode trunk
link state group 1 downstream
end
For the "too large frames", I have already read the post : https://supportforums.cisco.com/discussion/11034901/too-large-frames-what-does-mean-performance, so, I think it's not serious.
But I don't know why some packets are dropped because the configuration seems good ...
Can you help me please ?
Thank you in advance !
