11-19-2012 05:59 AM - edited 03-07-2019 10:07 AM
Hi,
Need some help figuring out what is causing the interface discards and how to solve this behaviour.
Thanks in advance.
Key points:
1: No QoS on the switch
2: This switch only passes multicast traffic to a cat4500
Interfce config:
interface GigabitEthernet1/0/49
description => SECURITY
switchport trunk allowed vlan 8,9
switchport mode trunk
channel-group 1 mode active
interface Port-channel1
description => SECURITY
switchport trunk allowed vlan 8,9
switchport mode trunk
Interface stats:
SW2#sh int g1/0/49
GigabitEthernet1/0/49 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 64ae.0c75.29b1 (bia 64ae.0c75.29b1)
Description: => SECURITY
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 19/255, rxload 2/255
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 00:00:11, output 00:00:01, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 4999376
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 10112000 bits/sec, 1042 packets/sec
5 minute output rate 78275000 bits/sec, 7163 packets/sec
19677030336 packets input, 25263816548777 bytes, 0 no buffer
Received 1875561822 broadcasts (1831799088 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 1831799088 multicast, 0 pause input
0 input packets with dribble condition detected
146563144209 packets output, 199802264781424 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
Solved! Go to Solution.
11-19-2012 07:29 AM
You may be hitting the bug CSCtq86186
Run this command constantly for 5-10 times and you will see different (bogus) values of output drops and if so, upgrade to 15.0.2. I did the upgrade and it went away. Please rate the helpful post.
sh int g1/0/49 | i output drops
11-19-2012 06:01 AM
More stats.
11-19-2012 07:29 AM
You may be hitting the bug CSCtq86186
Run this command constantly for 5-10 times and you will see different (bogus) values of output drops and if so, upgrade to 15.0.2. I did the upgrade and it went away. Please rate the helpful post.
sh int g1/0/49 | i output drops
11-20-2012 07:30 AM
Thanks Nawas,
I had upgraded a couple of switches 2 weeks ago for another reason and they are not reporting the bogus drops as they used too.
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