I am working with a customer and we are seeing a number of switches showing a large volume of output drops. This customer currently uses the 4948 series switch for their storage network. So these are the backend connections between server and storage devices. They are on the same same vlan and these switches are dedicated to this purpose only.
Can anyone lend a hand as to why we would see output drops on some interfaces but not all interfaces? Is this 'normal' on a storage network?
Here is a sample of a show interface on one of the switches.
W4948-04#sh int g1/17
GigabitEthernet1/17 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet Port, address is 0019.e72a.7a90 (bia 0019.e72a.7a90)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 11/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is 10/100/1000-TX
input flow-control is on, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters 02:09:31
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 24970
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 44172000 bits/sec, 5042 packets/sec
0 packets input, 12535104 bytes, 0 no buffer
Received 0 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
39354545 packets output, 41188424424 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Any and all help is appreciated.