Hello,
All of our C4948-10G have increasing "output drops" counters. Here's the example of port statistics (this is a SPAN port that drops packets continously
when port load is about 200Mbps/50k pps).
GigabitEthernet1/1 is up, line protocol is down (monitoring)
Hardware is Gigabit Ethernet Port, address is 0021.d809.6100 (bia 0021.d809.6100)
Description: SPAN
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 45/255, 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 never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 853098790
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 177443000 bits/sec, 45447 packets/sec
3989 packets input, 5036752115 bytes, 0 no buffer
Received 3989 broadcasts (0 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
1804766864558 packets output, 1290148458844910 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
What can be the cause of such behavior? Is 50K pps too much for 1Gig port of 4948?
WM
