Cisco 3850 交换机上的输出数据包丢弃

网络工程 顺式催化剂
2022-03-03 05:49:41

我在交换机上得到输出下降实际上我有捆绑 4 个端口的 ethercannel,这些端口正在连接到我们的 hyperV 服务器。我们每天都会将镜像安排到我们的另一台服务器所以每当传输开始时,我们都会从 Opmanager 收到警报,接口的丢弃率达到 80% 文件传输非常大,我检查了接口计数器,我看到输出下降也太高了

这是一些显示命令结果

show inter po12
Port-channel12 is up, line protocol is up (connected)
  Hardware is EtherChannel, address is 0045.1d05.e10e (bia 0045.1d05.e10e)
  Description: Link Aggregation Channel on (VRTX A) Master and Slave on Port 1/0/14,16, 2/0/14,16 (HOSTA02)
  MTU 1500 bytes, BW 4000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, link type is auto, media type is
  input flow-control is off, output flow-control is unsupported
  Members in this channel: Gi1/0/14 Gi1/0/16 Gi2/0/14 Gi2/0/16
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, output hang never
  Last clearing of "show interface" counters 20:13:25
  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 35357406
  Queueing strategy: fifo
  Output queue: 0/0 (size/max)
  5 minute input rate 1292000 bits/sec, 227 packets/sec
  5 minute output rate 1208000 bits/sec, 330 packets/sec
     94073330 packets input, 117676230666 bytes, 0 no buffer
     Received 22188 broadcasts (9166 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 9166 multicast, 0 pause input
     0 input packets with dribble condition detected
     62893972 packets output, 50371697251 bytes, 0 underruns
     0 output errors, 0 collisions, 0 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


show run int po12
Building configuration...
!
interface Port-channel12
  switchport mode trunk
 spanning-tree bpduguard enable
end

show interfaces po12 counters errors

Port        Align-Err     FCS-Err    Xmit-Err     Rcv-Err  UnderSize  OutDiscards
Po12                0           0           0           0          0     35357406

Port      Single-Col  Multi-Col   Late-Col  Excess-Col  Carri-Sen      Runts
Po12               0          0          0           0          0          0

到目前为止,我们还没有配置 QOS 或 strom 控制有什么建议吗???

2个回答

Output queue: 0/0 (size/max)

有人变得可爱并禁用了输出队列。如果帧不能立即转发(“零延迟”),它就会被丢弃。显然,不要这样做™。(他们也在使用输入队列,因为默认不是 2000。)

hold-queue 0 out您会在界面配置中看到类似的内容。

由于交换机接口上的吞吐量问题,数据包正在排队。由于网络拥塞导致文件无法转发,导致网络上的高带宽利用率来克服这个问题,增加接口的吞吐量并测试连接性,同时检查 3850 交换机上的内存、处理器资源利用率。