检查思科交换机拥塞

show int和show int summary命令都应该给你提供足够的信息，至less可以看到你在某个端口上是否有问题。

show int summary命令将为您提供每个接口的input/输出保持队列以及每秒计数的当前比特和数据包以及从input/输出队列中丢弃的数据包的概览。

  #show int summary *: interface is up IHQ: pkts in input hold queue IQD: pkts dropped from input queue OHQ: pkts in output hold queue OQD: pkts dropped from output queue RXBS: rx rate (bits/sec) RXPS: rx rate (pkts/sec) TXBS: tx rate (bits/sec) TXPS: tx rate (pkts/sec) TRTL: throttle count Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL ----------------------------------------------------------------------------------------------------------------- Vlan1 0 0 0 0 0 0 0 0 0 * Vlan2 1 0 0 0 6000 8 6000 4 0 FastEthernet0 0 0 0 0 0 0 0 0 0 GigabitEthernet1/0/1 0 0 0 0 0 0 0 0 0 GigabitEthernet1/0/2 0 0 0 0 0 0 0 0 0 * GigabitEthernet1/0/3 0 0 0 0 0 0 0 0 0 * GigabitEthernet1/0/4 0 0 0 0 9000 4 190000 19 0 * GigabitEthernet1/0/5 0 0 0 0 3000 2 36000 15 0 * GigabitEthernet1/0/6 0 0 0 0 3000 2 17000 13 0 GigabitEthernet1/0/7 0 0 0 0 0 0 0 0 0 * GigabitEthernet1/0/8 0 0 0 0 114000 7 196000 30 0 * GigabitEthernet1/0/9 0 0 0 0 136000 32 270000 43 0 * GigabitEthernet1/0/10 0 0 0 0 7000 8 254000 27 0 GigabitEthernet1/0/11 0 0 0 0 0 0 0 0 0 * GigabitEthernet1/0/12 0 0 0 0 0 0 12000 11 0 * GigabitEthernet1/0/13 0 0 0 15 1000 0 16000 13 0 * GigabitEthernet1/0/14 0 0 0 0 1000 1 13000 12 0 * GigabitEthernet1/0/15 0 0 0 0 1000 1 14000 12 0 GigabitEthernet1/0/16 0 0 0 0 0 0 36000 6 0 * GigabitEthernet1/0/17 0 0 0 0 8000 10 35000 43 0 GigabitEthernet1/0/18 0 0 0 0 0 0 0 0 0 GigabitEthernet1/0/19 0 0 0 0 0 0 0 0 0 GigabitEthernet1/0/20 0 0 0 0 0 0 0 0 0 * GigabitEthernet1/0/21 0 0 0 0 23000 32 20000 22 0 * GigabitEthernet1/0/22 0 0 0 0 0 0 12000 11 0 * GigabitEthernet1/0/23 0 0 0 0 0 0 12000 11 0 GigabitEthernet1/0/24 0 0 0 0 0 0 0 0 0 * GigabitEthernet1/0/25 0 0 0 0 0 0 78000 11 0 * GigabitEthernet1/0/26 0 0 0 0 0 0 12000 11 0 * GigabitEthernet1/0/27 0 0 0 0 7000 4 215000 20 0 * GigabitEthernet1/0/28 0 0 0 0 0 0 12000 11 0 GigabitEthernet1/0/29 0 0 0 0 0 0 0 0 0 * GigabitEthernet1/0/30 0 0 0 0 1000 1 13000 13 0 GigabitEthernet1/0/31 0 0 0 0 0 0 0 0 0 * GigabitEthernet1/0/32 0 0 0 0 0 0 12000 13 0 * GigabitEthernet1/0/33 0 0 0 0 0 0 12000 11 0 * GigabitEthernet1/0/34 0 0 0 0 51000 30 434000 56 0 * GigabitEthernet1/0/35 0 0 0 0 0 0 61000 14 0 * GigabitEthernet1/0/36 0 0 0 0 0 0 12000 11 0 * GigabitEthernet1/0/37 0 0 0 0 0 0 172000 42 0 * GigabitEthernet1/0/38 0 0 0 0 0 0 12000 12 0 * GigabitEthernet1/0/39 0 0 0 0 0 0 12000 12 0 * GigabitEthernet1/0/40 0 0 0 0 491000 832 63201000 5869 0 * GigabitEthernet1/0/41 0 0 0 0 1000 1 13000 13 0 * GigabitEthernet1/0/42 0 0 0 0 28000 3 62000 17 0 * GigabitEthernet1/0/43 0 0 0 0 0 0 112000 12 0 GigabitEthernet1/0/44 0 0 0 0 0 0 0 0 0 * GigabitEthernet1/0/45 0 0 0 0 0 0 14000 15 0 GigabitEthernet1/0/46 0 0 0 0 0 0 0 0 0 --More-- 

我将从一个show interfaces开始，例如下面的例子。 你应该能够看到什么接口（如果有的话）显示数据包错误，在这一点上，你需要做一些故障排除或诊断，以确定为什么。

 [some-switch-thing]#sh int FastEthernet0/0 is up, line protocol is up Hardware is Gt96k FE, address is [some-MAC-address-thing] (bia some-MAC-address-thing) Internet address is [some-IP-address-thing] MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 100Mb/s, 100BaseTX/FX ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:01, output 00:00:00, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 112000 bits/sec, 51 packets/sec 5 minute output rate 207000 bits/sec, 46 packets/sec 329320347 packets input, 534153518 bytes Received 4483582 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog 0 input packets with dribble condition detected 320121443 packets output, 1884667704 bytes, 0 underruns 0 output errors, 0 collisions, 3 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out